I asked DVLA how too resigter a project bike from just a frame number and this is the email i got inturn...... (thought id post incase it can help anyone out)
Registering Rebuilt, Radically Altered Vehicles and Kit Cars
Before a vehicle is used or kept on the public road it must to be properly licensed and registered. When a vehicle is first registered, the Driver and Vehicle Licensing Agency (DVLA) allocates a registration mark which has to be properly displayed and this remains with the vehicle until it is broken up, destroyed, permanently exported or transferred to another vehicle in what is known as a "cherished transfer."
Sometimes, however, a vehicle needs to be rebuilt and this can call the identity of the vehicle into question. Is it the original which has simply been repaired or have so many new or different parts been used in the rebuilding process that the original vehicle has been effectively broken up?
In allocating a registration mark to a rebuilt vehicle, the Agency's main interest is to establish whether or not the vehicle is newly constructed with no previously registered identity (in the present form). Vehicles, which have been substantially rebuilt, need to be examined by one of the DVLA Local Offices. NB A Vehicle Identity Check (VIC) will apply to those vehicles notified to the DVLA as being written off on or after 7 April 2003. For information please refer to INF133 available from the Vehicle Operator Services Agency (VOSA). Information is also available from the VOSA Website
www.vosa.gov.uk.
Any vehicle, which has failed VIC, will not be entitled to retain its original registration mark, DVLA Local Office will allocate a 'Q' registration mark and an Enhanced Single Vehicle Approval (ESVA)/ Single Vehicle Approval (SVA)/ Motorcycle Single Vehicle Approval (MSVA) certificate will be required.
If however, a VIC application is rejected by VOSA, DVLA Local Office will need to inspect the vehicle in order to allocate an alternative registration mark. ESVA/SVA/MSVA will be required.
A. Vehicles that have been rebuilt using a mix of new/used parts.
In order to retain the original registration mark:
· Cars and Car-Derived Vans must use:
The original unmodified chassis or unaltered bodyshell (i.e. body and chassis as one unit - monocoque); or
A new chassis or monocoque bodyshell of the same specification as the original supported by evidence from the dealer/manufacturer (e.g. receipt)
And two other major components from the original vehicle - see list below
· Suspension (front & back)
· Axles (both)
· Transmission
· Steering Assembly
· Engine
If a second-hand chassis/monocoque bodyshell is used, the vehicle must pass a ESVA/SVA test after which a "Q" prefix registration number will be allocated.
N.B Vehicle Identification Check
From 7th April 2003, all cars and some tricycles (e.g. Robin Reliant) that are written off by an insurance company or declared scrapped by their owners due to accident damage will have to be notified to DVLA.
VIC has been introduced to deter criminals from disguising stolen cars with the identity of written off or scrapped ones. The check is designed to help confirm that the vehicle being returned to the road has been repaired following accident damage and has not been stolen.
For further information contact the Vehicle Operator Services Agency Website on
www.vosa.gov.uk.
o Motorcycles must use:
· Unmodified Frame (original or new)
And two other major components from the original vehicle
· Forks
· Wheels
· Engine/gearbox
If a second-hand frame is used the vehicle must pass a Motorcycle Single Vehicle Approval (MSVA) test after which a 'Q' prefix registration number will be allocated.
B. Radically Altered Vehicles
This covers vehicles which are substantially altered from their original specification, but which are not kit conversions.
In these cases the vehicle components used from the original vehicle will be given a numerical value and, in order to retain the original registration mark the vehicle must score eight or more points.
If less than eight points are scored or a second-hand or modified chassis or altered monocoque bodyshell is used an ESVA/SVA/MSVA certificate will be required to register the vehicle and a 'Q' prefix registration number will be allocated.
The following values will be allocated to the major components used:
Points
Chassis/body shell (body and chassis as one unit - monocoque)* (original or new) = 5
Suspension = 2
Axles = 2
Transmission = 2
Steering Assembly = 2
Engine = 1
*Direct replacement from the manufactures
NB. Where there is evidence that two vehicles have been welded together to form one (i.e. 'Cut and Shut') a 'Q' mark will be allocated. ESVA/SVA/MSVA will be required.
Vehicle Identification Number
This is a legal requirement for all vehicles used on the public highway to carry a Vehicle Identity Number (VIN). This may be lost when a vehicle is substantially rebuilt, particularly in the case of kit vehicles where the chassis/bodyshell may not have been stamped by the manufacturer. In such circumstances the DVLA Local Office will allocate a replacement VIN.
The DVLA Local Office will issue an authorisation letter and registration will not take effect until the Agency receives confirmation that the vehicle has been stamped with the correct identity.
Registration of Vehicles without Identity
The following procedures must be followed when making application for the registration and first licensing of a vehicle without identity
· You should use your nearest DVLA Local Office.
Applications from outside a DVLA Local Office's catchment area will be refused;
· You will be asked to produce your driving licence as proof of identity and address;
· You will be asked to produce official receipts from identifiable suppliers for the components used in a rebuild. The authenticity of receipts may be checked. They will be stamped by the DVLA Local Office before return;
· All vehicles without identity (VIN and registration mark) will be inspected by DVLA and referred to the police.
These arrangements have been introduced in an effort to combat vehicle crime. Applicants who rebuild vehicles and can prove the origins of the components need not be concerned. However, if the police believe a vehicle to be stolen DVLA will refuse to register and it may be impounded.
Prospective purchasers of vehicles without identity are advised to exercise caution. If a vehicle is suspected of being stolen both it and the money paid for it may be lost. Advice for prospective purchasers of vehicles (The car buyers Guide) is available from Crime Prevention Officers and DVLA Local Offices.
C. Kit Cars
Where all the parts of a vehicle are supplied new by the manufacturer. Subject to the provision of satisfactory receipts and a Certificate of Newness these vehicles will be registered under a current registration mark.
Kit cars which been built using not more than one reconditioned component will also be registered under a current mark. This is subject to the provision of satisfactory evidence that the component has been reconditioned to an "as new" standard. An ESVA/SVA/MSVA test will be required. For details of the SVA scheme, please see Import Section.
D. Kit Conversions
This is where a kit of new parts is added to an existing vehicle or old parts are added to a kit comprising a manufactured body/chassis/monocoque bodyshell. The general appearance of the vehicle will change and result in a revised description on the registration document/Certificate.
A vehicle will retain its donor registration mark if either the original unmodified chassis or unaltered monocoque bodyshell and two other major components are used.
If a new monocoque bodyshell or chassis from a specialist kit manufacturer is used (or an altered chassis/bodyshell from an existing vehicle) together with two major components from a donor vehicle, an age related mark will be assigned. The mark will be based on the age of the donor vehicle. An ESVA/SVA/MSVA test will be required to register the vehicle.
Where there are insufficient parts from a donor vehicle or in cases where the original registration mark is unknown, an ESVA/SVA/MSVA certificate will be required to register the vehicle and a 'Q' prefix registration number will be allocated.
I hope this helps as there was limited information given in your e-mail.
Regards
Debra Thornton
i could be wrong 
but i dont think so 
. With no reg number a frame is worthles they wont give you a V5 . I hered if you aply for a V5 becourse you lost one or wasnt given one with a framev or bike they wont send it to you anyway they will send it to the last registard keeper and it costs £20 to get a lost V5 theys days aswell. 