Originally Posted by MotorBicycleRacing
Total nonsense that one of these motors will not run on straight gas with no oil added. They will run for quite a while before the piston seizes in the bore.
over the last 6 years, I've had about a dozen folks that bought a bike off CL & didn't know it needed oil in gas - every one had the 'tighten up & stop after a few seconds' symptom, after a small time it would start again & stop and continue doing that
in the case of straight oil, it usually didn't even start, but checking compression showed something north of 175 pounds which meant it was full of oil