The older generation know what these are

[Woodzie]

Ahhh the 7a
2 1/8 inch bore
2 1/8 stroke
123cc
1500 rpm
and runs for 5 1/2 hours per gallon. weighs in at 45 Kg

He also has a stewart turner 10v , a derby 4f and tich .........plus alot more



Spotted this one last year