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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Pw-50
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[QUOTE="FruDaddy, post: 1039391, member: 63076"] Box 1 is the reed block. The actual stock reed is a thin sheet of metal. Parts 4&5 are a pair of screws and washers that hold the reed in place. Part 6 is more of a brace and is about 1"x1/4". Part 2 is the reed, and 3 is the reed stop that keeps the reed from bending too much. If you are careful, you can re-use the gaskets (7&8). When switching to the Boyeson, you replace 2 with two separate pieces, make sure the one with the holes is nearer the carb when installed. I think 3 is also replaced, but I can't remember. Once you have the Boyeson in hand, and get into the intake, you should see what I'm talking about, then all will be clear. Once installed, adjust the air screw in 1/4 turn increments until it starts then fine tune it. Then move on the the needle. I think you can get away with the stock main jet, which is too rich when stock. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Pw-50
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