Altering a frame

[BarryH]

If I altered a frame, but it kept the same VIN Number could I keep the same plate/log book or would I have to put the finished bike through an inspection?

The rear end will be cut away and new tube fabricated. I would say that 75% of the original frame will be as it came from the factory. The swing arm pivot would go and so would the top shock mounts and a load of mounting bracketry which will be surplus to requirements.

In its place there would be a new mono shock mounting and seat/subframe assembly.

I've had a look around the usual VOSA sites and spoken to the vehicle licensing people, they haven't got a clue!

[bikerpiker]

I havn't a clue either , but wouldnt think there would be a problem keepng same plate/logbook, if it is the original frame,albeit heavilly modded ,unless you were altering the clasification of the vehicle , ie ,making a bike into a trike

Just my thoughts ,but honestly dont know for sure

[Jim67]

I would look on it along the line of if your bike was in a smash and the frame needed repair i.e frame welding etc then it would need to be inspected as roadworthy? forget which cat right off it would be but have a chat to a bike mot'er see what they say? at the end of the day its got to be safe.

Jim.

[bikerpiker]

Jim , a bike in an accident is different circumstances altogether , you may be correct though
A few guys on here have done/are doing modifications, ie fitting completely non standard rear subframes ,and i doubt their bikes would need a special examination ,havin said that, i suppose their actual main frame are not modified in any way
A tricky one......but i still reckon no inspection

[marravtr]

cant see any problem at all myself, my mates hard core streetfighter his bike looks nothing like when it came out the factory, infact no one ever guesses right wot it is, no probs with mot, insurance or plod

[sirch345]

A very good question for sure Barry
One which I don't know the answer either.

I was always under the impression that a vehicle built as a one-off special needed an engineers report to say that the work carried out was up to scratch before you could get it insured. But from what I see/hear now-a-days I'm not sure that is happening.

Chris.

[marravtr]

I was always under the impression that a vehicle built as a one-off special needed an engineers report to say that the work carried out was up to scratch before you could get it insured.

good point but...............



that only counts for a new bike being built up from scratch, with a frame made up, if your only "customizing" a frame thats already reg then not a prob, plenty of insurance firms out there for specials with agreed value

[BarryH]

Cheers chaps, I'll spark the grinder up at the weekend....

[BarryH]

You building a chop?

........wash your mouth out. NO is the answer to that. I've a Harris frame for a CB750, well that was what it was advertised as and thats what it says on the V5. I'm putting a CBX750 twincam 16valve jobby into it.

The swingarm won't allow anything bigger than a 150 in so I'm getting rid of the swing arm, which looks to be standard CB750 fodder and going for a mono rear end. Looking to go the USD route upfront.

Hopefully it'll be a retro type café racer with a modern twist. When I get there!

[sirch345]

Hopefully it'll be a retro type café racer with a modern twist. When I get there!

Ummm that sounds very tasty Barry

I remember the Honda CBX750 16 valver very well as I almost bought one Iirc it was the poor fuel comsumption that put me off as that would have been my main form of transport back then.

Hope it all goes to plan, look forward to seeing some pic's later on

Cheers,

Chris.