Author Topic: Exhaust Popping on Deceleration  (Read 1420 times)

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Offline TheKeystoneKid

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    • Mifflin County, Pennsylvania
Exhaust Popping on Deceleration
« on: August 27, 2015, 12:39:34 AM »
Hi everyone, I just recently bought my '78 XS500 and the previous owner did some mods to it, including giving it shorty mufflers that aren't too loud but they make a pretty bad popping noise every time I decelerate with the clutch not being pulled in. I've read that it might be a carb/jetting issue, but I'm not all that mechanically intelligent. Anyone know what my problem is and how to fix it? I don't have the original exhausts either.

Offline Garn

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Re: Exhaust Popping on Deceleration
« Reply #1 on: August 29, 2015, 08:41:12 AM »
Keystone, usually popping is a symptom of idle air/fuel screw need adjusting. Manufactures usually give the amount of turns out the screws must be. These screws are on the side of the Carb and have a small spring behind them. To adjust you turn them all the way in to met some resistance, then move them out the required number of turns.  This is hopefully your problem.

Next item to check would be your ignition timing.
Good Luck & RegardZ.
Kawasaki Z1, Z1A, Z1B, Z900-A4 and TX500A
    Sydney, Australia

Offline dankeller

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Re: Exhaust Popping on Deceleration
« Reply #2 on: May 25, 2017, 04:26:42 AM »
I also found that popping on decel can occur if your carbs are not synced properly.