95 Savage Backfiring

[scjones5678]

I bought a 95 Suzuki Savage a few months ago. It always backfired occassionally when I decellerate, but now that I installed an aftermarket exhaust, it sounds like gun fire when it backfires. I even started a horse-stampede yesterday!
I know I probably can't eliminate the backfiring, but is there anything I can do to decrease it?

[DrBob]

You will need to adjust your carb- backfiring is usually caused by the carb running too rich. Any carb problems will be exagerated when you open up the exhaust and reduce backpressure. Your float may be saturated with gas, making it sink and fail to properly meter the fule to the carb, or it may have a little hole in it, or it just may be out of adjustment.
You may also need to adjust your muxture screw, or swap in new jets into the carb, now that you have an aftermarket exhaust system. Before you make any adjustments, swap to a better flowing aftermarket air filter to get the most out of your exhaust mods: more air out means you need to let more air in.

[The Chad]

backfiring can also be caused by running to lean, the cylinder will missfire and you then get a large amount of unburnt fuel in the exhaust that ignights when it gets enough oxygen to burn from atmospher. When I put the aftermarket exhaust on my bike it backfired to, I increased the amount of fuel by 5% in bothe the mid and low end of the computer. Aftermarket, that has less back pressure does require more fuel, the lack of pressure nolonget helps to retain air fuel mixture in the cylinder during valve overlap.