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Norton conrods on triumph pre unit crankshaft #765587
02/16/19 9:58 pm
02/16/19 9:58 pm
Joined: Dec 2015
Posts: 35
scotland
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harvey_mushman Offline OP
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harvey_mushman  Offline OP
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Joined: Dec 2015
Posts: 35
scotland
Has anybody out there any experience with a triumph pre unit crank being modified to take norton con rods at 1.750" i have a crankshaft that has been adjusted thus and also polished, any ideas?

regards

derek

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Re: Norton conrods on triumph pre unit crankshaft [Re: NickL] #765823
02/19/19 7:38 am
02/19/19 7:38 am
Joined: Dec 2015
Posts: 35
scotland
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harvey_mushman Offline OP
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harvey_mushman  Offline OP
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Joined: Dec 2015
Posts: 35
scotland
Hi Nick, Thanks for reply, the crank came with some old grasstrack racing stuff, 8 valve head, 90mm barrels for puma crankcases and other stuff. Ill try and put a picture up. cheers derek
[Linked Image][Linked Image]

Last edited by harvey_mushman; 02/19/19 7:50 am.
Re: Norton conrods on triumph pre unit crankshaft [Re: NickL] #765948
02/20/19 3:46 pm
02/20/19 3:46 pm
Joined: Dec 2015
Posts: 35
scotland
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harvey_mushman Offline OP
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harvey_mushman  Offline OP
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Joined: Dec 2015
Posts: 35
scotland
90mm cosworth forged pistons and bronze sculling in the heads[Linked Image]

It would have been a bit of a monster but i ended up swapping the bits i had for a norton belt drive kit for my tribsa. I was never going to be able to make it work. I think thats what the crank may have been used for, the cases that suit the barrels in picture i never had but they were possibly available at some point back in time!

regards

derek


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