Maybe they made both engines alongside each other? I don't know about that but what I do know is that the original one we had was a 1939 model and I had the engine in enough pieces to know that it was a side valve one. We also picked up a 1951 bike with a side valve engine that was stripped for spares because the frame was bent.picos mestizo wrote:1931 the Bullet 350 & 500 became OHVAndyB wrote:They're out there if you look hard enough. There was one in my family for 30 years and it was finally sold about 10 years ago.picos mestizo wrote:Not many gutless side valvers around they've been ohv for about 80 years :whistle:AndyB wrote:If I was going to buy an Enfield and wanted to keep it simple I'd be looking at one of the original British built ones that really can be rebuilt at the side of the road and need a set of feeler gauges along with a light bulb on two pieces of cable to set the timing.
The old side valve engines are simple to work on and they're hardly stressed at all so once you've set it up they just keep plodding along all day plus you can still get plenty of spares for them.
I think they changed to ohv in the mid '50s but the bottom end stayed the same.
There were a lot of WD/C bikes made during WWII and having just had a look at the notes made from the rebuilds on the ones we had they say that the army complained about the side valve lacking power and got an ohv version just before the end of the war. Apparently a lot of bikes made for the army weren't issued to them and were sold off after the war which was where the 1951 bike came from but maybe that was a rogue one?
I'm not that bothered really. I was obviously wrong and should have checked when they actually stopped making the engines, not when they stopped being available.

