I run a number of big supre tigres, from the 2000 up to the big 6000 twin, I run all on home brew, 15% oil no nitro. I get mymethanol in bulk for aboput the cost of gas, so just the cost of oil to be added. I have found that even 10% nitro gives no real benefit power/performance wise, just blows more glo plugs. I run 4 stroke plugs with idle bar and all my st's have original carbys. These motors seem to take forever to run in, but do that right they seem to run forever and a day. one advantage with them is you have no ignition system to worry about, no extra battery switching etc, and set up right they will reliably start every time with a quick back flip. I love them, good solid reliable motors with plenty of power, and I have found that they work best propped up, i run 20 x 8 or20 x 10 on my 3000"s.

edited a booboo