Came across the following on
http://www.joeydunlop.co.uk/joey_dunlop_biography_4.htm
‘Merv Robinson’s own career had begun, according to Brendan, with ‘just one or two meetings in 1967 on a 197cc Villiers borrowed from Frank Kennedy. In 1968 he built a 175 Bantam. He was a good engineer and it was a really special machine, with a one-off frame made from Reynolds 531 tubing, disc-valve induction and driving through a Tiger Cub gearbox. But he only raced it about twice that year, and once in 1969.
Mervyn Robinson was one of Ireland’s top racers. Sadly he died during the 1980 North West races.
Is it possible to combine a Bantam engine with Cub box? And if so, why bother?