I had exactly the same problem with my M620 DD bike - it was a Cat B and a monkey with a chisel had obliterated the frame number.
When I spoke to the ACU and New Era they quoted the rulebook and stated that the frame number had to be visible and untampered with (although they didn't say original!) - so I didn't want to sell it for racing use.
If have an idea of the reg number you might be able to persuade your friendly local dealer to run an HPI check you can get a printout which shows the write-off history etc as well as the frame number. or alternatively DUK may be able to give you the VIN from the engine number.
Then repaint the frame and stick a sticker with the frame number on the headstock. I know of a couple of people who have raced like this with no problem.
I decided I couldn't be ar8ed with all that so I have got another frame sorted out.
Good luck
paynep
Hybrid Mode
