Yes - at least for my Robin 35cc that's the truth
when I first started riding my MB I asked the manufac
which octane to use
their reply was
regular OF COURSE !!!
makes it best when we ride that thing Mountainman
Mine is a Robin-Subaru EHO35 also....
You don't run straight Race Gas because the ignition point is higher than regular gas,,,mix it 50/50 and you'll get smooth running and easy starts.
I easily top 30 MPH with a 1 inch roller,,and I'm over 200 pounds.
And I can run nearly 30 mph against a steady head wind.
Use Lucas synthetics 5w-20 in the crank case and it will keep cool and clean.
Sometimes I see another guy with my same engine and I easily pass him because he follows the manufactures suggestions and uses the low quality, regular gas from the pump and 30 weight oil...his engine smokes and burns oil and can not get above 27 MPH.
Now since he's been using the cheap oil and lousy gas for so long,,,he can not use clean synthetic oil in his crank case because of the carbon build up on the head,,,,,the spark plug would fowl because the synthetic oil will dissolve the carbon build up.
Scan my thread for some useful tech tips,,on oil, gas, tires, fuel tank, lights, fenders...and some good YouTube vid links to help you work on your engine............G61
http://www.motoredbikes.com/showthread.php?p=123907#post123907