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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
XR400 Top End
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[QUOTE="ochster, post: 88790, member: 17624"] TexXR, I believe the single best mod for these bikes, is a pumper carb. You certainly have to have some patience to dial it in, but it makes a huge difference. Aside from that the valve trains on these bikes are inhearently weak. A nice set of stainless valves, and a good valve job will only help. These items on a fresh bore, with no more than 10.5:1 comp. will make a huge difference. I have had problems with temp, and fuel when running higher compression ratios. The last couple kits I have been a help with, we used the 88mm 10.5:1 J&E piston kit (430). XR's Only sells the kit complete, pretty reasonable. My .02 [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
XR400 Top End
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