Registered Forum User
WSB Hero
Bikes: 1993 - 944SS & Aprilia Falco
Posts: 7,795
Join Date: Oct 2002
Location: north east
Sorry to hear of the on-going saga with your 900.
If it was me, I 'd now be taking the carbs apart myself to check and of course, the float bowls should come off real easy since its been done recently!
Worn needles + wrong settings
Emulsion tubes worn.
Diaphragms
Float height settings
Carb balance
are all among the things I'd be checking.
Plugs and plug colour is a nice easy check to do.
Are you also saying there is no mis-fire from cold?
Good luck - Frank