View Full Version : Popping!

09-12-2009, 12:55 PM
Hi guys just got hold of a 2 into 1 for my chop with the hope of curing a backfire / popping on decel, every thing fitted up fine but popping is still there.

Currently running a 2003 883/1200 conversion with forcewinder intake, #46 slow and 190 main jet, crane Hi 4 ( no voes ) 12 disc's in pipe, timing 28 deg advance (spot on ) no intake or exhaust leaks, And i live in England

Plugs look good, runs fine and pulls like a train from still, just can't stop the popping on decel.

Forgot to mention i did have pipe dreams inzomniacs before. basically open drag pipes, thought this was the problem but obviously not.

Any ideas guys before i rip out whats left of my hair.? :confused:

09-13-2009, 11:50 AM
To late sorted it! took carb off ripped out the old manifold rubbers and even though i had soaked the engine in wd40 / butane, they must have been the problem cos she now purrrrrrrs.:D

PS best set of pipes I've owned.

09-14-2009, 07:23 AM
Glad you got it figured out.
Might try adding a few discs also, get a bit more flow out of it.

09-14-2009, 02:32 PM
Must admit i could do with a bit more noise! what would you recommend disc wise to go with an open end cap.
Cheers :cool:

09-14-2009, 03:10 PM
try 6-8 w/open cap.