Backfire problem on decceleration and at idle

[Tom Graham]

FIX IT!

When you put the new tank on the bike you probably knocked loose a bit of debris in the fuel system. One (or both) of your idle jets are partially blocked. The slow idle and popping exhaust are both indicators.

Remove the mixture screw. Spray carb cleaner inside to blast the jet blocking dirt back to the float bowl, spray more than once. Drain the bowl through a clean paper towel to catch the dirt so you can see how little the speck is (provided the dirt is black). Wear safety glasses because the spray will come back out and blind you!

I found this is the easiest way to clean a blocked idle jet with an otherwise clean and working carb and have used the method on mnay bikes.

Tom Graham

[grizld1]

That's entirely possible, Tom, particularly if manufacturing debris wasn't flushed from the new tank before installation. It's also possible that questionable connections made by the PO in installing the aftermarket ignition were disturbed in removing the tank. There's no need to SHOUT about your panacea; we'll get there.

[Tom Graham]

" There's no need to SHOUT about your panacea; we'll get there." :^)

All in good fun.

Tom

[pamcopete]

Tom,

I think you got it. I had something similar happen when I just changed the fuel hoses. Crud collects on the inside of the hoses and when you disturb the hoses it breaks loose and gets into the carbs. Your solution is also one that I have done and it works.

[kassrocket]

Ok.. Ill check all those things and get back to ya..

Cheers all.. Certainly hope its an easy fix such as small debris..

Josh