Quote:
Originally Posted by Triple Jim
Watch out for the jets in the carb kit. If they're not genuine Keihin parts of the same size numbers, they're likely to cause more problems than they cure.
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^ What he said!
Don't change out the oem jets for ones in the kit unless there are major problems, even then I'd probably order oem jets. Resist any urge to go bigger on the jets - it's not necessary and will also cause problems.
Clean everything extremely well, and check all passages.
This section has some info that may help get it right the first time -
https://faq.ninja250.org/wiki/How_do...n_the_carbs%3F