Back fire

[beazzer]

I have a 2003 spirt1100, it is back firing a lot , it has vance&hines pipes on it . Has anybody had a problem like this if so how did you resolve it , thanks for the help

[dernp]

Whenever you do a mod to a stock bike, the carbs need to be retuned as you are changing something that Honda engineers didn't plan on.
You are most likely running in a very lean condition.
Has the bike been rejetted? Stock air filter?
A little more info might help us help you.

[itzelectric2]

Yea... I put some sweet new straight pipes on my 03 750 spirit and a hypercharger...at first it back fired a lot too... especially as I let off the throttle. As a temporary solution I simply adjusted the idle speed, but as a more permanent solution I had my mechanic fine tune my jets... And you definitely need to rejet from stock....

Sent from my ADR6425LVW using Motorcycle.com App

[sgtsmestad]

May also want to check your vacuum lines. I had the same problem with my ride, and it turned out the lines were not hooked up properly.