99 XT600 Severe popping under acceleration
Last couple rides the bike has been popping severely through the carbs, starts around 3500 rpm and up and is getting worse, it pops five or six times each time I start getting on the gas and with each pop it momentarily kills the power, not like a fuel starvation bog but requires gearing down to get up hills, no popping on decelartion, bike starts and idles perfect, valve clearances are all up to spec, plug looks fine, compression is 159, fuel flow is good, I'm thinking it might be electrical since I dismantled/cleaned the carbs only 2500km ago when I installed a new top end. my question is if it's electrical which is the most likely part to cause this ? don't have a lot of cash so I'd really like to get it right, any suggestions are welcomed and appreciated !
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