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
Nov 8, 2008
Dirt Bike Bottom End Rebuild, CR250, Part 2
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your a life saver for having this
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