stalteri Posted November 4, 2008 Posted November 4, 2008 Rode @ cold creek the other week and noticed a lot more popping when off the throttle in 2nd/3rd gear not fast-fast but trail speed, say down a slope. I noticed it last year but didn't seems as bad. I checked the valve clearance end of last year and all 5 where in spec tolerance. It does it @ Dumont and Amargosa as well. I also have noticed from day one that it seems to feel like it is, on/off/on/off or a slight stumble with very little throttle, but with f/t it is fine and has no bog. Anybody eles have this happen and what was the fix...PLEASE! -Tony Quote
White Rhino Posted November 4, 2008 Posted November 4, 2008 jetting :B my YFZ450 does the same thing. and ummm maybe the obvious (dirty air filter?) good luck Quote
stalteri Posted November 4, 2008 Author Posted November 4, 2008 jetting :B my YFZ450 does the same thing. and ummm maybe the obvious (dirty air filter?) good luck New twin air just installed last Feb and its clean. Quote
TheAlaskan Posted November 4, 2008 Posted November 4, 2008 deffinately your jetting. Rule of thumb to remember: Idle to 1/4 = pilot 1/4 to 3/4 = needle 3/4 to full = main Sounds to me like you might need to go up on your pilot jet Quote
stalteri Posted November 5, 2008 Author Posted November 5, 2008 deffinately your jetting. Rule of thumb to remember: Idle to 1/4 = pilot 1/4 to 3/4 = needle 3/4 to full = main Sounds to me like you might need to go up on your pilot jet Thanks TheAlaskan. I pulled the carb and the pilot jet which was #45 stock, will try a #48 and give it a try. Quote
motoxman30 Posted November 5, 2008 Posted November 5, 2008 yeah my 450 does that too especially when im goin down comp in a low gear i remember someone tellin me wut it was said it was nothin to worry about especially with the aftermarket pipe but idk wut kind of popping urs is makin so i cant make an assessment good luck with it tho Quote
BLUE STEEL Posted November 6, 2008 Posted November 6, 2008 Thanks TheAlaskan. I pulled the carb and the pilot jet which was #45 stock, will try a #48 and give it a try. That's a great start. If you still have problems after that. Try installing a NVCQ needle. I have no popping at all. Runs like a bat out of hell. Quote
EY3BA11 Posted November 6, 2008 Posted November 6, 2008 i rummaged thru my stuff and didnt have a 48.. smallest i got was a 55.. damn thirsty a$$ 500 lol Quote
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