First time i saw a pic just recently i said wow, i never know triumph made a 2 stroke before. I was then educated to the fact it's a 4, not a 2 stroke. The question is, there is no room In the head for valves, so how does this work?
triumph trw...splain me this lucy..
- Thread starter dazco
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I found a PDF file with a pic in it. Thats bizzare. I never knew something like that existed. I guess they aren't particularly reliable or not good performers or there would be more of them.
Is this the one your are talking about, it does look strange
Thats one of them but there are a bunch i've seen, not just triumph. Some look so much like a 2 stroke with the finned head i couldn't imagine how they could have valves. But the valves aren't there, they are in a area off the head/cylinders where the carbs are in a sort of manifold leading to the cylinders. But thats the intake....I have no idea where the exhaust valves are tho !
I must do a bit of research on this as I now would love to know how they work
There are two TRW's (ex-military) in our vintage bike club that have been civilianized and are ridden regularly. One of our members has a collection of 17 military versions from 1956 or 1957.
They were developed in WWII for dispatcher riders and convoy escort duty. The Army specified side valves for reliability and ease of maintenance. All the British manufacturers produced similar models for military service during the war.
They were developed in WWII for dispatcher riders and convoy escort duty. The Army specified side valves for reliability and ease of maintenance. All the British manufacturers produced similar models for military service during the war.
Thanks Rocky now that is very interesting did not know this
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