Quote:
Originally posted by BikeSwimLaugh
To review: stock 400EX HMF slip-on exhaust and K&N air-filter and I just re-jetted from the stock 148 to a 152
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it went from idle all the way to about 85% wound-out, but then it starts to hesitate and it won't wind-out all the way. Again, the low & mid are great, but once I get into the top-end it just doesn't want to pull all the way. I'm guessing lack of fuel and I need to jet-up to a higher number?
Some help please.... :)
Yes I think you are on the right track considering a different main. I would try one size larger (154) to see if it helps. If not then go one size smaller (150) and see if that helps. Whichever direction makes it better, try going one or two more sizes in that direction 'till you've found the one that runs best at WOT.