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2000 Sherco 125 Fuel/oil Mix?


benmaccaskill
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Time after time this topic comes up, surely about time it had its own section.

 

There is no universally right or wrong ratio, but a lot of untruths are posted.

 

Yamaha got it about right when they developed a system that gave 100:1 at no load / idle RPM and 20:1 at high load / high revs. They went even better when they lubed the mains with one type of oil and the piston with another type.

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That's helpful ......

 

I hope it is more helpful than someone advising 80:1 without knowing they type of use the bike is put to and the state of the engine.

 

The statements that rich oil ratios gum exhaust are the most misleading. Use a decent oil with the carburetor set correctly and it just does not happen, even at 20 or 25:1

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