Taking it off has no effect on horsepower at all. But it does indeed help reduce the backfiring, and also improves the sound of the exhaust. And yes, it cleans up the top of the jugs, and makes it much easier to do valve jobs and other maintenance or repair work.I've had two or three dozen guys come in with a backfire problem, and fixing it always involves the same thing:1. Turn the throttle all the way closed when you decelerate.2. Remove pair valve3. Use a fuel controller to richen the mix a little in the idle range to lessen lean overrun, or even better, install a PC3 and get a custom map made for your bike.#3 isn't always needed. Some bikes do, some don't. Some exhaust systems provoke backfire more than others.Be warned - a few of the maps people are circulating around attempt to fix the backfire by drowning the cylinder in gas - to the point combustion is extinquished. Bad idea.
Quote from: Tapper on May 01, 2006, 01:40:26 PMTaking it off has no effect on horsepower at all. But it does indeed help reduce the backfiring, and also improves the sound of the exhaust. And yes, it cleans up the top of the jugs, and makes it much easier to do valve jobs and other maintenance or repair work.I've had two or three dozen guys come in with a backfire problem, and fixing it always involves the same thing:1. Turn the throttle all the way closed when you decelerate.2. Remove pair valve3. Use a fuel controller to richen the mix a little in the idle range to lessen lean overrun, or even better, install a PC3 and get a custom map made for your bike.#3 isn't always needed. Some bikes do, some don't. Some exhaust systems provoke backfire more than others.Be warned - a few of the maps people are circulating around attempt to fix the backfire by drowning the cylinder in gas - to the point combustion is extinquished. Bad idea.Tapper,My bike has decel popped/backfired since shortly after being brand new and stock until today with desmog, GP blank off plates and vance and Hines big shots.The PC3 sitting in the living room hasn't help it either. That's next.My deal is I sort of like the sound of a slight decel pop. Reminds me of riding with my big brother in his 69 ford pick-up with a tee welded in the exhaust and the cap off. Does the decel pop hurt anything?I'm going to do the PC3 anyway for gas efficeincy and performance but I wanted to wait until I could get a dyno along with the install. Havn't seen where Johnny Cheese is back in business so I guess I'll take it to LAKE CHARLES after the rally.
I sure wish Johnny would check in and catch us up. Haven't heard boo from him in quite a while...
