Hi Ryan ; would like to know if i can used Sunoco 260gt plus on Husqvarna FS450 it has an FMF complete system,13.6 piston , Athena 0.1 thinner base gasket for more compression. Any advise is very much appreciated. I live in south America and its the only race gas i can get. Thank youU4 is for 4 strokes period not just singles. Other brands make equal or better fuel such as the Sunoco MO2X. It makes equal to more HP then the MR-9 by VP but at way cheeper prices. MR-9 and MO2X both make more power then the U4.
U4 is not used by any Pro Motocross/supercross teams as it is illegal. U4 is illegal in all AMA pro forms of racing. MR-9 and MO2X are legal in Roadracing. And MO2X is legal in Motocross and Supercross. Supercross and Motocross pro racing has a special blend of VP fuel but the name escapes me right now.
U4 is oxygenated and leaded as is MO2X and MR-9
If you run the U4 you will need to drain your tank and run a little pump gas through it before you let it sit longer then say 2 weeks. U4 will gel up and clog your carb.
MO2X you can leave in your bike and it will not gel.
Also MO2X is 115 octane so it would run great in your XR. Anything with 12:1 compression or higher will run good on high octane/oxygenated fuel.
Hope this helps, If you have any more questions pm me. I am in the race fuel biz for Sunoco if you cant tell and want to help any way I can