the backfiring saga continues help!!!

[greatwhiteshark]

well if you didn;t read previous thread it's not very far down the list . So after getting advice from some of you I phoned the bike shop to tell them not to do the compression test , too late they already did it but didn't charge me for it . so definately no burnt valve now they are saying that the mechanic tried adjusting the fuel / air mixture on the no. 3 carb but no matter what he did it made no difference to the way the bike ran or to the backfiring .So now he figures that one of ( I can't remember what he called it ) but he described it as a small hole that air passes through and it is a part of the carb body itself has corrosion inside it and that even though they can get compressed air to go through it when the bike is running the air will not pass through this hole. They are saying that I should get a new set of carbs and they will put all of the parts from my old carbs into these and see if that makes the difference . Now I do happen to have an extra set of carbs that I got with the bike, and the shop says they will do all of this for no charge but I want to know if this sounds at all familiar to anyone out there or are these guys simply baffled and don' know what they are doing . this whole situation is getting very frustrating and I don't know what to do......thanks....mark

[Bikeboy]

Hi Greatwhiteshark...

I say if they want to do this work at no charge, go for it. If this is a true motorcycle shop and not a hole-n-the wall, then I whould let them do the work. You should be able to talk to them and tell if they know what their doing. Considering they want to do the work for free,it sounds like their trying to take care of you. They must be pretty good guys. Wish I had a shop around here like that.

[scalded dog]

Shark, I have triple cleaned carbs, checked, fixed, and double checked, pic up coils, swapped out coils from another bike, changed out cdi, changed out carb boots, adjusted floats, blowed the sutt out at excessive speeds, fully charged batteries, cleaned electrical connecters, I still have a little backfire on low speeds or deceleration as well as a little stumble on acceleration, please let me know about this little hole, if your shop figures it out. TIA. Later 'Dog

[POOLBOY]

As Charlie Brown would say

AAAAAAAAAAAAARRRRRRRRRRRRRRGGGGGGGGG.

[xssiveone]

Re: the backfiring saga continues help!!!

Originally posted by greatwhiteshark
now they are saying that the mechanic tried adjusting the fuel / air mixture on the no. 3 carb but no matter what he did it made no difference to the way the bike ran or to the

Sounds like you might have a broken tip on your idle mixture screw. Check here for more information: Broken tip removal