Question about 2007 AJP PR4 125 Enduro

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Grade of fuel

What grade (octane rating) of fuel should I use and why?

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Use the minimum octane that does not cause your engine to knock. Anything more is wasted money.

Posted on Nov 10, 2008

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There is alot of discussion on this matter, ill give you mine, lol.

The recomended fuel to use is the high octane pump gas.

The proper fuel to use is actually the octane just above what will make your engine knock. Now no pump gas out there will make a harley engine knock exept like 83 or something, I would use the 91 or 93 is ok. but the 95 or higher in some areas will not give you any extra, just soak up your pocket book. and actually a really high octane is bad for your stock engine, so no octane boosters either.

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Do I need to use 91 octane gas in my bike?

What does the manufacture say to use? if they say to use it there must be a reason. It won;t hurt to try a lower octane but listen carefully for engine knock, if you hear it get back to the highere octane fuel. stokes make it real hard to hear the knock but the performance will be deminished. I personally use the higher octane when ever I can get it but I use mid grade and if only regular is available I use it with no problem.

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1 Answer

Grade of fuel

Use the minimum octane that does not cause your engine to knock. Anything more is wasted money.

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