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General => Technical | How To => Topic started by: Brrapp on April 04, 2025, 07:43:50 AM

Title: Camshafts
Post by: Brrapp on April 04, 2025, 07:43:50 AM

Does anyone have any real specs of the camshafts available for the GY6? A9, A10, A11, etc.

The only useful thing I can find is lift, and thats useless without timing.

I did find 'angle in valve alpha' and 'angle between valves beta' if someone knows what they mean.

Title: Re: Camshafts
Post by: JJJoseph on April 18, 2025, 06:16:37 AM

Quote from: Brrapp on April 04, 2025, 07:43:50 AM

and thats useless without timing.

FWIW, GY6 timing is fixed,  so the topic might be moot :-)

Title: Re: Camshafts
Post by: Brrapp on April 20, 2025, 01:22:21 PM

Cam timing, i.e. the timing (degrees) when the valves open and close.

Title: Re: Camshafts
Post by: JJJoseph on April 21, 2025, 07:35:31 AM

Timing is fixed.  You'd have to regrind the camshaft to change the timing.  Realistically, you'd have to buy a replacement cam, but they all have standard fixed timing, so it's an unlikely remedy.  Some GY-6 engines can use an ECM module with variable spark timing, but they don't work on all GY-6's.  You'd have to experiment.