Joe I'm not sure anyone has mentioned this explicitly - you have an engine with a roller-bearing big-end and roller bearings in themselves don't give (and don't need) oil pressure. The use of the oil pressure gauge on an Ariel single is a bit artificial as all it really measures is the pressure agai...
I think my chainwheel fits the other way round..... ;) (The chaincase outers are mostly all the same, the inners change between singles and twins but yours looks to be the one for the singles.) My '56 frame (actually left the factory in late '55) doesn't have the centre tank bolt lug (that came in f...
The two-stroke monobloc often has an angled spray tube in the jet block and different needle jets (with no cross-hole?), If you've been trying to get a two-stroke carb to run on a four-stroke engine it might be troublesome....
Dean As Will says, this isn't an straightforward exchange of one head for another. On a pre-1952 cylinder barrel, the barrel spigot won't fit the head (not without being ground to reduce the size anyway). A '52-'55 350 barrel will have the right sized spigot (I think, it's definitely smaller, does t...