1998 Yamaha Big Bear 4X4 Specsby Brianna Collins
Yamaha has been in the business of manufacturing motors and recreational vehicles since the 1950s. Since that time, the company has also offered ATVs (all-terrain vehicles) intended for sport, utility or speed. Designed for durability and strength, the Big Bear make falls into Yamaha's utility category of ATV. The 1998 4X4 model came with all-wheel drive and an engine made to withstand hard work.
The 1998 Big Bear came equipped with a four-stroke, air-cooled engine with a single, forward-inclined cylinder. It had a bore and stroke of 3.27 and 2.54 inches respectively, and a compression ratio of 8.6-to-1. The motor also featured an electric recoil starter, a wet sump lubrication system, a wet-type element air filter and a wet, centrifugal automatic clutch.
Transmission and Chassis
The '98 Big Bear featured a constant-mesh, dual-range transmission with five speeds moving forward and one speed in reverse. It was operated with the left foot, and the 4x4 model had four-wheel drive. The ATV also featured a steel-tube frame with a 2.5-degree caster angle and a trail of 0.59 inches.
Brakes and Suspension
The Big Bear featured drum brakes in both front and rear. They were operated by the right hand in the front, while the brakes in the rear were operated with left hand and right foot. The suspension system up front was a double wishbone system with a swingarm suspension in the rear. Both front and back also featured oil-damper, coil spring shock absorbers.
Weighing in at 476 pounds wet, the '98 Big Bear measured 75.4 inches in length, 45.9 inches in width and 44.5 inches in height. The ATV had a seat height of 33.5 inches, a wheelbase of 47.6 inches and a ground clearance of 7.1 inches. The gas tank could hold 2.6 gallons with a reserve tank of 0.3 gallons.