Ariel 1931 MF 350cc 1 cyl ohv



Ariel 1931  MF    350 cc     OHV       frame# J 489  engine# A 147

This machine has the cylinder inclined forward at 45 degrees to the vertical. 
The sloping engine was a popular design feature around 1930, with the famous BSA “ sloper” as leading model. 
The craze lasted about half a dozen years: by the mid thirties there were hardly any sloping models left; Panthers being a notable exception of course. 
The 250 cc OHV Colt model of 1930 had been a good seller, but there  was some demand for a similar machine with slightly better overall performance. 
So  in March 1931 the factory introduced a 346 cc OHV version of the Colt, with 72 mm bore and 85 mm stroke. 
The model has a two port head and was priced at a modest £ 42. Magdyno lighting was an optional extra. 
Gearbox is 3 speed Burman, dry sump  lubrication by twin plunger pump. 
Primary chain is enclosed in a cast-aluminium oil bath. 
This machine is an older restoration and runs well.