GS1085: RS 34 Flatside vs VM33 Smoothbore?

[suzukiguybri]

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.

[BadBillyB]

I am interested in any comments/experience from anyone running VM33's with 1.5 slides in the GS1085. Trippivot?

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

[kochic]

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

[stain]

I am running 1989 GSXR1000 36mm carbs on my 1085 with some pretty good results. Ported and cut head with Web cams

[srsupertrap]

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 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. . 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

[trippivot]

don't worry 1.5 or 2.0 does not matter. you can argue with my statement, and try to tune it out yourself BUT!!!

the things (VM racing) DO NOT idle for a darn after closing the throttle slides... period. 1/4 throttle up acellerating GREAT!!!!

chop the throttle and you'll have to babysit, until it calms down no matter what tune you have..

race carbs are cool after you are on your way-- VM33 never work stop and go...emphasis on stop

CV's are for that. but knowing and accepting it as a fact = race/street -- oil/water you can be at ease when it acts like a child with ADD.

be calm it is only gas and air not mixed right at low idle speed.

[davel]

I cry BS!!! No WAY that torque number!!! Ray.

Assuming an engine is in a good state of tune with good volumetric efficiency, Peak torque can be estimated from displacement and CR. A 1000CC engine with 9:1 CR will make about 55lb*ft of peak torque (measured at the rear wheel). Torque will increase proportional to displacement. Each point of compression will add an additional 10%. So 1166CC w/10.5:1CR should produce about 75lb*ft.



This list was compiled from various sources:


1979 Kaw KZ1000 – 1015CC w8.7:1CR = 52lb*ft
1982 Suz GS1100 – 1075CC w9.5:1CR = 62lf*ft
2005 Suz Bandit 1200 – 1157CC w9.5:1CR = 70lb*ft
2009 Suz GSXR1300 – 1340CC w12.5:1CR = 97lb*ft
2010 BMW S1000RR – 999CC w13:1CR = 80lb*ft
2010 Duc 1198R – 1198CC w12.8:1CR = 90lb*ft

[srsupertrap]

don't worry 1.5 or 2.0 does not matter. you can argue with my statement, and try to tune it out yourself BUT!!!

the things (VM racing) DO NOT idle for a darn after closing the throttle slides... period. 1/4 throttle up acellerating GREAT!!!!

chop the throttle and you'll have to babysit, until it calms down no matter what tune you have.. .

By Do Not Idle after chopping throttle do you mean . . .

1) Hanging idle and eventually drops to 1000-1100 rpm
2) Bike actually stalls after chopping throttle?

[blowerbike]

all of thee above is why i like the RS series mikuni's over the round slides.
they are dummy proof

[srsupertrap]

Anyone's have experience with GSXR Flatslide Carbs

Does anyone have any seat of the pants experiece with installing /riding GSXr 750 Factory Flatslide carbs on their big bore GS1100 or GS1000? I have been searching around the http://www.suzukicycles.org/All-Suzu...ki_models.html and from what I have been reading the 85-87 GSXR 750 came equiped with VM29 Flatslide carbs. The 88 GSXR 750 had 36mm contant-velocity semi-flatslide carbs while the GSX-R750R limited edition model had 40mm Slingshot carburetors. The 90 GSXR 750 was equipped with 38mm carbs. Not sure what kind those were? It seems Suzuki couldn't make up their mind on the GSXR carbs? But then again this was at the same time they designed the Madura.

Any guidance on which one I should seek out and which one I should avoid would be appreciated.

[blowerbike]

i have a set of 33 errr ish from an 85 err umm 86 ish GSXR 750.
this bike was safety wired and and glass body parts and was road raced..
i need to measure these...they are vacuum flat slides and look like the 34mm's but for sure smaller than the 86-88 GSXR 1100/88-93 katana 1100(34mm)..
maybe i should go and measure these right now.
some of the info you posted was close but not all 100%
maybe the 1998 you stated was a typo..supposed to be 1988 instead.

[blowerbike]

ok i have a complete set of 31mm vacuum flat slides..
the bike they came from was titled as a 1985 GSXR 750.

[mac1170]

no way

I cry BS!!! No WAY that torque number!!! Ray.

i run an 1170, with 36rs mics, and put out 86ft/lbs, it wheel stands, in 3rd, no way, are those numbers right.

[kochic]

The canadian version had mikuni mecanical flatslide stock.The 1986 i owned had these.
My friend still have the bike, i can probably borrow the carbs rack to give it a try on my 1000.
Marc

[srsupertrap]

ok i have a complete set of 31mm vacuum flat slides..
the bike they came from was titled as a 1985 GSXR 750.

I fat fingered the 98, should be 88? I pulled that information from http://www.suzukicycles.org/All-Suzu...ki_models.html

So what did you have 31 Vacuum flat slides mounted on, do they fit under the tank and most importantly do you believe they are a good upgrade for a GS1085 2V or GS1100 4V?