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How can I make these RS34's work?

  • Thread starter Thread starter Gearz
  • Start date Start date
G

Gearz

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So I bought a 79 gs750 that had a brand new set of RS34 Carbs on it. I could never get the thing to run well and found out they are too big for my bike. I did some searching and found that I could possibly get them to work if I put 850 jugs and all that onto the motor. Can anyone tell me what all I will need to do to get the bike running with these carbs? I thought about just selling them and getting stock carbs to get the bike running, but these carbs are badass and I'm not opposed to some extra work for some extra CC's
 
TxGSrider said:
Right here is probably what you need: http://www.thegsresources.com/_foru...-Canadian-gsxr-750-1985-87-VM29SS-carburetors
Maybe he'd do some trading with you.
Click to expand...


Chuck78 said:
Marc is very correct. These are called VM29SS, by have NOTHING to do with VM26SS carbs nor VM29/VM33 smoothbores. They are actually an "SS" (special set) of 4 high performance 33(?)mm dirtbike carbs in a 4 cylinder rack, but the front of the venturi that bolts on restricts it to 29mm. Some people bore these out to 33, some leave as is. They are rare, and sought after for performance.
I want to say they are a 4 cylinder racked special set of TM33 dirtbike flatslides. Not CV flatslides like most other bikes 1980+, they are direct linkage. Performance...
Click to expand...

Probably still too much carburetor for an 8V 750.


http://www.thegsresources.com/_foru...5-87-VM29SS-carburetors&p=2430182#post2430182
 
I'd think a 29mm carb with accelerator pump would be fine on a 750... even an 8 valve. But you're right, it probably doesn't "need" anything larger than a 26mm non-cv style carburetor.
 
I have a 77 GS750 with a built yoshimura 844cc top end including yoshi cams, hardened valve springs and retainers, ported and polished head and yoshi 4-1 exhaust. I'm running VM26 with pods, 117.5 mains, needle and needle jet from a gs1000 and it absolutely rips, pulls past redline in top gear if I'm not careful. I'm going to try VM28's soon but I'm skeptical if I will see any improvements as the intake air velocity will be reduced and roll on torque will suffer.
 
Last edited:
Thanks for the replies, Kochic I sent you a PM to see if we can work something out.
 
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