Join Date: May 2008
Motorcycle: 87 GSXR 7/1216
Re: opting not to drill slides- dynojet????
give it a shot. the worst that will happen is you might have a flat spot here or there. With this kind of CV carb, the rate of slide lift controls the amount of accel enrichment you get, that's why there is no accelerator pump. So by changing the slide lift speed you're changing the 'size' of the accel pump hit, faster = leaner but the engine can rev up faster. Slower = richer but the engine might bog or accelerate slowly.
Like everything else it's a tradeoff. Me personally I would give it a shot without drilling them. You could also call Dynojet but don't expect to get an especially helpful answer.
Factory pro, incidentally, leaves the slides stock but tailors the speed with a different spring.
Gives you something to think about - if you have a spare set of springs you could stretch them for more preload or cut them down to get different slide opening/enrichment curves.