My new used 2008 Vision has the Stage 1 upgrade. It backfires occasionally. Is this due to a rich gas mixture or a lean gas mixture? Should I take it in to reflash? I run premium 91 octane.
I'm hearing it through the pipes, so I figure it is the pipes. Rich running may make sense, cuz if you idle, I think it's loading up with too much fuel.Are you talking about backfiring (which is thru the carb) or exhaust popping (thru the pipes)? If its the latter, you may be too rich. Or you "chop" the throttle between shifts. Try being a lot easier with the throttle and make less movements when shifting.
Disconnecting the O2 sensors and installing the Lloydz adjustable idle air valve will help reduce exhaust popping. I had some explosive popping and the above, along with the Lloydz adjustable timing wheel, has all but eliminated it.I'm hearing it through the pipes, so I figure it is the pipes. Rich running may make sense, cuz if you idle, I think it's loading up with too much fuel.
Will give that a try. It's not continuous or every ride.when shifting "don't" close the throttle all the way to the stop.
Other wards try doing a mild speed shift. Closing the throttle all the way cause it. We have a poor vacuum system that doesn't respond fast enough
I left my Kingpin stock and it was quiet and never had a backfire. Not a bad idea. I had thought about undoing the Stage 1 if anyone had the stock pipes. Will try a few of the other suggestions. Didn't have a single backfire this morning. I ran a little SeaFoam through and that probably wasn't helping the situation.This is why I am contemplating keeping my exhaust stock . I realize its ultra quiet but I can not stand the popping .
With a Power Commander and adjustable IAV you can get rid of all of it... if you know how.I have the timing wheel from Lloyds and gasket that HC posted , and the 1/4 turn throttle ring I may install soon . My Hammer sounded like a beast , and I loved it , but would always let off a gunshot at the worst possible time , making it sound like a crap can . I loathe this . I plan on having this bike for a very long time , and can make a plan for this slowly and methodically . If I do it , it must be done right the first time . Its upsetting that even if you shell out 1000.00 for the tri ovals or such from MA VIC , the guys say they still get popping ....
Nah! You are still young bro. Step out and give it a go!This is why I am contemplating keeping my exhaust stock . I realize its ultra quiet but I can not stand the popping .