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View Full Version : help jetting (400ex carb on 300)



SET THE STAGE
06-07-2007, 10:50 AM
this thing is turning out to be about a ***** and a half. the owner before had been running it lean, so i figured i'd jump it up a few mains and see if that helped... nope. so i tried a new pilot.. nope. tried another pilot.. nope haha. messed with the needle.. still nothing better.

it's weird too because it's like running lean on the bottom (which should be the pilot) and rich on the top (which should be the main). so i'm just going to drop it off to the shop with all my jets and let them deal with it. so when i go from like no throttle to about 3/4 it bogs to where it almost dies? but yet it backfires, too.