Dj683 i installed bub pipes on my 2000 yamaha 1100 now i have a bad back fire .shop installed jet kit.carbs have been synchronize still have a back fire. help!
I too had this popping back fire on my 2004 Yamaha 1100 custom.
Seems the AIS system is causing this.
This site has an excellent PDF file and instructions.
http://www.sloneservices.com/SilverBack/Other-Stuff/AIS%20Removal.pdf
There is also a simple way to block of the AIS without stripping it off the bike. Reversible too!
(Usually my first choice to see if the desired results are achieved.)
Good luck!
Loved my BUB pipes too!
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