Questions & Answers for: Yamaha YZ 125 what fuel octane

...octane boost into the gas. Is it possible to mix in too much? Don't know what else to do? if you were to wire it into the orange it will kill the motor. do you get spark with kill switch on? if so ...

octane fuel, 32 to 1 mix, thinking 390 main and 91 octane mixed 32 to 1??? Higher octane fuel is needed from what you describe. Without knowing where you are located and how hard you ride the bike, it

...its running Do you mean it continues to run after you have switched to off? It may be from too low of an octane fuel. If it runs then sputters and then finally dies, you may need higher octane

...fuel isnt what it used to be...I would run 93 octane...I dont know if you have to mix it or not but 93 is best for all...It is a lot cleaner,stronger...but dont change fuels around a lot this will ...