I have an 87 warrior that I'm trying to squeeze every bit of cheap power out of. I've got a straight baffle pipe, and a mikuni tm36-68 flat-slide pumper with a high flow air filter. I just got the carb dialed in just right and it rips pretty good, but i'm never satisfied [img]i/expressions/face-icon-small-tongue.gif[/img] I'm in Canada and we have no E85 but we have access to a 10% ethanol blend along with the usual 87, 91, 94. I was wondering if i used the 10% ethanol would i have to richen up the jetting or will it be fine? i have a rubber hose connecting the tank to the carb and i'm pretty i'm gonna have to change that, i've heard ethanol eats rubber. I was also thinking with the little bit of octane boost that the ethanol gives i could advance the ignition timing a little, maybe 4-6 degrees by lengthening the mounting holes in the stator and turning it. So if i run ethanol do i have to change jetting? and can i advance the timing? even if it doesn't give much power it's ok, i just hate thinking that i'm missing out on available power. Even if i blow it up that's ok too, i've had it for a LONG time and i'm surprised i hasn't blown up already hehe, if it happens i'll just put in a 400cc twin motorcycle engine.