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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Golden Spectro 155/45
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[QUOTE="John Harris, post: 934722, member: 30138"] On the stock needle most KDX run best on the next to the top clip. You may want to read some of the many threads on jetting here, but changing the ratio is not the way to jet. Going to 42 to one should be great for your KDX, but understand that this is a richer mixture than say 32 to one! Yes, less oil, but a richer burning mixture. There are exceptions, but engines seldom seize at low speed and a leaner idle jet like 42 suggested will do wonders for your performance. If you are afraid of engine damage go bigger on the main until you are comfortable to reduce it. I agree with Rhodester above: 42 and 155 jets, second clip from the top and your 40 or 42 to one ratio should be great. Every bike is different and read up on jetting here and jet yours for your use. Ride safe John [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Golden Spectro 155/45
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