Dirt Bike Bottom End Rebuild, CR250, Part 2

Rebuilding the bottom end of a bike is a big job, but having the right tools makes it a lot easier. The picture to the right are the specialty tools that I had to buy for the job. They include a case splitter, a clutch holding tool, flywheel puller, and a crank puller/installer tool. I purchased them all for around $150 from Rockymountainatv.com. The short video below shows how the flywheel puller and clutch holding tool are used. The other tools will be used later. The video should give a pretty good idea of the process of removing the parts to get to the crank and crank bearings. A basic bottom end rebuild includes replacing the crankshaft assembly and the main bearings and seals. Click the links below for part 3 where the case is split and the new parts are installed, and part 4, the before and after video!



PART 1!
PART 3!
PART 4, before and after video