Strip off the stock cables and choke stuff and chuck them into the cornfield. Venhill cables transformed smoothness and no lube required. There are capping screws for the old choke cable entry holes to plug 'em. Another idea ,it is possible to accidentally fit carb top covers spun backwards producing a not so linear up down pulling action creating slight drag. Fit extended tickler kit in lieu of stoopid chokes , overflow on a cold morning startup for first kick action ( like today for 0 degree Celcius start n' warmup, then short drive over to winter cocooning cave). Sort out the new cables and their smoothest direct routing path ,junction box ,twistgrip tightness and life will be sweet again. peter