i have an 02 warrior with a 12:1 piston and now i am forced to run race gas. I have been thinking about maybe switching to alcohol but i am not very familiar with alky. Does anyone know what i will have to change in my 38mm mikuni ?

 

Big jets Way big and you will need to run out the alky after you get done riding add nipple to supply race gas to clear out carbs before storage and then you need to swap out your Motor oil after your done and you have to be eal carfeul with your alcohol when in storage it tends to draw water all in all it's a pain in the keyster . It does run cooler and you can get a lot more fuel into the combustion chamber verses race fuel . It's just a lot more work .
If you do switch over run a top cylinder lubricant and you can add some Nitromethane to increase combustion heat maybe about 6% nitro.
Read up on it ask around alot of circle track cars run methanol maybe they can give you some insight at a local level .
Good luck becareful and get a good fire extinguisher

 

He got it pretty much right. Simply put you need to increase the flow by 2 times, but that doesn't mean twice the size holes.

Do a bunch of google searches, and even search on here, the info is out there. There is more to it than just fuelling up and going. The search for the info will help you to learn about it.