Popping on new exhaust
#1
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I bought a fmf megamax II for my wheeler, and after finally sealing up a leak it had, it is still popping everytime I let off the gas. Ive messed around with the idle screw, but i dont know where the air screw is. I read that u should set both back all the way then turn them about 2 1/2 turns. Would this help? Im thinking about just sending it in to the dealership, but i dont want to spend the money for labor. Id appreciate any suggestions.
#2
#3
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I've read elsewhere on a motorcycle forum that 4 strokes backfire some - naturally. And yours may always did but with a stock pipe you did not hear it but with an aftermarket pipe with less muffle you may hear it now. This was from a pretty knowledgable mechanic on that forum ... and I found the same on my bike.
#4
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It is lean on the pilot jet or the air screw. Turn the air screw out a 1/4 at a time and see if it goes away. If it takes more than a turn, bump up the pilot jet one size.
On any Honda carb I've had in my hands, the air screw is on the bottom of the carb on the engine side of the slide. It should be almost flush and made of brass and require a flat screw driver.
On any Honda carb I've had in my hands, the air screw is on the bottom of the carb on the engine side of the slide. It should be almost flush and made of brass and require a flat screw driver.
#5
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I dont think it needs to be jetted since on the fmf web site it says it should run fine with stock jetting. I noticed today that it only pops at low rpm or when its rolling down a hill. Jokerguy, u might be right about hearing it more with the new pipe cuz it always did pop a little. This might be a really dumb question, but is the idle screw and the air screw the same thing? Ive been adjusting what the manual calls the idle screw.
#6
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Originally posted by: joelrichard50
It is lean on the pilot jet or the air screw. Turn the air screw out a 1/4 at a time and see if it goes away. If it takes more than a turn, bump up the pilot jet one size.
On any Honda carb I've had in my hands, the air screw is on the bottom of the carb on the engine side of the slide. It should be almost flush and made of brass and require a flat screw driver.
It is lean on the pilot jet or the air screw. Turn the air screw out a 1/4 at a time and see if it goes away. If it takes more than a turn, bump up the pilot jet one size.
On any Honda carb I've had in my hands, the air screw is on the bottom of the carb on the engine side of the slide. It should be almost flush and made of brass and require a flat screw driver.
#7
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Originally posted by: Honda1478
I dont think it needs to be jetted since on the fmf web site it says it should run fine with stock jetting. I noticed today that it only pops at low rpm or when its rolling down a hill. Jokerguy, u might be right about hearing it more with the new pipe cuz it always did pop a little. This might be a really dumb question, but is the idle screw and the air screw the same thing? Ive been adjusting what the manual calls the idle screw.
I dont think it needs to be jetted since on the fmf web site it says it should run fine with stock jetting. I noticed today that it only pops at low rpm or when its rolling down a hill. Jokerguy, u might be right about hearing it more with the new pipe cuz it always did pop a little. This might be a really dumb question, but is the idle screw and the air screw the same thing? Ive been adjusting what the manual calls the idle screw.
the fuel screw and idle screw are NOT the same thing. the idle screw will raise or lower your idle. the fuel screw will fine tune in the air/fuel ratio around idle to 1/4 throttle or so.
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