Good day!. This is a question regarding a better oil to use in this vintage scooter/moped/bike. 1970 50Cc 2 stroke 3 speed manual. mileage reads 389 miles, with 240 miles being put on in the last couple weeks.
As of right now, im using the FACTORY OEM 2 cycle OIL FROM 1970's. This bike has 2 tanks one for the gas, one for the oil. The oil tank is about 1.5 QTS. I also use 2OZ MMO/Per gal of 93. The engine is spotless. just removed the head yesterday, zero carbon on piston - with the arrow even visible, no carbon on the head, no piston play, no scoring, great comp @ 130.
Now the reason i ask this, is i was out on a midnight cruse, and about 30 miles in of mostly 3/4 throttle or more, right as i was pulling on to my 2 mile long dead end road, the engine started to sound really bad, like a mower running with out oil, i thought the piston was going to explode. power was still fine, i just drove it super easy and made it home thinking the engine just checked out. the next morning, i get up, disassemble the engine, and yes EVERYTHING is perfect? zero carbon on piston - with the arrow even visible, no carbon on the head, no piston play, no scoring, great comp @ 130. Starts right up first kick, and runs perfect with no engine sounds...
Now im thinking the engine got to hot, and the old oil could not "stick" to the metal parts, and it basically was over heating.. Or maybe the sparkplug is too hot, and the fuel was being burned before the spark could ignite it. Should i try a next cooler plug? The current spark plug reads a tan color.
What is a good 2 stoke oil to use? I usually just buy the 1 gallon 40:1 mixes at the gas station if i need any for the chainsaw or weedeater. But being this bike will be used ALOT more, and at or near WOT, and will also have engine braking going down hills, and running for extended periods of time, Whats a better choice for 2 stroke oil? Thanks!
As of right now, im using the FACTORY OEM 2 cycle OIL FROM 1970's. This bike has 2 tanks one for the gas, one for the oil. The oil tank is about 1.5 QTS. I also use 2OZ MMO/Per gal of 93. The engine is spotless. just removed the head yesterday, zero carbon on piston - with the arrow even visible, no carbon on the head, no piston play, no scoring, great comp @ 130.
Now the reason i ask this, is i was out on a midnight cruse, and about 30 miles in of mostly 3/4 throttle or more, right as i was pulling on to my 2 mile long dead end road, the engine started to sound really bad, like a mower running with out oil, i thought the piston was going to explode. power was still fine, i just drove it super easy and made it home thinking the engine just checked out. the next morning, i get up, disassemble the engine, and yes EVERYTHING is perfect? zero carbon on piston - with the arrow even visible, no carbon on the head, no piston play, no scoring, great comp @ 130. Starts right up first kick, and runs perfect with no engine sounds...
Now im thinking the engine got to hot, and the old oil could not "stick" to the metal parts, and it basically was over heating.. Or maybe the sparkplug is too hot, and the fuel was being burned before the spark could ignite it. Should i try a next cooler plug? The current spark plug reads a tan color.
What is a good 2 stoke oil to use? I usually just buy the 1 gallon 40:1 mixes at the gas station if i need any for the chainsaw or weedeater. But being this bike will be used ALOT more, and at or near WOT, and will also have engine braking going down hills, and running for extended periods of time, Whats a better choice for 2 stroke oil? Thanks!