norman3516 wrote on 07/09/21 at 13:45:49:do these carbs work ? the one on my bike i just got doesnt run very good , i rebuild it and now it idles right but its hard to start and mid to upper throttle is bad . the mixture screw cant turn in or out , the head on the screw has no slot for the screw driver so i dont know if its set right . the person before me mess it up and i didnt know when i brought the bike . a new s40 carb is 600 . tell me more about your carb please
Yes, the VM carbs work very well on our big singles. Before the factories started using the CV carbs the VM 34/36/38 were extensively used by the factories for big singles. Years ago I had a 1956 BSA Goldstar 500 flat track racing bike with a 38mm VM type carb and it ran like a Screaming Eagle and topped out at 110mph as geared for the 1 mile dirt oval tracks. It was VERY quick.
The VM is the most used performance carb for motorcycles in the world, and has been for over 50 years, and is still being produced today. It is inexpensive and it works.
I’ve been using mine for over 15 years. My bike fires right up without using the choke except on cold winter days. The VM is much more responsive and will add power. It is also easy to tune.