woodburnyq50 Posted May 3, 2013 Share Posted May 3, 2013 if i was to fit a 70cc big bore kit to my yq50, would i need to upgrade anything else for it to work properly? Link to comment Share on other sites More sharing options...
ahaywood93 Posted May 9, 2013 Share Posted May 9, 2013 you might need a different spark plug a hotter one and u would have to up jet the carb find what jet is stock and order the next few sizes up its pretty much trial and error from there Link to comment Share on other sites More sharing options...
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