Jug, if you still have the Mikuni it would probably be worth looking at the float valve size and the float level. With the right settings the VM and TM carbs will comfortably support 50 HP from 500 cc single two and four strokes.I have run the vm 34 round slide and the low to mid performance was great. The top end was a let down. I found the carb ran out of fuel up top, perhaps if a larger bowl were available it would make a difference. Bike would starve and start to break down when pushed hard.
Don't know how a flat side would be any different if it's the same size.
Jug
That's one is gone mate. Got a set of JS carbs to go on the new build.Jug, if you still have the Mikuni it would probably be worth looking at the float valve size and the float level. With the right settings the VM and TM carbs will comfortably support 50 HP from 500 cc single two and four strokes.
What are you planning on doing with the bike? I only ask because there's nothing wrong with the VM if you don't want to use the top end of the bikes performance,it's good for town riding you get a reliable idle, good economy etc, I have used many configurations, single amal , mikuni cv34 VM 34 a VM 36 and TM 40 the TM 40 is light year's away from all the others but you have to cut a section of gusset out of the frame to fit, nothing wrong with twin amals as long as they are not completely worn out, if you want performance stick with the twin set up or a single 40mm, cheersThe ones I´ve looked at (the guy sells two) seems to be a simpler model, no accelerator pump and no push/pull cable. So the price is probably not as good as I thought....around $180 or £135 for one carb.
What are you planning on doing with the bike? I only ask because there's nothing wrong with the VM if you don't want to use the top end of the bikes performance,it's good for town riding you get a reliable idle, good economy etc, I have used many configurations, single amal , mikuni cv34 VM 34 a VM 36 and TM 40 the TM 40 is light year's away from all the others but you have to cut a section of gusset out of the frame to fit, nothing wrong with twin amals as long as they are not completely worn out, if you want performance stick with the twin set up or a single 40mm, cheers
That sounds good,if I were you I'd just buy a single manifold and fit a single concentric MK1 easy to tune,I have an almost unused SU phoenix kit on the shelf I may be tempted to part with,my bike ran really well with the CV mikuni fitted but didn't like going above 90mph without emptying the float bowl,this carb was one out of a bank of 4 from an fj1200 Yamaha I had to go up on the main jet and shim the needle , cheersThe plan is to recreate, dare I say it??? a copy, or at least as close as I can get, of my chopper (I said it!) that I built and rode for 10 years in my youth. Pure nostalgia. So I won´t be racing....I really like the idea of a single carb, easier to adjust and less stuff that can mess up. I did use an Amal MKII for a while back then, still have it in a box somewhere, and I also had a big SU or possibly a Stromberg? Don´t remember, don´t even remember how they worked, long time ago, RAM memory is almost full......