How to Change the Oil in Harley Davidson Cars

by Contributing Writer; Updated June 12, 2017

Basic maintenance for a Harley Davidson car Softail Classic motorcycle is fairly simple, often involving the draining and replacement of the motor's oil supply and the fluids used by the transmission and primary drive. Standard practice for the Harley Davidson car is to change the transmission and primary drive fluids along with the oil. Harley Davidson car owners can accomplish this on a weekend afternoon using common hand tools. Warming up the motorcycle and its oil supply can help make the task easier, but take the time to locate the various drain plugs before beginning to prevent burning yourself on the motor's surface.

Under The Hood:

 How to Change the Oil in a Harley-Davidson Heritage Softail Motorcycle

Warm your Heritage Softail's engine and oil. Start the engine and let it idle in place for three minutes, then stop the engine. Mount your Heritage Softail on a service stand, or place a 3-inch block of wood under the motorcycle's side stand to elevate it into an upright position.

Push down on the oil tank filler cap, then twist the cap counterclockwise to unlock it from the oil tank filler neck. Pull the cap and its attached dipstick out of the oil tank to vent the oil system.

Locate the oil drain plug. Softail models built between 1984 to 1999 are equipped with an Evolution engine, which uses an oil drain hose placed in front of the transmission unit, on the left side of the motorcycle. Softail models built after 2000 are equipped with the newer Twin Cam engine, placing the oil drain plug on a cross-member below the rear of the transmission unit.

Place an oil drain pan under the oil drain plug or hose. Unscrew the drain plug with a 5/8-inch socket and a socket wrench, or loosen the drain hose clamp with a flat-head screwdriver and pull out the hose plug. Allow your Heritage Softail's oil to drain for a minimum of five minutes or until the flow of oil slows to a thin trickle.

Clean the drain plug with a shop towel and replace its sealing O-ring with a new O-ring. Screw the drain plug into the cross-member, by hand, then tighten it to 20 foot-pounds with a 5/8-inch socket and a torque wrench -- this step applies only to Softail models equipped with a Twin Cam engine.

Wipe the drain hose with a shop towel, then push the hose plug into place. Tighten the drain hose clamp with a flat-head screwdriver -- this step applies only to Softail models equipped with an Evolution engine.

Clean the area around the oil filter and the oil pump, located on the front left side of the engine, using a parts cleaning spray. Loosen the oil filter with a cap-style oil filter wrench, then unscrew the oil filter by hand. Clean the oil pump's mating surface and threads with a parts cleaning spray, then wipe dry with a shop towel.

Unpackage your new oil filter and pour up to four ounces of 20W50 motor oil into the filter. Let the filter's paper element absorb the oil for one minute, then spread a thin coat of oil around the oil filter's sealing O-ring. Screw the oil filter into place, by hand, until it is seated against the oil pump. Tighten the oil filter an additional quarter-turn, by hand. Wipe away any spilled oil with a shop towel.

Place a funnel into the oil tank filler neck, then fill the tank with 2.6 qts. of 20W50 motor oil. Remove the funnel from the oil tank. Push the oil filler cap and dipstick into the filler neck, then twist it clockwise to lock it in place.

Start the engine and let it idle for another three minutes, then stop the engine. Remove the oil cap and wipe its dipstick clean with a shop towel. Reinsert the dipstick into the oil tank filler neck until the cap is resting on the filler neck's rim. Withdraw the dipstick and take note of the oil level in relation to the upper and lower marks cut into the dipstick. If the oil level is below the lower mark, add a small amount of 20W50 motor oil into the oil tank, then recheck the oil level. Wipe the dipstick again with a shop towel, then reinstall the oil cap if the oil level is situated between both marks.

Items you will need

  • Service stand or a 3-inch block of wood

  • Drain pan

  • 5/8-inch socket

  • Socket wrench

  • Flat-head screwdriver

  • Shop towels

  • Sealing O-ring

  • Torque wrench

  • Parts cleaning spray

  • Cap-style oil filter wrench

  • Oil filter

  • 3 quarts 20W50 motor oil

  • Funnel

 How to Change the Oil in a Dyna Wide Glide

Warm the oil first by taking the motorcycle for a short ride around the block. Warm oil flows more easily and will help rid the crankcase sump of contaminants.

Stand the bike securely upright. Place an oil drain pan beneath the drain plug on the underside of the bike. The plug has a 5/8-inch hex-shaped head.

