Building Harley Big Twin - stupid idea?
Building Harley Big Twin - stupid idea?
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Discussion

Olza23

Original Poster:

109 posts

165 months

Wednesday 16th September 2020
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Hi all

I’ve recently sold my HD Sportster and now own an xDiavel which is a beauty, but part of me still longs for the Harley V-Twin.

I’ve been thinking about this for a long while but how feasible is it for me to simply look for a Dyna/big twin frame (say between 95-2010), engine, wheels etc and start putting it together? I’m not in a rush and will look cost savings where I can.

What I am asking is: should I do it and what could possibly go wrong 😀

Toma500

1,249 posts

283 months

Wednesday 16th September 2020
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Sounds like a good project to me theres bound to be plenty of help online with engine stuff and particularly if it was me wiring and electrics but if your handy with the spanners and soldering iron give it a go ,there must be a few frames in scrap/breakers yards or someone like paughco in the us
Not sure if thats the right spelling ,have plenty of stuff ancillerys oiltanks belt drives etc .

Toma500

1,249 posts

283 months

Wednesday 16th September 2020
quotequote all
https://www.paughco.com/
Careful it could get expensive .

V8RX7

28,982 posts

293 months

Wednesday 16th September 2020
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IME it costs more to buy parts to build a project.

The best way is to find damaged / neglected / unfinished project bikes, take what you want and part the rest out.

crofty1984

17,064 posts

234 months

Wednesday 16th September 2020
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V8RX7 said:
IME it costs more to buy parts to build a project.

The best way is to find damaged / neglected / unfinished project bikes, take what you want and part the rest out.
I was about to say exactly this. Get a neglected one and rebuild it to your tastes. By all means try and get cheap pages where you can during the build process, but it'll be cheaper in the long run. I bet a big twin engine is probably pushing £2000 on its own.

tvrolet

4,761 posts

312 months

Thursday 17th September 2020
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crofty1984 said:
V8RX7 said:
IME it costs more to buy parts to build a project.

The best way is to find damaged / neglected / unfinished project bikes, take what you want and part the rest out.
I was about to say exactly this. Get a neglected one and rebuild it to your tastes. By all means try and get cheap pages where you can during the build process, but it'll be cheaper in the long run. I bet a big twin engine is probably pushing £2000 on its own.
yes it's all the 'little' stuff you have to acquire - wiring, lights, fuse box, battery, chain (or belt), brake lines, fuel lines, fuel pump (if it's injected), gauges, levers, rubbers, plug leads, coils etc etc. Better start with something where all the parts are there albeit some neglected or bent.

There's a very nice Sportster motor in a featherbed frame in a Brit cafe style often pictured in these hallowed pages - very nice bike. And the 'new' Heskeths are Harley-style big twins in sporty frames; I like the idea of them too. Lots of options to build a great bike, but beware of the costs of the 'wee' stuff...

CAPP0

20,881 posts

233 months

Thursday 17th September 2020
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V8RX7 said:
IME it costs more to buy parts to build a project.
yes This is why people break bikes in the first place.

Merch131

996 posts

179 months

Thursday 17th September 2020
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Having built a few big twins from the ground up, yes its pretty easy, if your buying new parts (engine, gearbox, primary are the biggest costs). But it can be very expensive, to build a top notch custom will be at least twice the price of a new standard Harley, perhaps more if our paying someone else to built it for you..

Much cheaper and less hassle (ref Insurance, type approval etc), is to buy a rough standard big twin and rebuilt it as you want. Evo softails would be the easiest and are popular, as they have the biggest aftermarket support, while FLTs until recently were rarely given the full custom treatment.

Sportsters would be cheaper still, and can be built into loads of styles.

If you build it yourself, use second hand parts then it could be done much much cheaper.. eg Do you spend £50 on a rattle can paintjob or £2000 plus from a top end custom paint shop, etc etc..

Oh and the cafe bike mentioned above is one of mine.

I'm thinking of doing the same next year, as I have a new 127ci BT engine / trans / Primary doing nothing at the moment..


gareth_r

6,767 posts

267 months

Thursday 17th September 2020
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I have long thought about building (well, paying someone to build, probably smile) a H-D big twin that looks like a normal motorcycle, or, alternatively, using a shovelhead to create a Coventry Eagle Flying 8 "tribute", but I came to the conclusion that I'd have to start by buying a complete bike, and I don't think there's such a thing as a cheap big Harley in the UK.