Sport Bikes banner

TLR Backfires...

1 reading
5.3K views 12 replies 12 participants last post by  MobileSuit  
#1 ·
My Tiller has got some serious issues with backfiring. No matter how i slow down, It backfires and even shoots blue flames. Anybody know if that is normal?

:dunno
 
#4 ·
First of all, it sounds like the pops and flames are coming out of your exhaust pipe. That makes this an "after-fire." It happens when fuel gets into the exhaust and ignites somewhere in the exhaust pipe. It is usually just a sign of a rich mixture. It can also be cause by improper valve timing (exhaust valves stay open too long after the intake valves open). Emission controls can sometimes cause this when they get clogged, or old.

A little is perfectly normal; but if it is excessive you might take a closer look at the above mentioned issues.

Personally I absolutely love the sound! Few things sound as good as a sport twin popping on deceleration. The only downfall is you might burn, or blow, the packing out in your exhaust cannisters quicker.
 
  • Like
Reactions: velophile
#8 ·
put strait pipes on it and have fun:boink
 
#13 ·
I'm going to dissagree on it being normal. My TLR backfires like a gunshot right around 5k if I decel completely off the gas. I've heard the PAIR valve and leaking exhaust on the rear cylinder where it goes through the swingarm are two main causes. This winter I hope I can actually take it apart I'm going to check valve clearance, remove the PAIR valve, replace the exhaust gaskets and sync the throttle bodies. Hopefully that will get rid of it.