Assemble your wrench by first attaching the 3-inch extension to the wrench and then the socket on the end of the extension. Using the wrench, turn the oil drain plug beneath the motorcycle counterclockwise to remove it. Oil will begin pouring from the sump into the pan. Your fingers may get a little dirty here.

Use a rag to clean the threads of the drain plug. Afterwards, coat them with Teflon plumbers paste to ensure easy removal of the plug in the future.

Remove the rubber O-ring from the plug and replace it with a new one. A new O-ring will ensure an airtight seal for the plug when replaced.

Reinstall the drain plug once all the old oil has drained. Turn the plug clockwise with your socket wrench to tighten. The bolt is secure when the wrench can no longer turn.

Remove the lid from the oil fill on the external oil tank. The oil tank is on the drive side of the motorcycle, just behind the engine.

Pour your Dyna Wide Glide's recommended oil into the oil fill in the tank. After adding the first quart, add no more than 1/4 quart at a time before checking the level. The level can be checked by inserting the dipstick attached to the oil fill lid into the oil tank. Be sure that the bike is even for accurate reading. If necessary, have someone hold the bike perfectly upright while you check the reading.

Stop adding oil when the oil level reaches the lower mark on the dipstick. Screw the oil fill lid back on the oil tank.

Items you will need

  • Socket wrench

  • 5/8-inch socket

  • 3-inch socket extension

  • Oil drain pan

  • Replacement oil (less than 3 quarts without an oil filter change)

  • Oil drain plug O-ring

  • Liquid Teflon plumbers paste

  • Rag

 How to Change the Oil on a Harley Fatboy

Start the motorcycle and let it warm up for a few minutes. Warm oil will flow better and will help flush out any contaminants that may be present in the oil. Be sure not to let the oil get too hot to prevent burning yourself in the following steps.

Locate the oil drain plug and place your oil catch basin below it. The plug is under the right side of the motor.

Remove the oil drain plug using a socket wrench and inspect the drain plug's O-ring for damage or tears, replacing the O-ring as necessary. Set the drain plug aside.

Remove the oil filter with an oil filter wrench and discard the old filter.

Allow the old oil to drain until the flow has reduced to a minimal trickle. Replace the oil drain plug.

Fill the new oil filter with fresh oil, coating the inner lip of filter lightly with oil to provide a stronger seal before screwing the filter onto the motor. Tighten the filter by hand until it is secure.

Add your engine oil into the oil tank from the oil fill neck (where the dip stick is mounted).

Replace the dip stick and wipe away any spilled oil.

Items you will need

  • Socket wrench

  • SAE sockets

  • Oil filter wrench

  • 3 qts. 20W50 Engine oil

  • Oil catch basin or container

  • Towels or rags

  • Service manual (optional)

 How to Change the Oil on a 1979 Harley Shovelhead

Park the motorcycle in a well-ventilated area on its side stand. Start the engine and let it idle in place for three minutes, then stop the engine. Let the engine cool for another 10 minutes.

Remove the rider's seat from the motorcycle using a flat-head screwdriver.

Unscrew the oil tank cap from the left side of the motorcycle, located directly below the rider's seat. Loosen the oil drain plug, located at the bottom rear corner of the oil tank, using a socket wrench. Hold a funnel below the oil drain plug, placing the end of the funnel into a 1-gallon plastic jug. Unscrew the oil drain plug by hand and allow the oil tank to empty.

Wipe the oil tank drain hole clean with a shop towel, then screw the drain plug into place by hand. Tighten the drain plug to 18 foot-pounds using a torque wrench.

Unscrew the oil filter cap from the top of the oil tank, then pull out the oil filter assembly. Remove the D-shaped ring from the top of the oil filter assembly using pliers. Pull the upper washer off of the oil filter, then pull the oil filter element out of the outer filter housing.

Soak the oil filter element in a parts cleaning solvent until the element is free of debris and oil. Squeeze out the excess solvent, but do not wring it to avoid damaging the element.

Reinsert the element into the oil filter. Place the upper washer over the element and reattach the D-clip. Push the oil filter assembly into the oil tank and screw the oil filter cap into place.

Fill the oil tank with four quarts of 20W-50 Type-SF engine oil. Screw the oil tank cap into place.

Start the engine and let it idle in place for three minutes to circulate oil through the engine. Stop the engine and let the oil settle for another 10 minutes. Lift the motorcycle off of its side stand and into a level, upright position. Check the oil level by looking into the oil tank through its filler neck. Ideally, the oil must be 1 inch below the bottom of the filler neck. Add oil as needed to raise the oil level, or remove oil with a hand pump to lower the oil level. Screw the oil cap into place and lower the motorcycle onto its side stand.

