The most important thing when servicing your crankcase is cleanliness and organization. The easiest way to keep your parts cleaned and organized is to wrap each component in a towel when not working on them.
Transmission & Internal Shift Mechanism Specifications For Your 1997-2001 Honda CR250 Dirt Bike.
Engine Bottom End Specifications For Your 1997-2001 Honda CR250 Dirt Bike.
How To Remove And Dissasemble The Crankcase On Your 1997-2001 Honda CR250. Set up your bike, so it’s as sturdy as possible; you may need to get aggressive during removal. Bottom End Removal: You have three bolts attaching the bottom end to the frame, two mounting bolts, and
Inspecting your transmission is not a hard job, but it does require cleanliness, organization, notes, and math. There are a lot of numbers to record and calculate, which would be very hard to follow in a video, so this video is going to be an overview of the transmission service.
Changing the bearings is very easy; all your time will go into preparing the cases. These bearings are an interference fit, meaning the outside diameter of the bearings is slightly bigger than the inside diameter of the bore. The only way you can remove and install these bearings is by changing their sizes. Interference fit
Before you begin, double check all mating surfaces, and use new gaskets, O-rings, and dowels. Give every bearing a coating of 2-stroke oil, and tape the splines of the crankshaft and transmission. Right Case: Install the crankshaft on the right side first. Assemble your crankshaft puller, and tighten the nut until the crankshaft is completely