madmax6x9 Posted October 5, 2005 has your crf250r ever blown up? also how much do you check and rebuild the top end.if not how much are your valves usally out of spec? thanks. Share this post Link to post Share on other sites
Bodyman Posted October 5, 2005 Use the search feature for tons of reading on this stuff. Did your CRF Blow Up? If you are anal like some of us you check your valves every time you ride it. All I can say about the specs are that if they were checked when new and they have moved .002-.003 then they are toast, shim them and order new ones before the big blow up.... Share this post Link to post Share on other sites
