QuadBoss Crankshaft Bearing Kit

When you're rebuilding the bottom end of your 1986-1989 Honda TRX250R, getting the crankshaft bearings right is crucial for smooth engine operation and longevity. This kit from QuadBoss uses Koyo precision bearings, known for their tight tolerances and reliable performance. These aren't just any bearings; they come with double-lip seals that have a PTFE contact area. This detail is important because it helps the seals tolerate dry start conditions, which can otherwise cause extra wear on your crankshaft pin.

Having seals that can handle those initial moments when oil pressure is building means less stress on critical engine components right from the first kick. This translates to a more durable engine build that's ready for the demands of your TRX250R. The kit is designed to fit right, making the installation process as straightforward as possible during your engine work.