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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
CR450F Top End Update
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[QUOTE="Ol'89r, post: 394215, member: 17212"] Eric. Do you think it would be a good idea to machine a set of silicon bronze guides for the CRF head? We ran those on our old flat track engines. They came stock with cast guides and it only took one missed shift to destroy a head. With the silicon bronze guide, you could bend a valve and nick the piston but they didn't shatter. On our own racing engines we would pull them down every 2 races to do a topend and every 4 to 6 races on the bottom end. Of course, we didn't have the money to do a complete rebuild after every race like the factory teams. We re-used many of the old parts, but had them tested and treated each time using Magnaflux and Zyglo testing proceedures and then had them shot peaned. Today, there are better testing and treatment proceedures available. I would think this would be a better way to go instead of just replacing everything. But then, what the hell do I know???? :confused: [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
CR450F Top End Update
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