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I have a 1971 roadster whose engine number etc fall within the range of the PRs, is there any easy way of telling if it is a PR without stripping the engine?

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John,

I bought this as an import from the USA so the details on the V5C are pretty meaningless in that respect. Date of first reg was 27/4/1971 but the date of first reg in the UK was 20/08/2012. I cant see any info on the V5C about the build date.

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Ask yourself why would someone buy a PR, no doubt for racing, and then at some later point they or another owner removes all the special parts and make it a Roadster leaving only the internal parts PR. They were not all made in one go but in batches with the gaps filled in with std bikes.

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That makes sense, the only thing I know about it is that, according to the NOC records officer, it was exported to the USA 2 days after it was built and wasn’t registered in the UK at that time. 

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A PR would have spent some time once off the line having the special parts fitted, fettling and testing, normally 200 were made so they could be homologated by the racing authorities and no more. So 2 days between build and export says standard bike.

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There is no real way, if the engine is from a racer then you still need the frame which is very slightly different. Without the other parts as well then best it stays a well sorted Roadster. You could make it into a replica, but even some of these parts are hard to find these days and most differ from the original production racers. 

 


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