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Yamaha MX & Off-Road Dirt Bikes
EG YZ144 Jetting
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[QUOTE="burgunder, post: 1194529, member: 72783"] Well, i went to a 37.5pj and went to the second clip on the 07 needle. I kept the 450 main from advice form PTcr. It does run cleaner with absolutly no sign of fowling or a single stumble. I do want it to be a little rich because I run a lot of different terrain from tight trails to open sand. I would rather be a little rich in the wood than burn up a piston in the sand or mud. BUT, I am still getting a ton of GOOOO on the swing arm and out the end of the pipe. Questions - Will lowering the main to a 440 effect the needle circuit or the pilot circuit at all? Is the 07 needle richer than the 05 needle? Next, I think I am going to try the 35pj and which back to the 05 needle depending on the answer to my 2nd question. Any imput would be great. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
EG YZ144 Jetting
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