carb help..

[motocycle shawn]

ok guy i need some brain power. i have too sets of carbs one set are stock cv gs750e carb's the other set are mikuni's think there called smooth bore's..
all i know is one set is run off the vac on intake and the othere is not.. plus with the smooth bores are faster from idle to full power .. a faster turn then the stock one's that feel im turning the grip much more..
what set is better for street/dragbike and why. i dont know much about carbs..

thanks

[motocycle shawn]

carb help ...

can any one tell me witch once to use?

[Mark whiz]

As you stated, smoothbores are controlled directly by the throttle, while CV carbs respond to vacuum changes - this gives them a little smoother transition, but a slower responce to throttle changes when compared to smoothbores.

For racing purposes the smoothbores are the way to go.

[Billy Ricks]

As long as you roll the throttle instead of just yanking it open as you do with CVs the smoothbores will behave themselves on the street.

[motocycle shawn]

Carbs

OK. so with that said. why do i have to turn the grip less with the somoth bore's. it feels like i have more power with the cv and more topend

[Billy Ricks]

If you yank the throttle open with smmothbores you lose intake velocity and the bike will bog. If you're up in the rpm range yanking the throttle open isn't a big deal, but down low all you'll get is a little burping and lose speed. That doesn't happen with CVs because vacuum raises the slides, not the wrist. The RS flatslides I use on my bike deliver way more power than the stock CVs did. You just have to be careful and roll the throttle on. If you're making more power with CVs the smoothbores are either jetted wrong or need a good cleaning, or both.

[motocycle shawn]

Carbs

i think its got 112.5 jets
with a 4-1