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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Shimmy
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[QUOTE="Ol'89r, post: 1201944, member: 17212"] The unicam uses one cam in a cassette type of holder. The single cam rides over the intake valves and uses a shim and bucket design to open and close the intake valves. From the single cam there is a rocker arm that opens and closes the exhaust valves. Pretty trick set-up and makes it very easy to check and adjust the valves. DOHC. Double Over Head Cam. Uses two cams. One cam for the intake valves and one for the exhaust valves. Modern thumpers use the shim and bucket design and older bikes like the XR line, use adjustable rocker arms. To my knowledge, Honda has never made an over head valve engine using pushrods. This is a design used by older British and American made engines. Honda had the overhead cam design way back in the 60's and possibly before. Just my $ .02 [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Shimmy
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