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Dirt Bike Brands - Other
XR75ko engine HELP!
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[QUOTE="HiG4s, post: 153907, member: 22165"] They should be .004 intake and .006 exhaust. Small XR/XLs are known for running real poor after heating up if the exhaust is too tight. They heat up, expand and don't fully close. I actually run my son's XR100 at .006 in and .008 ex. They rattle a little until it warms up but then it runs great. I wouldn't reccommend running them that loose unless you plan to check them frequently. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
XR75ko engine HELP!
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