ds450
02-28-2008, 06:41 AM
Im working on my friends 400ex and it doesnt seem to be jetted right. He bought it like this. It has a 440 kit, oversized valves, stage 3 cam, yoshi exhaust, rev box, no air box lid. The person before him installed a keinin FCR 39mm carb for the 400 and im not sure about where I should start the jetting to get it right. It has a 168 main in it. I saw on here that somone had a 185 in their flat slide carb on a 400ex.
Can anyone tell me about where to start the jet sizing? Thanks
Can anyone tell me about where to start the jet sizing? Thanks