Hign-concerned Chemical : None is_customized : Yes Material : Bearing Steel Model Number : 14x25.4x6 mm Brand Name : FUSHI Origin : Mainland China Certification : None Bearing Specification: Inside Diameter: 14 mmOutside Diameter: 25.4 mmWidth: 6 mmABEC Rating: ABEC 3/P6Bearing Material: Chrome Steel 52100Ball Element Meterial: Steel BallsRetainer Material: Polymite Nylon T46Radial Play: C3Speed RPM: 38000Working Temp Deg C: 135Balls: 9 PCSWeight(g): 10 Structure: Advantage: Engine Bearings with Re-enforced Nylon (Polymite )Cages.This special design can withstand higher load than normall,re-enforced cage can use on higher speed and heavy duty.This bearing is an open design to allow the oil from the fuel to keep the balls well lubricated. Maintenance: Tips: Diagnosing: If you hold the head of the engine with your hand and a rattle sound dissapears then you have a worn out rear bearing. The risks/issues of a bad rear bearing are not holding a tune, crank can get worn, and worst of all the bearing comes apart and eats your piston/sleeve.Installation: The best way to install is to use a bearing puller/installer, OFNA makes a very affordable one. If you place the new bearing in the freezer for 15 minutes it will be easier to install.Positioning: For proper lubrication, face the open side where you can see the balls to the rear of the motor (not the clutch side).Break In: For the first run of these bearings, We suggests that you fatten your motor up on the high-end needle so the ceramic balls will seat instead of skidding them. window.adminAccountId=110002693;