Hey guys. I just bored out my 1990 CR265 again due to my buddy melting the piston and rings to the cylinder. What a mess that was. Well anyways, it's now bored out to a 310cc. The guy that bored it out for me told me to run +4 richer on my main jet, slow jet, and on my needle clip. Well it started up and we broke it in for three days straight. After the break in we went to get on it and it just bogs at full throttle. Does anyone happen to have a CR310cc big bore kit and know what size the jets should be? Thanks guys.
well if its bogging at full t
well if its bogging at full throttle, then you need to go leaner on the main. or it could be that the carb isnt big enough. 310 is a big step from 250. 60cc's are a lot, thats almost the size of a small dirtbike engine you gained, the carb may just be too small
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