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TOPIC: Re:Really scratching my head now? Forum Tools Post New Topic Show latest posts Rules

#93435 Si B (User) Fresh Boarder Posts: 63 Really scratching my head now? 6 Months, 3 Weeks ago   Ok so the story goes like this Cobra pipes ( the loud ones) K&N force charger filter ( the one that sits on the old air filter mount plate) Bought Dyno jety kit, fitted 180 main, needle jet on third space, turned pms screw 3.5 turns, all ok but on decell always get a slight backfire and its winding me up Any suggestions much apprecited   Logged     [img size=150][/img]   The administrator has disabled public write access. #93438 jetmechanic (User) If you don't ride,then you don't know! Expert Boarder Posts: 417 Re:Really scratching my head now? 6 Months, 3 Weeks ago   Is your AIS removed?   Logged       The administrator has disabled public write access. #93439 Si B (User) Fresh Boarder Posts: 63 Re:Really scratching my head now? 6 Months, 3 Weeks ago   Thats a good question, and tio be honest I dont know, will have a look when I get home Do the UK models have an AIS?   Logged     [img size=150][/img]   The administrator has disabled public write access. #93468 Si B (User) Fresh Boarder Posts: 63 Re:Really scratching my head now? 6 Months, 3 Weeks ago   Yep got ais   Logged     [img size=150][/img]   The administrator has disabled public write access. #93469 Heavy (User) If you're going to play - play to win! Senior Boarder Posts: 267 Re:Really scratching my head now? 6 Months, 3 Weeks ago   Odds are that's your problem.   Logged     Yes, as a matter of fact I DID have the right-of-way!   The administrator has disabled public write access. #93486 Si B (User) Fresh Boarder Posts: 63 Re:Really scratching my head now? 6 Months, 3 Weeks ago   Yep could be, but the thing is had no backfire at all had a 300 mile run no prob, ajusted pms then Ive started getting the problem?   Logged     [img size=150][/img]   The administrator has disabled public write access. #93487 markdyck (User) Loving the Roadie! Fresh Boarder Posts: 99 Re:Really scratching my head now? 6 Months, 3 Weeks ago   Hey Si B, if you've adjusted your PMS then I'd lay money down that your backfire is related to that. Check this article out in the tech forums and go from there. It explains how to dial in your PMS to the right setting to eliminate the backfire on decel.   Logged     Renai, my 2003 RoadStar!   The administrator has disabled public write access. #93492 Si B (User) Fresh Boarder Posts: 63 Re:Really scratching my head now? 6 Months, 3 Weeks ago   markdyck wrote: Hey Si B, if you've adjusted your PMS then I'd lay money down that your backfire is related to that. Check this article out in the tech forums and go from there. It explains how to dial in your PMS to the right setting to eliminate the backfire on decel. Yep thats what I thought just wondered if anyone else has same setup and reckoned 3,5 turns was too many/not enough, but got a day off tomorrow so will have a play, thanks for pointing me in the direction of that article   Logged     [img size=150][/img]   The administrator has disabled public write access. #93494 ratl (User) Junior Boarder Posts: 192 Re:Really scratching my head now? 6 Months, 3 Weeks ago   Si B. If you made adjustments to your PMS, there is probably some relation to that , however, be aware that the AIS injects air into the exhaust to reduce emmissions and can cause backfire if you use engine decelleration . That's a big reason why so many of us remove the AIS. In fact, if I recall correctly, the owners manuals state that you should just use your brakes to come to a stop without downshifting and decellerating with the engine. My two cents. Rich.   Logged     Black is faster? White is faster? Both must be faster together!!!   The administrator has disabled public write access. #93495 bowhunter4265 (User) Detroiter by Birth Eastsider by the Grace of God Senior Boarder Posts: 367 Re:Really scratching my head now? 6 Months, 3 Weeks ago   do not know about elevation Michigan is close to sea level... have the K&N air filter different pipes but use the 180 DJ main stock pilot 2.5 turns accel pump almost turned off so if you blip the throttle does not put too much gas in. after removing the AIS Hard decel pop almost completely gone adjusted PMS to 2.75 and you have to really be on a hard decel to get the popping and its not very loud when it does. Bike is about as lean as I would run it, get good gas mileage, HP & TQ are very nice. Cold blooded loves that choke (enrichner)til warmed up completely, if its pulling the cold oil from the tank or cold air in, it will sneeze out the carb if I have the choke turned off from low throttle accelerating.. but is perfect when warmed up.   Logged     Paul K&N, V&HPowershots   The administrator has disabled public write access.

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