Engine idles and runs normal until it warms up.Then idle starts to flutter up and down 500 rpm and lean pop a bit. Throttle up to 2500 rpms and it starts backfiring and sputtering terribly up to around 3500 rpms where it cleans right
up but will not rev over 7300 rpm. I have Checked and double checked crank case, carb boots, all hoses,exhaust bellows ===No leaks. Cleaned carbs ,gone up 2 sizes pilot jets,raised needles, lowered needles, Tried different ecm,
Don't know what else to try. Any suggestions appreciated.
up but will not rev over 7300 rpm. I have Checked and double checked crank case, carb boots, all hoses,exhaust bellows ===No leaks. Cleaned carbs ,gone up 2 sizes pilot jets,raised needles, lowered needles, Tried different ecm,
Don't know what else to try. Any suggestions appreciated.
