stock Mikuni vs flat slides

[nastyjones]

I have heard that the main difference between the stock set of carbs & flat slides is that flat slides are capable of producing more power. I also heard they are infinitely more adjustable as they do not have vacuum slides.
What are some other differences. Are they simpler? Less parts?

[chef1366]

I do believe the venturi is designed to speed up the air more than stock CVs.
They have accelerator pumps to stop the instant vacuum black hole
The slides rise faster for quick throttle response

[gearhead13]

They make more HP when tuned right. There is no butterfly to restrict the flow. They rattle and are harder to sync. They are a totally different setup than cv carbs. Less streetable.

[posplayr]

They make more HP when tuned right. There is no butterfly to restrict the flow. They rattle and are harder to sync. They are a totally different setup than cv carbs. Less streetable.

Katman and RapidRay claim the carbs are quite streetable.

Gearhead how is the 1327 coming?

I have some sets of GSXR CV flatslides and they rattle quite a bit more than the std CV's

[chef1366]

Katman and RapidRay claim the carbs are quite streetable.

How is the 1340 coming?

He doesn't think that popping a wheelie in each geat between lights is streetable.

[gearhead13]

The 1327 is running gr8, wide open in 4th and the front end get real light and the rear end squats bad. I dont open it up in the first 2 or 3 gears. They are streetable, just not as smooth as cvs. Just trying to fix some oil leaks that i get at high rpm.
When I had the cams at 109 in and 108 ex it wheelied much easier, like part throttle in 1st and 2nd, not as much with the intake at 106, but more top end it seems

[posplayr]

The 1327 is running gr8, wide open in 4th and the front end get real light and the rear end squats bad. I dont open it up in the first 2 or 3 gears. They are streetable, just not as smooth as cvs. Just trying to fix some oil leaks that i get at high rpm.
When I had the cams at 109 in and 108 ex it wheelied much easier, like part throttle in 1st and 2nd, not as much with the intake at 106, but more top end it seems

I'm guessing the RS's are a streetable as a race carb can be.

What mains did you end up with?

[Homie]

I do believe the venturi is designed to speed up the air more than stock CVs.
They have accelerator pumps to stop the instant vacuum black hole
The slides rise faster for quick throttle response

Its not so much the design of the venturi as it is the slide itself. The RS carbs have flat faced slides which create a stronger vacuum signal than the round slides for the same amount of slide opening which results in better throttle response.

Pehaps the most obvious difference (at least to me) besides the improved performance, is how much faster your gas tank goes to reserve as opposed to the CV carbs!!

[chef1366]

Its not so much the design of the venturi as it is the slide itself. The RS carbs have flat faced slides which create a stronger vacuum signal than the round slides for the same amount of slide opening which results in better throttle response.

Pehaps the most obvious difference (at least to me) besides the improved performance, is how much faster your gas tank goes to reserve as opposed to the CV carbs!!

Homie
You're a real piece of work.

[BlackStar]

No problems on the street here, but my motor is pretty tame. Easy to tune RS's

[gearhead13]

I'm guessing the RS's are a streetable as a race carb can be.

What mains did you end up with?

I am running 130 mains now, I think I need to go a bit smaller.

[JimmyR]

I have an '82 GS1100G, which has just 2 valves per cylinder and is designed as a tourer. I ran it for a while with the stock carbs and airbox, but then I am ran it with Mikuni RS36 flatslides and K+N pods. It ran really well like that and seemed similar to stock except maybe a bit faster to respond to the throttle.

Then I had the valves reseated and new seals installed and new rings put on the pistons. The compression was good before I did all this but it was leaking oil through the valves. I didn't think it would make so much difference but now the bike is amazing. It's like a bullet. The acceleration from stopped is almost frightening. It's also capable of being ridden like a boring commuter too. Maybe not as silky smooth as the CV carbs but no trouble either. I have no problems with riding in stop start traffic.

And synching is not so tricky once you understand how they work. I find the trick is to bench synch them accurately first, and then keep a wrench on the adjuster the whole time. Without a wrench it is very difficult. With a wrench it's no harder than CVs.

Now I have mine tuned I couldn't go back to CVs. The rattle takes some getting used to but once tuned well it's not so bad. Reminds me of old British sports cars.

[bensuzuki]

No problems on the street here, but my motor is pretty tame. Easy to tune RS's

That is 1 good looking gs!

[twotimeGSr]

Those appear to look more like my VM carbs than CV carbs. Are there similarities between the flatsides and the VMs?