KTOG ... Kawasaki Triple Owners Group Forum Index KTOG ... Kawasaki Triple Owners Group
Welcome to “The Fellowship Of The Ring-Ding!” KTOG is a group dedicated to the famous Kawasaki S1, S2, S3, H1, H2, and KH series triples.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Join! (free) Join! (free)
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Persistent Carb issue
Page 1, 2  Next
 
Post new topic   Reply to topic    KTOG ... Kawasaki Triple Owners Group Forum Index -> Mechanical Zone
View previous topic :: View next topic  
Author Message
OhioTriple



Joined: 25 Jun 2015
Posts: 30



PostPosted: Sun Jun 18, 2017 1:13 pm    Post subject: Persistent Carb issue  Reply with quote

Hello again guys, Im back on this 1972 H1, I have rebuilt the carbs and set the float level per the mraxl info, got them sync'd up, air screws 1.5 turns out, etc. The issue I keep getting is that the bike does not want to idle and just dies unless you hold the throttle open slightly and the idle screws are pretty much maxed out(screwing them clockwise). Also, the carbs always seem to leak gas, from the overflow from what I can tell(the petcock is not on prime).

Can the float being set too high essentially cause the engine to die and bog at idle while leaking gas? I dont know why I am having so many issues with these carbs, never have on other bikes I own. Just wanting to get a list of things to work through before I take them apart for the 5,000th time. Might check the choke cable free play also before I pull them.

Thanks for any input
Back to top
View user's profile Send private message AIM Address
JohnnyO
Site Admin


Joined: 09 Jan 2012
Posts: 4947


Location: Syracuse, New York
PostPosted: Sun Jun 18, 2017 2:10 pm    Post subject: Reply with quote

Gas should not becoming out the overflow,, a good way to see whats going is to find a glass that the carb can sit on with the bowl off the carburetor,,, then set up a make shift fuel delivery system with a shut off,, run gas through the carb until the float is closed and then you can watch the gas level in the glass,,, if it rises you found your problem,,, it will show you actual float level and let you know if your needle and seat are leaking...
Be careful and use gas as water is different weight than gas..
_________________
Always remember you are unique, like everybody else...
1974 KV 75  1976 KV 75  1977 KH 400   1972 H2 750  1974 S1 Pieces and parts  
Don't take life to seriously,, you'll never get out of it alive and always be the person your dog thinks you are .....
Dale's (mraxl) AWESOME resource site http://www.kawatriple.com/
Back to top
View user's profile Send private message
BBP
Site Admin


Joined: 13 Jan 2014
Posts: 2075


Location: Dayton, Ohio
PostPosted: Sun Jun 18, 2017 7:17 pm    Post subject: Reply with quote

OhioTriple............sounds like either a leaking seat and valve.............or the floats are set to high.............or the overflow tube has a crack in it (if so, heat shrink tube on it will fix it)...........it must be flooding pretty bad seems to me

Watch the Keister rebuild kit.......supposedly the needle and seat are the only thing you can use out of the kit............best to use mikuni jets (no reason to change those unless you put pipes on it)

Jim Shreve Darth has a video on setting float level as JohnnyO mentioned, If you bent the tab, it may be float setting...........often times best left alone

also, make sure you have 1/16" slack or so on the choke plungers (a hanging choke will make it rich).........same with the throttle cable above the slides (after you get running right)
_________________
Dale's (mraxl) AWESOME resource site http://www.kawatriple.com/
Back to top
View user's profile Send private message
JohnnyO
Site Admin


Joined: 09 Jan 2012
Posts: 4947


Location: Syracuse, New York
PostPosted: Sun Jun 18, 2017 7:36 pm    Post subject: Reply with quote

Forgot about the brass tube  blackeye also check to see you have the brass washer under the main jet it will allow the needle jet to move,, just another thing to confirm...
Good luck and let us know the outcome   salut
_________________
Always remember you are unique, like everybody else...
1974 KV 75  1976 KV 75  1977 KH 400   1972 H2 750  1974 S1 Pieces and parts  
Don't take life to seriously,, you'll never get out of it alive and always be the person your dog thinks you are .....
Dale's (mraxl) AWESOME resource site http://www.kawatriple.com/
Back to top
View user's profile Send private message
12dot
Site Admin


