• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

GS1085: RS 34 Flatside vs VM33 Smoothbore?

srsupertrap

srsupertrap

Forum Sage
Past Site Supporter
Which of these two carbs are the better choice for GS's? I have been looking for a set of RS 34 Flatslides's but a set of VM 33's S/Bores fell into my lap. I have heard the VM 33's don't carbureate as well on street bikes as the VM29's. So, what's your experience with these two Carbs . . . should I keep looking for the RS 34's?
 
Last edited:
General oppion is 29's are better for the street, the 33's will be almost just as good but the flatslides have a more abrupt delivery over the round slides. Had 33's for mine but a "mate' sold them on me for his habit so running 29's now. Would be using the 33's if i had them. Buts thats just me.
 
sharpy said:
General oppion is 29's are better for the street, the 33's will be almost just as good but the flatslides have a more abrupt delivery over the round slides. Had 33's for mine but a "mate' sold them on me for his habit so running 29's now. Would be using the 33's if i had them. Buts thats just me.
Click to expand...

Happen to recall your VM33 baseline setting/jetting?
 
If you buy the vm33, check if the throttle slide are kawasaki or suzuki.
i have spec of the base jetting here, i will check that today.
Like blowerbike said you can beat the sound of the rs at idle.
marc
 
I already have a set of VM33's which came off a GS1000 drag bike. Just started opening them up today: the mains are #130, 1.5 Slides has a push pull throttle set up. Need a thorugh inspection, cleaning & new screws.

I didn't know about the RS clickety sound. Please explain further
 
Last edited:
the flat slides pulse back and forth against the carb body's and make a clicking sound at idle..
very coooool as long as a person doesn't think there valves need adjusted or somethings wrong with the engine.
 
Either one could be bolted up to a STOCK 16 valve 1100/1150 motor& run great but if you are putting them on an 8 valver, it BETTER have some work done to it! Ray.
 
blowerbike said:
the flat slides pulse back and forth against the carb body's and make a clicking sound at idle..
very coooool as long as a person doesn't think there valves need adjusted or somethings wrong with the engine.
Click to expand...

Was going to mention that "rattle" about those flatslides. Not a big fan of noisy extras unless its a dry clutch setup. But thats very very rare on a suzuki.
 
sharpy said:
Was going to mention that "rattle" about those flatslides. Not a big fan of noisy extras unless its a dry clutch setup. But thats very very rare on a suzuki.
Click to expand...
SR, Perhaps we could get together sometime, I'm in Boulder, & have a 81 GS1100E ( wisco 1168 10.25-1,webcam WSG338 cams,( flowed by Tom Wirth of Mountain Machine.) Yosh (race 4-1) & misc. I have run,29 smoothbores,33 smoothbores, & now running a set of 750 GSXR slingshots ( I believe they are 36mm). and am VERY happy with them. performance is seamless & seemingly un affected by changes in altitude/temp. spirited riding on Peak to Peak renders @ 50mpg avg Corrected Dynojet readings are 133 HP w/110 lbs torque. If intrested, PM me. & maybe we can swap bikes for a couple miles.. G
 
gane said:
SR, Perhaps we could get together sometime, I'm in Boulder, & have a 81 GS1100E ( wisco 1168 10.25-1,webcam WSG338 cams,( flowed by Tom Wirth of Mountain Machine.) Yosh (race 4-1) & misc. I have run,29 smoothbores,33 smoothbores, & now running a set of 750 GSXR slingshots ( I believe they are 36mm). and am VERY happy with them. performance is seamless & seemingly un affected by changes in altitude/temp. spirited riding on Peak to Peak renders @ 50mpg avg Corrected Dynojet readings are 133 HP w/110 lbs torque. If intrested, PM me. & maybe we can swap bikes for a couple miles.. G
Click to expand...

so you ran 29's on a 16 valve 1100???
thats odd.
 
Corrected Dynojet readings are 133 HP w/110 lbs torque.
Click to expand...

110ft/lb or 110Nm? 110ft/lb seems like an awfully high torque figure. Not saying it'd be a bad thing to have though, hahaha.

- boingk
 
1.5 is the kawi slide, the suzuki slide is 2.0.
both run.Almost all vm33 we see for sale listed gs1000 came off KZ.
Marc





srsupertrap said:
I already have a set of VM33's which came off a GS1000 drag bike. Just started opening them up today: the mains are #130, 1.5 Slides has a push pull throttle set up. Need a thorugh inspection, cleaning & new screws.

I didn't know about the RS clickety sound. Please explain further
Click to expand...
 
I see, I found the VM33 recommended jetting at the bottom of this page
http://www.cyclewareables.com/pages/mikuni_vm33mm_smoothbores/mikuni_vm33_mikuni_parts.htm
Tried pasting the chart but lost all the formatting.

I am not sure if the VM33 1.5 Slides will work in Denver. My previous experience was I had to swap out the 1.5's in my VM29 with 2.0 slides to make them work at altitude. A 2.0 Slide allows more air flow so I am thinking the 1.5 will make it stumble, cough or something. Yet the guy I bought them from had them installed on a GS1000 dragbike, He didn't strike me as too mechanically inclined. You can ask Tkent02.

I am interested in any comments/experience from anyone running VM33's with 1.5 slides in the GS1085. Trippivot?
 
Last edited:
I am trying to line out a set of VM33's on my 82 gs1100. If i was not bald already i would be pulling my hair out. I will be paying close attention to this thread.
 
srsupertrap said:
I am interested in any comments/experience from anyone running VM33's with 1.5 slides in the GS1085. Trippivot?
Click to expand...
Theres more to it than just the slide being a factor. The carbs that were set up for a Kawasaki also had different air jets in them....the one in the throat.....Best to try and find the right ones for the app......Billy
 
you can see the baseline at the bottom.Last time i checked i think the slide was like 150-175$ ea.Sorry about the size.
marc
expvm33.gif
 
I am running 1989 GSXR1000 36mm carbs on my 1085 with some pretty good results. Ported and cut head with Web cams
 
BadBillyB said:
Theres more to it than just the slide being a factor. The carbs that were set up for a Kawasaki also had different air jets in them....the one in the throat.....Best to try and find the right ones for the app......Billy
Click to expand...

You are certainly right, different air jets as well but they only cost as much as pilot jets (3.00 -4.00 Ea). A new VM slide is $195 each. :eek:. Maybe I will get luck and find a set of VM33 2.0's . . anyone? :)

When I swapped out the VM29 1.5 slides, I found a gouged set of 2.0's which I had nickel plated at one of the my former suppliers. It was quite a process strip, buff down, Brass plate, nickel plate, mask so it does not go here. They got it right but it took a long time. Perhaps I will just sell the VM33's on FleaBay
 
Last edited:
You must log in or register to reply here.
Back
Top