Its a little more involved than just jetting your carb for alky.
Alky will use about 2-3 times the fuel, Main jets +250 and pilot +80. You shouldn't have a hard time finding a carb set up for alky. The 5hp based Brigs and Straton Junior Dragsters have be running Alky motorcycle carbs for years and make good HP.
You will need about a +15:1 compresion ratio and advance the timing about +10*
Alky in extremely corrosive you will need to drian the fuel for the carb when the bike is not in use. Lot of maintenance.
dont bother trying to buy jets buy a numbered set of drill bits and a handfull of regular jets ps if you buy a tm 28 i can get you the info you need for jetting i used to race jr dragsters we ran those on a small motor we ran 44mm pumpers on our BIG motors
i ran 2/3 high octane gas and 1/3 40% nitro rc car gas in my xr100. it was definately interesting. i never had it tuned amazing tho. i just threw the biggest jets i had in and it was definately quicker. i did tune it a bit but not as much as i should have.
u will need a bigger transfer tube also u might run a power jet (tube siphons fuel from bowl ) not at that point yet but will be doin this myself next year for a flattrack pit bike let me know how it goes
If you haven't already.. get a high compression piston kit from AHP. Makes a super huge difference in how those motors run. I pioneered the first piston for Mark in my 3 valver... good stuff. It ran good with the stock 22mm mikuni carb too.