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Dirt Bike Brands - Other
new bike jetting
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[QUOTE="sjmaster, post: 674525, member: 47344"] [b]Still fouling plugs, the saga continues[/b] OK, the motor runs a bit snappier with the next smaller pilot (47 I think)> Ran one whole tank today...motor still ran flawlessly, like it did with the 50 pilot, just a bit snappier. Never really had a crap coming out of the pipe (as others have described), but there is less gunk dripping out of the PV vent line. SO....I took the carb off (love those two phillips in the top cover, they are now stainless allen head ) and I found the float at 3.9mm The book says 5.5 to 7.5 And "THE FLOAT ARM SHOULD BE RESTING ON, BUT NOT DEPRESSING THE NEEDLE VALVE" well, this has me stumped....it has a tiny stainless spring loaded pin on the end that the tab applies pressure to to close it. The float definately pushes that pin down to the end of it's travel...maybe 1.5 mm or so. Is this what they mean by resting on but not depressing? The spring for that tiny pin can not hold the wieght of the floats....for sure...it pushes it down with ease. So do I set the hieght with this pin in the needle depressed? I don't see any other way right now. Please advise. Also, the clip was in #2 (from the top) should I try moving it to the top for the leanest setting? I am guessing the tiny pin and spring is there to ensure shutoff under bouncing conditions.....watercraft Mikunis and Kehiens do not have these little pns in the needles. ALSO what hieght gives a leaner (less fuel in the bowl) setting....I would say the higher (7.5mm) is this right??? Thanks in advance, John [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
new bike jetting
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