I haven't done any to it. I bought it like this, I wanted another motor so I could run it while I built up my stock 91 motor. The motor came from a guy who built his 250 into a drag bike. It has a new sleeve, new piston, port work and head work. He sold it because he bought a250r, building a trx250r was a lot easier with more after market parts available.

I talked with him about running 110 with castor 927, like I run in my 500. He said that would work just fine. We never talked about him running alky.

It shouldn't hurt anything running that mix, right? I know nothing about alky set- ups.