One reason I decided to prep a Yamaha ttr250 for the backroads of the NW USA was lack of quality gas I often encountered while riding my KTM 500. I carried octane booster for the 500 and so far I don't think the engine has suffered, but for sure 87 octane fuel runs like crap in the KTM. I am hoping the ttr250 will be more tolerant of the low grade gas ? So what kind of experience have the ttr owners had with that issue.
I'm betting It'd be fine. I run 91 octane and it goes perfectly. In fact I think it performs better and gets slightly better mileage with 91 than 98 octane.
