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Yamaha MX & Off-Road Dirt Bikes
YZ250F fouls plugs!
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[QUOTE="Grashopr, post: 282055, member: 28542"] [b]Fouled Plugs[/b] Don't it suck? I have had my YZ426 for three weeks now. I bought it used from a guy in Michigan. He sent it home with me with a full tank of gas. I filled up my 5 gal gas holder with premium Conoco gasoline (thats 91 octane here in KS). After I put gas in it twice, it would foul plugs when it died. If I pulled the plug, and cleaned it, it would fire first try..but if it died.it was DONE! Pull out the sockets 'cause the plugs fouled...GUARANTEED. After pulling the plug and cleaning it three times, I went to my local Yamaha shop and asked them what was up. They asked if I was running premium gas..I said 'yeah'...I figured it would be good for the bike. The head mechanic said first thing...go to 87 octane regular fuel. He said that around here they put alcohol in the fuel or ethanol in it to bump up the octane rating. The YZF's can't handle the alcohol or ethanol (or whatever's in our premium gas) and it causes the plugs to foul. I drained the tank, put in 87 octane Amoco gas, and it hasn't happened since! Might wanna give that a try. Grasshopper [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ250F fouls plugs!
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