senf2 Posted December 30, 2010 Report Share Posted December 30, 2010 Hi, does anybody know the difference between the 4rt and crf250 engine? cylinder-head, drivedrain.... Quote Link to comment Share on other sites More sharing options...
bobtlr Posted December 30, 2010 Report Share Posted December 30, 2010 gears are different bore and stroke are not the same camshaft and flywheel are different best regards bob Quote Link to comment Share on other sites More sharing options...
leanin Posted December 30, 2010 Report Share Posted December 30, 2010 The head is different also. The valve adjustment for the crf is shim under bucket. The 4rt uses threaded adjusters. Quote Link to comment Share on other sites More sharing options...
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