Reinstall the rider's seat.

Items you will need

  • Flat-head screwdriver

  • Socket wrench and sockets

  • Funnel

  • Plastic jug, 1-gallon

  • Shop towel

  • Torque wrench

  • Pliers

  • Parts cleaning solvent

  • 4 quarts of 20W-50 Type-SF engine oil

 How to Do an Oil Change on a Harley Davidson Road King

How to Do an Oil Change on A Harley Davidson Road King

Locate the oil plug. It should be on the underside of the oil pan. Place your bucket or pan underneath it.

Remove the oil plug. Be careful when doing this, as the oil might be hot. Allow the oil to drain into the pan.

Remove your used crush washer, which is on the plug, and replace it with the new washer. The crush washer must be replaced during every oil change.

Wipe off the end of the oil plug. If this is not a brand new engine, be slightly wary of large slivers of metal.

While the oil is draining, remove the oil filter. Do this with an oil filter wrench. It should unscrew. When you get the oil filter off make sure that the o-ring (a rubber ring around the oil filter that ensures a proper seal) came off with the oil filter. If it did not come out, be sure to remove it.

Remove and wipe down the plastic mesh filter on the side of the engine case. Put this back in when it is clean. Wipe any sludge off the drain plug as well.

Take a bit of new motor oil and rub it on the o-ring of the new oil filter, to ensure a snug seal. Then, using your hand instead of a tool, screw the new oil filter into place. Using a tool for this can overtighten the oil filter and damage the o-ring.

Take a funnel and holding it at an upright angle, pour two quarts of the fresh oil in. Then let it work through the engine a bit. Screw the plug back in, turn your engine on and let it idle for a couple minutes. Finally, turn off the engine and unscrew the plug again, and using the funnel, pour the rest of the oil in, but don't overfill the oil pan.

Screw the plug back in and clean up any overflow.

Items you will need

  • A Harley Davidson Road King

    A Harley Davidson Owner's Manual

    Four quarts of quality motor oil

    A bucket or pan to drain the oil into

    A new oil filter (Be sure it is the right size for your motorcycle.)

    A new crush washer (Once again, be sure it's the right size.)

    A funnel

    A screwdriver or Allen wrench

    Clean rags

    Adjustable socket wrench

    Oil filter wrench

 How to Change the Oil in a 2005 Harley-Davidson Electra Glide

Start your Harley and go for a five-to-ten minute ride. If this is not possible, simply let the bike idle for five to ten minutes. This will allow the oil in the motorcycle to heat up and thin.

Pull your Harley-Davidson onto an oil change stand and lift the bike. Be sure the bike is extremely stable and supported.

Loosen the oil overflow bolt on the clutch side of the motorcycle using a 10 mm socket wrench. This will stop the vacuum effect in the oil reservoir and allow the oil to flow freely out of your motorcycle.

Slide an oil catch pan under the motorcycle and remove the oil drain bolt at the base of the clutch assembly using a 10 mm socket wrench.. Allow all the oil to drain out of the motorcycle.

Locate the oil filter cover next to the oil drain bolt. The cover is a circular piece of metal with a mounting bolt directly in the middle. Remove the mounting bolt using a 10 mm socket wrench.

Pull the old oil filter out of its housing and replace it with a new filter. Replace the oil filter cover and re-tighten the mounting bolt.

Replace the oil drain bolt.

Open the oil filler cap on the clutch side of the motorcycle and add four quarts of motor oil.

Replace the oil filler cap and tighten down the oil overflow bolt.

Items you will need

  • Motorcycle oil change stand

  • 10 mm socket wrench

  • Oil catch pan

  • Replacement oil filter

 How to Change the Oil in a 2001 Harley Road King

Motor Oil

Place your oil pan beneath the motor oil drain plug. The drain plug is located on the right side of the motor and to the rear of the frame. Remove the drain plug with a Torx socket and replace the plug's o-ring. Allow the oil to drain completely before reinstalling the drain plug.

Remove the oil filter with an oil filter wrench and discard it. Fill the new oil filter with fresh oil and spread a thin coat of oil around the filter's inner mating surface. Screw the filter into place on the motor by hand and wipe away any spilled oil with a shop towel.

