Good overview of engine cylinder stuff - Triumph675.Net Forums
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post #1 of 6 Old 09-17-18, 15:46 Thread Starter
Phicurious86
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Good overview of engine cylinder stuff

Another
by Engineering Explained!

Does anyone besides Honda use this system in motorcycles?
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post #2 of 6 Old 09-18-18, 00:35
MacBandit
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The first road bike I know that used variable vale timing was the 1991 Suzuki Bandit 400VVT. Its udentifiable by its red valve cover. BMW just released a new boxer motor that actually slides the cam to a separate set of lobes. Im sure there are others as well. Those are just the ones I know of not counting the VFR.
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post #3 of 6 Old 09-18-18, 06:59
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BMW also has VANOS, which is variable cam timing for the purpose of linear power delivery across the powerband. Made famous by the E46 M3's S54 inline 6 cylinder. Common issues with the design include the faulting of the exhaust camshaft hub and VANOS Oil Pump engagement, solenoid bank, and a few others. Exhaust hub failure can very often be catastrophic and require replacement of the entire VANOS unit, though it is common these issues can be avoided with an updated oil pump disk and exhaust cam hub. That said, there is nothing on earth like banging that 340 hp 3.2L on the door of 9k RPM and the whole time it's pulling like a mother****ing dump truck.
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post #4 of 6 Old 09-18-18, 10:16
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post #5 of 6 Old 09-18-18, 13:27
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VANOS is VCT like Vtech, but both are VVT.

My mistake though OP, you were asking about bikes.
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post #6 of 6 Old 06-24-20, 05:30
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Exhaust hub failure can very often be catastrophic.
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