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Right , i have a itch to scratch and have done for , i don't know , longer than 10 years to make my own motorbike . Welding is no problem , nor is machining , but here is where i crop up - i have no bike license , hence have not actually taken a bike apart so need some direction or pointers as to how to go about things , perhaps a link to a useful website ?
One question i cannot get my head around is how do people fit different forks to a different frame ? I expect there is a difference in diameters of various bits so how does that work ? Different bearings or spacers etc .
Any pointers or practical notes gladly welcome .
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Kieran
Posted a lot
Posts: 1,092
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Either modify the existing yolks to take the new forks or press out the stem and fit to the new bottom yolk.
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The Ashby Jackson fleet:-
1979 Mini Clubman 1.8 K series
1978 Skoda 110r Project 130RS K-oupe
1978 Austin Allegro 1500 SDL Estate
1984 BMW K100 Sidecar outfit
1999 Yamaha FZS 1000 Fazer
1991 Kawasaki ZXR400 race bike
2002 Kawasaki ZX9r race bike
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Last Edit: Mar 6, 2017 20:14:01 GMT by nomad: Typos
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Yes don't worry . Welded all sorts of stuff from F1 to nuclear to oil/gas to cyrogenic . Ok machining , 20 years hand on engineering experience , good eye for things . I understand stress and strain , loads , materials , geometry etc .
I should be ok if it ever happens .
Thanks for the links , I'm sure they will be most helpful .
And i understand your concern , i looked into doing this years ago and found a forum with people with no idea encouraging some numpty that had just bought a tig set to modify his own frames etc , telling him his welding was ace etc [ it was wibblepoo ] .
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What is it you actually want to achieve look wise? Wander down to the newsagents and buy Back Street Heros or something similar for ideas.
If you are going for a complete fresh frame build I would start with an existing road registered engine and frame then modify it from the headstock back to avoid issues with registration.
Hard tails (no rear suspension) look cool but my experience was my back regretting the decision.
Spacers/ adaptors/ different bearings fantastic machine work and even home casting can all be used to make parts from different bikes and manufacturers fit.
I'm sure you can find a guide on line that will explain the effects of changing the frame geometry on the handling characteristics.
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Not too sure on what style of bike . I like bobbers but hate the empty frame look when they have a triumph engine or the awkward rear seat/tyre area, and i will not have the funds to stretch to a harley engine .
Perhaps xs650 , triumph engine bought in bits over time . Erring towards maybe a triton type look or like a early triumph thunderbird or something . To be honest i think the best thing is to buy a engine and decide on some wheels and start there , or save for a xs650 and go from there .
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What about starting with something like an SRX660?  I'm struggling to think of an affordable aircooled V twin engine other than a Harley which aren't affordable |
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Yamaha XV series air cooled V twins at sensible prices
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Cheers . Doesnt have to be a v twin although they do fill up the space nicely .
Do you know the differences between UK and US XS650's ? Do they have different engines ? Are the frames slightly different as they look like slighty ghey choppers with high handlebars .
Do you think you would have trouble if yo made one from a unregistered US frame as there is one on ebay ?
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Probably only manage to get a Q plate and have various hurdles to jump through as it's not going to be a standard bike when inspected.
American versions tend to be similar but with a more custom look, generally just cosmetics
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Advise you buy a complete (UK registered) bike as a base, even if you end up changing most of it. Something with cosmetic damage or a blown engine could be a bargain  Don't underestimate the cost of buying bits individually, or the problems trying to fit unmatched parts together. A registered but unfinished project might give you a good start (but beware - lots of folk work out how much they have spend then try to get their money back - it's sometimes cheaper to buy a running bike on the road, or they might be selling because they've just noticed the big flaw in their plans  ) retrorides.proboards.com/thread/97759/retro-motorbike-people  |
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Yes , i know how much individual parts cost from scanning for Triumph parts a few years back , due to what i call greedy old shed man syndrome . Old man buys bikes cheap years ago , he buys many bikes . As he gets older he breaks down the bikes into individual component , nut and bolt and wants a fortune for them . Other greedy old gits see this happening and all do the same .
Hence why you very rarely see parts together , especially engines and boxes .
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Cheers for the link to the other forum , it appears its pretty much dead though .
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hi dave, can i suggest that you start a bit smaller, if you don't have a licence then do your cbt, £100, half a day, and supprisingly fun. then get yourself a 125cc machine and do that up/alter to taste etc. i know its not a big bike but loads can be learned from it and if you make a good job of it you can either ride and enjoy for a bit and gain valuable riding experience, or sell on for good money, 125`s are ALLWAYS in demand and will always fetch good money for a good moded one. this is exactly what i`m doing at the moment, and enjoying it very much. i realise its not the dream machine that we would all like but it is a fairly easy and wallet friendly way into bike building.
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Toyota mk3 supra. retro goodness.
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Mar 10, 2017 15:14:19 GMT
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I quite often see around here one of those cheapo Chinese Honda copies that someone has made into a café racer style bike. It only looks like a 125ish size bike but it works surprisingly well.
I'll try to get a pic next time I see it.
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67 VW Split bus
69 Beetle Cab
96 Jeep Cherokee XJ Sport
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Mar 10, 2017 22:19:59 GMT
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I quite often see around here one of those cheapo Chinese Honda copies that someone has made into a café racer style bike. It only looks like a 125ish size bike but it works surprisingly well. I'll try to get a pic next time I see it. It's probably one of those Skyteam Ace bikes that come as a 50cc or 125cc .  And this is a project for the summer, a Jawa Mustang 50cc.   |
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1955 Austin A30
1981 Jawa Mustang
1990 Trabant 601 (Tommy)
1989 Trabant 601
2009 Jaguar XF
2012 Toyota AYGO
2018 Scomadi TL
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)
