Mikuni 38mm roundslide issues

Not trying to tell you what to do with your bike, but you should be aware that bigger carburetors are touchier to tune, and you're right at the limit. Apart from gggGary's experiment, the only VM38s I've seen or heard of on XS650s have been on full race 750 motors set up for mile flat track, fast road race tracks, and drag racing. Low rpm operation will definitely suffer, no matter how carefully you tune. You might think about looking for a buyer or for someone who'll swap for a VM34.
Advice has been accepted. Not gong to fight it anymore. It was a pipe dream. Going back to a set of BS 38’s. They always ran good for me before and at my age will provide all the speed i need! Thanks gentlemen. Been a real learning experience. Now one last thing, where’s the market for a couple of VM 38’s?
 
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