Open the oil tank's filler cap and pour up to 3 qt. of fresh motor oil into the tank. Replace the filler cap and wipe away any spilled oil.

Primary Fluid

Place your drain pan under the primary cover drain plug. The drain plug is located directly under the round derby cover on the outer primary cover. Remove the drain plug with a Torx socket and replace the drain plug's o-ring. Allow the primary fluid to drain and replace the drain plug.

Remove the derby cover bolts and pull the cover off the outer primary cover. Pour up to 1 qt. of primary fluid in through the derby cover port, filling the primary until the fluid is touching the lower edge of the clutch diaphragm spring housed within the primary.

Reinstall the derby cover and wipe away any spilled fluid.

Transmission Fluid

Place your drain pan directly under transmission and remove the drain plug. Replace the drain plug o-ring. Allow the fluid to drain completely and reinstall the drain plug.

Remove the transmission's filler cap and add up to 1 qt. of transmission fluid.

Replace the filler cap and wipe away any spilled fluid.

Items you will need

  • Oil pan

  • Torx sockets

  • Socket wrench

  • Drain plug o-rings

  • Oil filter wrench

  • Shop towels

  • 3 qt. 20W50 engine oil

  • 1 qt. primary fluid

  • 1 qt. transmission fluid

 How to Change the Oil on a Harley-Davidson Motorcycle

Remove the filler cap from the oil tank.

Place the catch basin directly below the drain plug on the oil tank.

Hold a siphon between the oil tank and the catch basin. Some newer Harley models may have their own drain hose that you can use.

Use a socket wrench to remove the drain plug from the bottom of the oil tank, while continuing to hold the siphon in place.

Wait until all oil has drained into the basin, then screw the drain plug back into the oil tank.

Remove the seat of your motorcycle. Most Harley-Davidsons' oil filters are located in a cylinder under the seat.

Take the lid off the cylinder's housing and remove the cylinder.

Unlatch the clip that secures the cap on the cylinder using needle-nose pliers and lift out the used oil filter.

Replace the old filter with a new filter before locking the cap back onto the cylinder. Put the cylinder back into its home and replace the lid.

Bolt the seat securely back onto the Harley.

Pour the new oil into your oil tank. Your service manual should designate the proper amount for your specific motorcycle model.

Put the filler cap back onto the oil tank. Fasten it firmly to avoid a spray of oil.

Items you will need

  • Basin

  • Siphon

  • Socket wrench

  • Needle-nose pliers

  • Oil filter

  • Oil

  • Work rags

 How to Change the Oil in a 1999 Harley Softail

Level your bike. Locate the drain plug by following the oil line from the right side of the oil tank to the frame. The oil line is plugged by the drain plug on the underside of the frame between rear shocks. Place an oil drain pan directly beneath the drain plug and remove it with a socket wrench. Pull the dipstick to allow the oil to drain more quickly. Allow the oil to drain completely.

Remove the old o-ring from the drain plug and slip a new o-ring over the plug. Reinstall the drain plug--do not over-tighten--and wipe away any remaining oil from the area around drain plug with a shop towel.

Place the drain pan under the filter. Using the oil-filter wrench, remove and discard the old oil filter. Fill the new oil filter with oil and loosely screw it onto the motor by hand.

Remove the oil tank filler cap and add up to three quarts of oil into the tank. Replace the filler cap and wipe way any oil spills with a shop towel.

Start the motor and loosen the oil filter until a thin bead of oil begins to seep out from between the motor and the filter. Tighten the filter by hand and stop the motor. Wipe away any oil spills with a shop towel.

Items you will need

  • Oil drain pan

  • Torx socket set

  • Socket wrench

  • Oil filter wrench

  • Engine oil, 20W50 (3 Quarts)

  • Drain plug O-ring

  • Shop towels

 How to Change the Oil on a 2004 Heritage Softail

Start the Heritage engine and allow the oil to warm for five minutes. Turn the engine off. Place the catch pan under the drain nut on the bottom of the engine.

Remove the drain nut from the bottom of the Harley's engine using the ratchet set. Allow the oil to drain from the Harley's crank case and then replace the nut.

Turn the oil cap counterclockwise to remove it. Pour the 3.5 quarts of Amsoil Synthetic 20w50 engine oil into the crank case and replace the cap.

Remove the oil filter from the oil pump by turning it counterclockwise. Place the new Harley FLSTC oil filter onto the oil pump and turn it clockwise until it is snug.

