Senior VR Member
Join Date: Sep 2002
Location: Berkshire, UK
Thanked 6 Times in 5 Posts
With open pipes, I'd start with a 200 jet, or maybe a 170-180 if you have baffles in there still. A lot depends on temperature and altitude, too, though I recommend the air line from the back of the Hypercharger to the float bowl (that is a standard trick on the Yamahas with Hyperchargers, I understand).
Just run it and see how the spark plugs look - nice and grey/brown is what you're aiming for. Sooty black and you're too rich, white and you're too lean and burning the plugs. It isn't rocket science.
Before you ask, it's just a thumbnail...
Lord Wiggo of Berkshire. Archbodger of Volusia