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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 04-13-2012, 04:31 PM   #1 (permalink)
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Triumph engine rebuild?

Hello Y'all , I want to buy an old triumph engine to teach myself how to do a rebuild and then use the engine in a hard tail bobber project. Can I get some opinions on weather I should start with a 650 or 750 ? Pre unit or unit ? Most importantly , what is a reasonable price to buy an engine that needs a rebuild? I live close to Rabers in San Jose so parts ,help, and knowledge are close .

Thanks for your time.
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Old 04-13-2012, 05:05 PM   #2 (permalink)
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If it was me, I'd use a 750 from an oil in frame as they seem to be less valued than the earlier bikes.

I don't know if you've ever built a bobber, but the cheapest way of getting a job done (I'm told) is to buy a whole bike that maybe needs work, or has had a prang. That way you'll get the wheel, forks, brakes and engine and sourcing parts is easier if the whole bike started say, as a 76.

The OIF can make a nice bobber - or go earlier if you want a "normal" frame - unless you plan to build one

Generally, the bikes got better - the early OIF had a high frame
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Old 04-13-2012, 05:31 PM   #3 (permalink)
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There is a premium for pre OIF frames. I would not look for that. I would do a unit 750. As Dave said less value. Also there are some great video out there by Four Aces. Specifically a rebuild video that shows you all the steps to tearing down an engine and putting it back together. Also youtube lunmad.
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Old 04-13-2012, 05:51 PM   #4 (permalink)
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The answer seems obvious to me: go down to Raber's and ask what's the best deal on a complete engine that is guaranteed to have all the core parts rebuildable. I'm sure they'll aslso cut you a fair deal on all the overhaul parts, as you will already be dropping a significant chunk of change for the scruffy lump.
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Old 04-14-2012, 07:08 AM   #5 (permalink)
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If it wasn`t a bobber project, I`d go for a late unit 650.
These were tuned more for performance, regardless of the environmental consequences.
Bear in mind the gearshift side changed from R/H to left about 1975.
And the 5-speed box appeared in 1973-ish.

I like 650`s, so I`m a bit biased.
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