Items you will need

  • Oil catch pan

  • Ratchet set

  • Harley-Davidson Classic Heritage Softail FLSTC oil filter

  • 3.5 quarts of Amsoil Synthetic 20w50 engine oil

 How to Change the Oil on 2007 Harley-Davidson

Move the Harley to a clean, level surface. Turn off the engine by placing the "Run/Off" selector into the "Off" position. Place the motorcycle in gear to reduce the risk of it moving accidentally.

Find the oil tank drain plug on the underside of the frame, on the right side near the swing arm to the rear. Slide a drain bucket underneath the plug. Use a socket wrench to remove the bolt, and allow the motor oil in the engine to drain. Replace the drain plug, and use shop rags to clean any oil that spilled on the floor, engine or frame.

Remove the oil filter which is located on the lower left, forward portion of the engine. Use the oil filter wrench to remove the filter, and allow any oil to drain. Remove the new filter from the box. Locate the black seal on the side that screws into the motorcycle; lubricate this seal by rubbing a small quantity of used motor oil into the seal. Install the new filter, using the oil filter wrench, and clean up any spilled oil with shop rags.

Remove the dipstick from the oil reservoir located on the right side of the motorcycle, near the seat. Add 3 quarts of motor oil to the reservoir. Check the oil level in accordance with your owner's manual. Add more motor oil if required.

Take your used motor oil and filter to an approved recycling center for disposal. Most auto parts stores serve as collection points. Contact the store first to ensure its collection facilities are available to receive used oil.

Items you will need

  • Drain bucket

  • 3/8-inch socket wrench

  • Shop rags

  • Oil filter wrench (No. 42311)

  • Oil filter (Part No. 63731-99A or 63798-99A)

  • 4 quarts motor oil (SAE 20W50 or SYN3 synthetic)

 How to Change the Oil in a 2001 Harley Davidson Fat Boy

Warm up your Fat Boy motorcycle's engine. This helps warm and thin the oil to make draining it easier. Turn off engine after 10 minutes.

Access the Harley Davidson Fat Boy's oil plug. In the 2001 Fat Boy model, the oil drain plug is above the motorcycle's rear shocks near the bike's crossbar.

Tilt the motorcycle to its right side and position your oil catchment container under the oil plug.

Use your wrench set to unscrew the oil drain plug. In a 2001 Harley Davidson Fat Boy, you need a wrench that will fit a 1/4-inch screw.

Drain the oil. While oil is draining from your Harley Davidson, use the time to clean out the magnet and rubber ring positioned under the oil drain plug.

Remove and replace the oil filter after the oil has drained. Refill with 3 to 4 quarts of engine oil. Replace all parts, including the magnet, rubber ring and drain plug.

Check that the drain plug has been securely screwed in. Run your Harley Davidson's engine to circulate the new oil.

Items you will need

  • Container to catch oil Harley Davidson oil filter (Part #63798-99A) 4 quarts of engine oil Wrench set

 How to Change the Oil on a 1991 Harley Heritage

Motor Oil and Oil Filter

Mount the motorcycle on a service stand to hold it in a vertical position. Locate the oil tank's drain hose on the left side of the frame below the transmission housing. Locate the transmission fluid drain plug under the transmission cover on the left side of the transmission housing. Locate the primary fluid drain plug directly below the round derby cover on the outer primary cover.

Unscrew the oil tank's filler cap. Loosen the oil tank's drain hose clamp with a flat screwdriver and pull the drain plug out of the hole. Drain the oil into a catch pan. Clean the drain hose and its plug with a shop rag. Push the plug into the drain hose and tighten the clamp with a flat screwdriver.

Unscrew the oil tank's filler cap. Loosen the oil tank's drain hose clamp with a flat screwdriver and pull the drain plug out of the hole. Drain the oil into a catch pan. Clean the drain hose and its plug with a shop rag. Push the plug into the drain hose and tighten the clamp with a flat screwdriver.

Fill the oil tank with 3 qts. of fresh 20W50 motor oil. Screw the oil filler cap back onto the oil tank.

Start the motor and check for oil leaks at the oil drain hose and the oil filter. Stop the motor and tighten the drain hose's clamp or oil filter as needed.

Transmission and Primary Fluids

Unscrew the transmission's filler cap. Remove the transmission housing's drain plug with a T-40 Torx screwdriver. Drain the transmission fluid into a catch pan. Clean the drain plug's tip and the drain hole with a shop rag. Screw the drain plug into the transmission housing and tighten it with a T-40 Torx screwdriver.

