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does anybody now what the diffrence between a uni cam and a twin cam? does it increase performance or do any thing

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Unicam engines use 1 camshaft to operate both the intake and exhaust. Twin cam engines use a separate camshaft for exhaust and intake. With a single camshaft, it is usually necessary to use some kind of rocket arm assembly to operate the valves because of space limitations. When using separate camshafts, it's possible to position the cams directly over the valves so no rocker assembly is required. I don't know all of the specific engineering principals to explain in detail which is best. I believe it depends on a number of things such as the application of the engine, how many cylinders, and how many valves. It seems there are more high performance motorcycles with twin cam designed motors as opposed to unicam and there must be a reason for it. It may be as simple as the added movement required by the rocker assembly detracts from performance.

Does someone know which is better and why? :thumbsup:

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