played with the jetting, but noticed it seems to cut out when punching it for high speeds. I thought I had it when I leaned my main jet to a 380 from a 400, but seems to come back after it gets warmed up......any ideas?
Is it a sporatic spark interuption that occurs at any throttle position above engagement RPM? If so the the Trottle Safety Switch is the likely culprit. You will need a bypass plug to test that possibility. There should be a three prong plug near the base of the handle bars and you need to jump the enclosed connector to the center exposed connector. This will permit you to operate the sled, but the kill switch will not work. Give that a try.
Found a possible somewhat pinched fuel line to the 1 carb. I noticed that side was running lean. Seems to be alot better. It does not seem to get worse anymore the longer you drive it.
I am getting a small "cutting out" still. (not a bog) Just seems like it is not getting enough fuel. I have noticed when I turn the air-fuel screw in, it gets worse. I have it at 2 turns out and will see what it does.