Kawi2strokes.com Forum

Enthusiasts from around the world dedicated to the preservation and ritual flogging of the infamous Kawasaki 2-stroke Triples
It is currently Wed Apr 30, 2025 11:14 am

Board index » Our legendary Kawasaki Triples » Restoring your old gal, all shiny like when she was new

All times are UTC - 5 hours




Post new topic Reply to topic  Page 2 of 2
  [ 20 posts ]  Go to page Previous  1, 2
  Print view Previous topic | Next topic 
Author Message
mraxl
 Post subject: Re: Carb Question
PostPosted: Fri Feb 02, 2024 1:46 pm 
Site Admin
User avatar

Joined: Tue Jun 07, 2011 6:36 am
Posts: 2714
Location: Dandridge, TN, USA
The gasket is there for a reason.... I've seen high revs on Suzukis and Kaws when loose cap was the cause.... nothing to do with cable.

_________________
Answers are here: http://kawatriple.com/
Top
 Profile  
 
ALTERED IMAGE
 Post subject: Re: Carb Question
PostPosted: Sat Feb 03, 2024 8:19 am 
User avatar

Joined: Sun Sep 06, 2015 6:01 am
Posts: 335
Location: Metamora, MI
Carb sure looks like a H1 with tophat and cap with seal needed.
cliff
Top
 Profile  
 
Goodwrench
 Post subject: Re: Carb Question
PostPosted: Sat Feb 10, 2024 9:30 am 

Joined: Sat May 23, 2020 4:41 am
Posts: 198
Location: Morgantown WV USA
Hi Cliff
I agree that the notch in the carb body is the same as an H1 carb.
I confirmed that my carbs are all stamped S2U-0 which is correct for an S2A
Top
 Profile  
 
ALTERED IMAGE
 Post subject: Re: Carb Question
PostPosted: Sat Feb 10, 2024 3:42 pm 
User avatar

Joined: Sun Sep 06, 2015 6:01 am
Posts: 335
Location: Metamora, MI
Seal IS for anti-rotation that prevents cap loosening.
It also minimizes air leak. Along with the tight fitting throttle cable ferrule.

No vacuum? It is trying to equalize vac under the slides to air pressure. So NO.

It does effect mixture.

cliff
Top
 Profile  
 
kc15842
 Post subject: Re: Carb Question
PostPosted: Fri Apr 12, 2024 10:40 pm 
User avatar

Joined: Thu Mar 14, 2024 4:11 am
Posts: 55
Location: California
mraxl wrote:
The gasket is there for a reason.... I've seen high revs on Suzukis and Kaws when loose cap was the cause.... nothing to do with cable.

The manual does not show a gasket for the cap, does someone know the part number or is it part of the cap? I guess I should clarify it's for an H2B, thanks
Top
 Profile  
 
mraxl
 Post subject: Re: Carb Question
PostPosted: Sat Apr 13, 2024 6:05 am 
Site Admin
User avatar

Joined: Tue Jun 07, 2011 6:36 am
Posts: 2714
Location: Dandridge, TN, USA
I can't find a part# or source but you could make one.
Use an old innertube and cut to fit snug inside of cap... a ring about 3/16 wide.

_________________
Answers are here: http://kawatriple.com/
Top
 Profile  
 
kc15842
 Post subject: Re: Carb Question
PostPosted: Sat Apr 13, 2024 1:08 pm 
User avatar

Joined: Thu Mar 14, 2024 4:11 am
Posts: 55
Location: California
mraxl wrote:
I can't find a part# or source but you could make one.
Use an old innertube and cut to fit snug inside of cap... a ring about 3/16 wide.


Thanks for looking
Top
 Profile  
 
ALTERED IMAGE
 Post subject: Re: Carb Question
PostPosted: Sun Apr 14, 2024 1:01 pm 
User avatar

Joined: Sun Sep 06, 2015 6:01 am
Posts: 335
Location: Metamora, MI
0120raptor wrote:
mraxl wrote:
0120raptor wrote:
The slot is at atmospheric pressure so it will never leak air. It`s not under any engine vacuum. You could unscrew the top completely and it won`t make any difference.

I disagree! Slot is not a problem but a loose cap will make it rev to the moon. Been there- done that.

I`m not suggesting remove the cap and run the engine. I mean you could THERORETICALLY remove the cap and assuming the slides don`t move the engine won`t suck in any more air.


Underside of Cut Away (CA) does not have same air pressure than atmosphere.
Especially at part throttles.
Air leaks at low throttle from the jet needle hole/e-clip/cable end.

cliff
Top
 Profile  
 
H2RTuner
 Post subject: Re: Carb Question
PostPosted: Sun Apr 14, 2024 3:28 pm 

Joined: Thu Jun 09, 2011 11:25 am
Posts: 3156
Two different types of carb tops

One has an insert for the inner cable holder, and idle shaft, and a setting ring to hold it all in place

The other is as you show, screw on, one piece.

Both use a thin rubber "gasket", not sealed.

If that area was sealed, the slide wouldn't be able to rise in the body.
Top
 Profile  
 
ALTERED IMAGE
 Post subject: Re: Carb Question
PostPosted: Sun Mar 23, 2025 9:28 am 
User avatar

Joined: Sun Sep 06, 2015 6:01 am
Posts: 335
Location: Metamora, MI
It's never sealed.
Pressure on top of CA is not the same as bottom of CA.

The rubber seal is for anti-rotation and sealing top of CA from atmospheric pressure, although not really important except for highly tuned carbs for like engines.

So pressure on top is equalized to pressure on bottom via cable slot and a little by the JN top.
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 2 of 2
  [ 20 posts ]  Go to page Previous  1, 2

Board index » Our legendary Kawasaki Triples » Restoring your old gal, all shiny like when she was new

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group