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Fouling plugs before I can even warm it up...

This is a discussion on Fouling plugs before I can even warm it up... within the 2-Stroke Motorcycles - Yamaha forum, part of the 2-Stroke Motorcycle Forums category; Alright I've been fouling plugs left and right with this YZ. As far as I know, the jetting is stock ...

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Old 08-11-2009, 12:42 PM
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Default Fouling plugs before I can even warm it up...

Alright I've been fouling plugs left and right with this YZ. As far as I know, the jetting is stock and my air screw is 1.75 turns out. I go through a plug almost every time that I stop. This morning I went out to warm it up before I rode, and I kicked a few times and it fired up. Idled, but wouldn't rev up too high then fouled the plug. It did this 3 times before I said to hell with it. I know I'll have to go down on my pilot, but how much? I haven't had time to go through the carb yet but it's getting ridiculous. Heres my plug after being in for less than 5 minutes with maybe 10 seconds run time. It's a bad pic, but it shows the condition nonetheless. What's up with this? And does anyone know the stock float level?

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Old 08-11-2009, 01:39 PM
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What bike is it? I know I have replied to other posts you have made, but I don't recall the bike.

What plug are you running?

If it's fouling plugs this quickly, I would not hesitate to drop 2 sizes on your pilot. This assumes your float is set, your air filter is clean - you know the drill.

Scott
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Old 08-11-2009, 01:42 PM
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It's a 98 YZ250, running a BR8EG/BR8ES plug. I have a BR9EG as well that I keep having to switch between. It sucks because I can hardly get it to idle.
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Old 08-11-2009, 02:37 PM
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Drop your pilot 2 sizes and go from there. Maybe even three if it's as bad as you describe.

Scott
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Old 08-11-2009, 03:00 PM
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I'm going to order 2 sizes down in both the pilot and the main on Thursday, any where to get cheap jets?
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Old 08-11-2009, 03:35 PM
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I buy from [Only registered and activated users can see links. ] or [Only registered and activated users can see links. ].

Scott
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Old 08-12-2009, 12:03 PM
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Wow those places are charging a good $6 for a pilot jet. To RM I go! haha
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Old 08-12-2009, 01:24 PM
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[Only registered and activated users can see links. ] is another good place to get cheap jets.
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