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XR600 big bore questions
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[QUOTE="SFO, post: 565931, member: 21864"] It seems like there are a few objectives here. One is to rebuild a tired xr, another is to go 100mph, and also have it run on pemex. My experience with high mileage xrs that have been raced or spun hard has them with stretched rods or ovalized small ends. If you want to build a 100mph bike I might consider a carrillo rod as cheap insurance before going any further. I also might keep an eye on cycle news for some used parts or nos hrc parts for your bike. There are a lot of different ways to build these motors, but given your parameters, I would consider keeping the stock bore and building a good head add a good rod and put a spinner cam in it. I know Rich has built a few of these too and there are a million recipes. I think it could be a can of worms to just add a big bore kit to a tired xr and go thrash it in baja expecting a 100mph ride, not that it couldn't be done, but I would have some serious reservations. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
XR600 big bore questions
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