Twin Spark 1150 Exhaust
- Thread starter David Nimrod
- Start date
Roger 04 RT
Registered user
The AFR is undoubtedly wrong. They are never that high.
Would fitting the standard silencer help..?
Or the Cat, or what..? Any advice please!
Cat back and a stubby, and one of John's chips
Roger 04 RT
Registered user
Would fitting the standard silencer help..?
Or the Cat, or what..? Any advice please!
Your AFR really isn’t that high. Dynos are notorious for showing absurdly high AFR. You’re fine as you are if the tech is set right.
What I just did to my 01 GS was install an O2, and an LC-2 (AF-XIED). Then later added r1200 injectors. The AF-XIED adds torque and the r1200 injectors smoothed things out further.
https://advrider.com/f/threads/1200...d-1150gs-vrooom.1181054/page-39#post-35850132
Thanks for the info, and I’ll read up over on Adv Rider
Run well with a Y Piece and stock chrome GS Exhaust - some say the best set up
I personally prefer the Cat and a road legal Remus can and have just gone back to that from a Y Piece and stock can
I personally prefer the Cat and a road legal Remus can and have just gone back to that from a Y Piece and stock can
Roger 04 RT
Registered user
David,
The change in AFR is likely due to a slight difference in initial conditions. In the first case it appears that the bike was recovering from Overrun Fuel Cutoff (deceleration with the throttle closed) and then a too-quick shift to WOT. the Fuel Cutoff drys out the normally wet walls of the throttle body and leaves much less fuel for the moment when the throttle is opened. This results in a lean AFR and low Power for a bit.
The change in AFR is likely due to a slight difference in initial conditions. In the first case it appears that the bike was recovering from Overrun Fuel Cutoff (deceleration with the throttle closed) and then a too-quick shift to WOT. the Fuel Cutoff drys out the normally wet walls of the throttle body and leaves much less fuel for the moment when the throttle is opened. This results in a lean AFR and low Power for a bit.
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