Glad to have joined the Tech Talk bunch, my name is Al. 1971 Commando 750 and runnin well. What is the popular word out there on this new USA methanol-laced gas we have to now buy and its effects on fiberglass tanks? Anyone want to weigh in on an SOP for winter storage? Rumor has it that the ethanol in fuel will rot the tank on the inside. My only thought is to drain the tank for the winter. Also have a 1773 Trumpet Tiger. Love to ride em! Thanks everyone for any reply/thoughts.

Are you referring MTBE or the E-10 ethanol being used now? Damaged engines caused by dissolved gunk from fueling with ethanol-10 (10-percent alcohol) gasoline, clogged filters and dissolving fiberglass fuel tanks are really affecting the boating industry and I would visit a large marina for some “real world” advice. The marina may have some advice about sealers. I have heard about people sealing their fiberglass motorcycle tanks, maybe the Caswell or the POR 15 people have a suggestion. It is my understanding that boat manufacturers (post 1980) have switched to ethanol-proof tanks, filters and fuel lines and newer fiberglass fuel tanks made of vinyl ester resins are not damaged by ethanol. Since we are only talking about a few gallons on a bike I would recommend draining the tanks at the end of the season. This will also prevent the idle circuit from being blocked with dried fuel. Fuel storage can be a problem and to prevent condensation that can cause engine problems or phase separation of the gas, boaters recommend filling tanks 95-percent full and adding a fuel stabilizer. If phase separation does occur with the E-10 gas and excessive water separating, get rid of that tank of gas — not just the water in the bottom. The water will stop or damage the engine. Remaining gas becomes a low-grade, low-octane gasoline, leading to engine damage or inefficiency. Hope this helps Dave

No message

No message