Rode well for first ten miles then it spit and sputtered. Changed the plugs and it ran slightly better. My brother took it out the following day for six hours and it ran great for him. He filled it at the same gas station I used and parked it. I took it out the following day and it was the same story. Ran good for half the trip then spit and sputtered the final miles. Is this a bad gas issue? Or should I look for other causes?
power valves not working??
Clean carbs. Check TORS. Check for wire rub thru.
YAMAHIZAL700
New member
power valves wont make it sputter, it just wont perform quite as well. I bet its 50/50 tors kicking in or more likely rub through.