ORIGINAL: the mother of invention

You don't have to convert anything on the big Tigers. Run E85 from the gas station at 1.99 a gallon and put in 12-18% oil depending on the model you have. The S2000,2500 and 3000 run on 18% oil (15% synthetic 3% castor) and the S2300, 4500 run on 12% oil (10% synthetic 2% castor). Just change your glow plug to an OS F and it will run like a top even inverted without on board glow driver. It is the best fuel for you Super Tigers. I have been running this and checking head and exhaust temp with laser thermometer and with that mix the temps are identical to glow fuel.