Fill the transmission housing with 1 qt. of fresh transmission fluid. Screw the transmission's filler cap back onto the transmission housing.

Remove all three bolts from the primary's round derby cover and the primary drain plug with a T-27 Torx screwdriver. Drain the primary fluid into a drain pan. Clean the primary's drain hole and the drain plug with a shop rag. Screw the drain plug into the primary cover and tighten it with a T-27 Torx screwdriver.

Pour fresh primary fluid into the primary cover. Fill the primary until the fluid is just touching the bottom of the clutch basket on the inside of the primary cover.

Place the derby cover onto the primary cover. Tighten all three derby cover bolts with a T-27 Torx screwdriver.

Items you will need

  • Service stand

  • Flat screwdriver

  • Catch pan

  • Shop rags

  • 3 qts. 20W50 motor oil

  • T-27 and T-40 Torx screwdrivers

  • 1 qt. transmission fluid

  • 1 qt. primary fluid

 How to Do an Oil Change on a Harley Lowrider

Remove the oil tank filler plug by hand. Position the catch pan under the drain plug, which is located at the bottom of the engine cases.

Remove the oil tank drain with an Allen wrench. Inspect the drain plug O-ring for damage or wear. Allow the oil to drain fully.

Install the drain plug. Torque the plug to factory specifications for your year and model. Move the catch pan up and under the oil filter located in front of the engine. Clean up any residual oil around the drain plug with a shop rag.

Remove the oil filter with the oil filter wrench. Wipe the faceplate on the oil filter mount to remove any old oil and road grime and to ensure the old gasket did not remain stuck to the faceplate.

Lubricate the gasket on the new filter with some new oil. Spin the filter on, then tighten it hand tight. Wipe up any residual oil.

Add the appropriate amount of new oil for your year and model to the engine through the fill hole. Stick the oil tank with the plug/dipstick to check the oil level. Test run the bike, and watch the drain plug and filter for leaks.

Items you will need

  • Catch pan

  • Allen wrench set

  • Torque wrench

  • Allen driver set

  • Clean shop rag

  • Oil filter wrench

  • New oil filter

  • New oil

 How to Change the Oil in a 2003 Harley Davidson

Engine Oil

Locate the engine oil drain plug and place your oil catch pan directly below it. On most models, the drain plug is located under the right side of the motor, next to the frame rail. Sportster models are equipped with a drain hose that is connected to the oil tank instead of the motor. Remove the drain plug and allow the oil to drain completely. Clean the drain plug and replace the O-ring before reinstalling the plug onto the motor or drain hose.

Remove the oil filter with a filter wrench and discard it. Prime your new oil filter by filling it with oil and install it by hand onto the motor. Add up to 3 quarts of engine oil into the motor or oil tank.

Start the motor and slowly loosen the oil filter until oil begins to seep out from between the filter and motor--this will bleed out any air that may have been trapped in the oil system. Tighten the filter immediately and stop the motor. Wipe away any spilled oil with a shop towel.

Primary Fluid

Locate the primary drain plug on the motor's left primary housing. The drain plug is located under the round derby cover on the primary. Place your oil catch pan below the plug and drain the primary fluid completely. Clean the drain plug replace the O-ring before reinstalling the plug onto the primary housing.

Remove the derby cover and gasket from the primary housing. Pour fresh primary fluid into the primary housing through the derby hole. Fill the primary until the fluid is touching the base of the clutch diaphragm spring.

Reinstall the derby cover and gasket. Wipe away any spilled primary fluid with a shop towel.

Transmission Fluid

Loosen the transmission fluid filler cap on the motor to quicken the draining process.

Locate the transmission drain plug. The drain plug is normally centered on the back of the motor. Softail models place the drain plug between the rear shock absorbers. Place your oil catch pan beneath the drain plug and drain the transmission fluid completely. Clean off the drain plug and replace the O-ring before reinstalling the plug.

Remove the transmission fluid filler cap and slowly add up to a quart of transmission fluid through the filler neck. Replace the filler cap and wipe away any transmission fluid that may have spilled with shop towel.

Items you will need

  • Oil catch pan

  • Torx socket set

  • Socket wrench

  • Oil filter wrench

  • Engine oil, 20W50 (3 Quarts)

  • Drain plug O-rings (3 total)

  • Primary fluid (1 Quart)

  • Transmission fluid (1 Quart)

  • Shop towels

About the Author

This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more about It Still Runs, contact us.