This guide is pretty much the same for mikuni 22mm carbs found on most minibikes too.... although we know the best jetting settings for those carbs already...
The VM26 being so big and on the limit of over size are a bit harder to tune as for each bike its different.... This will help you diagnose and understand the carburetor in full detail.
VM26 owners Free Tuning manual same as ebay item
Linear Mode
