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Yamaha MX & Off-Road Dirt Bikes
Fuel mixture on 79 Yamaha IT250
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[QUOTE="whenfoxforks-ruled, post: 1342460, member: 73147"] If the manual says 20:1, then its BEST to run it 20:1. The carb is also jetted for 20:1. In bizarro world people figure and take advise from the wrong people. They come up with all kinds of stories about 32:1 all the way to 100:1. When these engineers drop the amount of oil, that means it will get more gas! Now if they know how to jet, no problem, make your own baseline and altitude and temperature corrections, piece of cake? Run the correct mix, look in the manual, start with stock jetting for your temperature and altitude, already in the manual. And it can help you jet, specifically for your bike! Here is what bizarro world will say to the easy method: I ran it 20:1 with premium fuel, stock jetting, and it keeps fouling plugs. You have to have an engine in good working order, jet it and it should be fine. As long as some guy from bizarro world has not ported and polished the engine, it will never be able to jet it correctly, or run correctly. Sorry for the rant, but this kind of mis-information question comes up way too often! [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Fuel mixture on 79 Yamaha IT250
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