Sam499 Posted November 24, 2016 Share Posted November 24, 2016 Hi, was wondering if it is possible to fit a YZ426 engine of the same year onto a WR426, both 2001 models. I know their is a slight difference in cam timing and gearbox but is their anything else that could cause issues? Thanks Link to comment Share on other sites More sharing options...
blackhat250 Posted November 24, 2016 Share Posted November 24, 2016 As with any retro fit, exhaust mounts /route, and engine mounts are the big point, Link to comment Share on other sites More sharing options...
fabiostar Posted December 3, 2016 Share Posted December 3, 2016 it should be a straight fit, they are the same engine with a few internal changes thats all. Link to comment Share on other sites More sharing options...
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