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Yamaha MX & Off-Road Dirt Bikes
98 YZ400 pair of strange problems
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[QUOTE="darrenposton, post: 1365927, member: 59194"] I had already eliminated valve clearance issues cuz I checked it prior to this last ride and it was spot on. All the external vacuum lines, hoses, connections etc. are all in good shape and tight. I too first thought air leak so double checked to make sure the hot start hadn't started leaking as well but it wasn't. Both problems do indicate in my opinion a lean condition however. I was talking to my buddy this morning and he said something similiar happened to his quad a while back and he found that a piece of trash had been sucked up into the main jet causing a lean condition. I didn't pull the bowl plug or main jet last night, but after thinking about what he said, it seems to match up and could very well be the problem - will be checking that this evening D [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
98 YZ400 pair of strange problems
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