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#901136 01/25/23 3:14 am
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Hello all I have come across a pair of H&C triumph cams I have a catalog from 67 and the number isn’t in that I was wandering if anyone has information on the 6976-9 number thanks for your help

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Seems H&C are set symetrically , http://vintagebikemagazine.com/wp-content/uploads/2017/08/HarmonCollins.pdf

Theres a few mentions in early 60s Cycle World , Desert Racers & Flat trackers .

Heres some other blather , https://www.classicbritishspares.com/blogs/news/best-triumph-camshaft-set-up

the LIFTERS are where youre gunna get got . Apparently the thruxton cam was the old T-Bird Cam , With LARGE RADIUS LIFTERS .

A lod mega racer , had said they / He , put ' FLAT ' followers in a speedway chair T 100 . You had TO WATCH that the Lifter Lower Corner
did not dig into the cam lobe flank .

Id think a few trial assemblies - a case half , barrel & followers . or if youve a past it barrel , take a hacksaw to it , so theyre observable .

THE OLDE .020 clearance , for mucking about with openings and closings . To Late on the ex & to Early on the int & theyll tangle .

No Way would I set the valves back in the head to get the clearance on overlap . but HELE did on the 500 racers for the Daytona Race .

Hopefully someone'll come up with the Exact specs for that number camshaft .

CAN YOU TELL US What the LIFT Is ? .

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looks like theres a TIMING SPEC. SHEET here , but youd need to log in to see it ?
. https://www.jockeyjournal.com/threa...man-collins-roller-lifter-advice.167801/

If theyre big square things they might be the roller type , If theyre ' peaky ' lobes , theyre likely otherwise .

Gotta Picture , or two .

===========================================================================

might be usefull , https://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Number=462961

& contact these guys , re H & C cattledog . http://www.crazyhorsespeedshop.com/history-of-harman---collins.html

Er . . . spec. book . perhaps . it'd pay to ASK FIRST . Those blokes'd know. youd think .

Last edited by Pre Unit; 01/25/23 5:33 am.
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Thanks the spec sheet has it listed the specs are the same as what they earlier called the number 9

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Stay away from crazy horse. Just sayin.


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