750cc 1975 Norton Cam Help

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750cc 1975 Norton Cam Help

Postby DaveK » Mon Dec 28, 2009 7:48 pm

I have a 750 Mk3 and I need a cam shaft for it. I have a norris D cam shaft kicking around but im not sure if it will work for my 750. These are the figures from my norris spec sheet. the following figures were taken at .020"

Duration: intake 316" Exhaust 316"
Lifts: Intake 438 exhaust 438.
Valve clearence when cold: intake, .008" exhaust .010".


The Cam has a S.M. Number? #72089
Dave K -- 77' MkIII
85' Virago
85' Nighthawk
British Columbia, Canada
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Re: 750cc 1975 Norton Cam Help

Postby RennieK » Tue Dec 29, 2009 3:45 am

Holy shite! Is this the short stroke?
Rip Van Winkle
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Re: 750cc 1975 Norton Cam Help

Postby lcrken » Tue Dec 29, 2009 1:36 pm

Norris catalog says D grind is "All-Out Drag, Fuel or Gas, Land Speed Record" cam. Not exactly what you would want for a street bike.

750 MK3? AFAIK all MK3 were 850. Very, very few, if any production bikes, were sold to the public with the short stroke 750, and it was not listed as an option for the MK3.

Ken
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Re: 750cc 1975 Norton Cam Help

Postby DaveK » Wed Dec 30, 2009 12:07 am

Sorry I have a 1977 850 mk3 but the head and pistons are changed to 750. I just say 1975 so there is less confusion with sometimes adds confusion........ya :roll:
Dave K -- 77' MkIII
85' Virago
85' Nighthawk
British Columbia, Canada
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