Your right it was 82
This is the bike that won it was called a Fournals made by the French suspension company and yes it did have a single sided swing arm.
The bloke rode in shorts and a vest all 4 days, you have never seen a tyre so bald and he won by miles who ever he was......
1981 French 4 Day..... Paul Casling, Dave Renham, John Chapel, Mick Brown ? and the 2 Hawney brothers Ian Weatherhill was in the Gori Van........
Hows the Sunny USA Mr Motosinge ???
Brian Griffiths M/cycles is the best place Tel: 01981 550434 he's not allways there just keep trying.
And yes Birket did ride a JCM when Reg May was doing some tuning for Bob Gollner.