switching from single to dual carbs

D-Roc

D-Roc

I forgot!
Location
Dirty River Rider
Lets say i was to switch from a single riva powerbomb 48 with the following jetting:

Main Jet: 135
Pilot:150
N & S: 2.5
Spring: 115g
pop off = 20-22

to a dual 48 powerbomb carb setup how much would i have to rejet each carb? I am thinking that with the current jetting for single it may be too rich if i run it as a dual, but then again if it is currently mixing the right amount of fuel with the amount of air that it lets in, it may not need much of a re-jet. Really i don't know so any input would help.
 
scotts2t

scotts2t

Head Woop!
Location
Lake Erie
I'm doing the same. Can anyone chime in if they run dual powerbombs on a ported piped 735 Yamaha. Looking for some base specs to get me started. Carb database has very little info with regards to dual powerbombs.
 
B_RAD_BALLA

B_RAD_BALLA

Location
martinez, ca
I Can't imagine dual 48s are going to help much if at all for a 735. dual 38s run super strong even on a 760. I'm running a single 48 powerbomb on my ported 760 and I can flatwater flip it all day. I suspect adding another will just make it hard to tune and probably load up. That's just my uneducated guess lol. I have definitely though about running duals as a stepping stone to a bigger motor but this thought holds me up. I recall someone else posting about trying to dial in their duals on a small bore motor and giving up/selling the carbs and going back to a single.

Best of luck
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
That is way too much carb for a 735. Not saying you cannot get them to run right, they will, friend has them. But you are not getting the best performance.
 
You must log in or register to reply here.
Top Bottom