Re-Jetting the carburettors

[wezdavo]

My understanding on the pops on overrun is caused because closing the throttle is putting the carbs into the idle (pilot) circuit which doesn't  supply enough fuel to match the engine speed, a standard exhaust combats this with back pressure which slows down the flow so the pops arnt heard??

I don't think a engine running lean on overrun is anything to worry about because its not under load...

Best way to check if your bike is running lean is to check the plugs..