Joined: 18 Jun 2009
Posts: 11607


Location: Minnesota
PostPosted: Sun Jun 18, 2017 8:42 pm    Post subject: Re: Persistent Carb issue Reply with quote

OhioTriple wrote:
Hello again guys, Im back on this 1972 H1, I have rebuilt the carbs and set the float level per the mraxl info, got them sync'd up, air screws 1.5 turns out, etc. The issue I keep getting is that the bike does not want to idle and just dies unless you hold the throttle open slightly and the idle screws are pretty much maxed out(screwing them clockwise).

I'm going to hope (and presume) that you just mis-typed. If you are turning the idle adjusters "clockwise", you are turning the idle screws down so you are dropping the slides further and that will decrease the idle, not increase it.


Also, the carbs always seem to leak gas, from the overflow from what I can tell(the petcock is not on prime).

Check what the other guys said above - and also check to make sure that your floats actually "float". If they have any pinhole leaks and gas has gotten inside, they will not "float" and drop down and then gas WILL continue to come in through the needle/seat valve.

Can the float being set too high essentially cause the engine to die and bog at idle while leaking gas.

Yes.


_________________
Another triple addict - you can never have enough of them

stock Kaw. triples - '69 H1 (2), '70 H1 (4), '71 H1-A (3), '72 H1-B (4), '72 H1-C (2), '73 H1-D (2). '74 H1-E (3), '75 H1-F (5), '76 KH500-A8 (3) '72 H2 (1),
non-stock Kaws. - '70 H1 w/Denco 90 hp. and dual disks,  '70 H1 w/ chrome Denco's,  1 "Yamasaki" (250 Yam. M-X'er w/Kaw. 500 engine)
other Kaws. '71 MT1 - Parnelli Jones (1), '73 MC-1 (1) - '71 A7 B (1)
Back to top
View user's profile Send private message
ALTERED IMAGE



Joined: 26 Nov 2015
Posts: 92


Location: Metamora,Mich.
PostPosted: Mon Jun 19, 2017 1:21 am    Post subject: Reply with quote

All three leak.

So all 3 probably have the exact same problem.

VM30's?

Side stand tab bent and bike leaning over too much?
_________________
Final product>>'73 H1-D
started in '78 and finished in '84.. so I thought.

'74 H1-E complete for parts.

'71H1-A engine parts
Back to top
View user's profile Send private message
Triple Cranks



Joined: 19 Sep 2010
Posts: 850


Location: Jarrettsville, MD
PostPosted: Mon Jun 19, 2017 3:07 am    Post subject: Reply with quote

Here is Jim's excellent video that Phil BBP mentioned...

http://youtube.com/watch?v=wCBzSN7UIbI
_________________
Crankshaft Rebuild Testimonials http://kawasakitriples.myfastforum.org/about7117.html&highlight=

"Let's make your crankshaft great again!" 👍
Back to top
View user's profile Send private message Send e-mail
OhioTriple



Joined: 25 Jun 2015
Posts: 30



PostPosted: Mon Jun 19, 2017 2:42 pm    Post subject: Reply with quote

Thanks for all the input so far, lots of good info for this weekend when I mess with it.

First off with the leaking, from what I can tell only the center and right side carbs were leaking. And yes, the bike is always on the side stand from what I can remember when I am running it and messing with the carbs. With the direction of lean, to the left, can this cause the center and left carbs to leak from the fuel in the bowl being tilted?

Secondly, I was turning them clockwise so that is the first screw up on my part. This linkage type idle mechanism on these older Mikuni carbs is new to me. Every single other bike I have every had/have uses the newer style.

I think at this point I am going to work up a setup like JohnnyO outlined, this way I can verify float level and see if I have a leak somewhere.

I did follow the info on here in regards to the rebuild kit, I only used the gaskets and float needle and seat. I kept the original mikuni needle, jets, etc.

I will let you guys know what happens and keep my fingers crossed. The bike seems to start right up and run good. Just got to stop the leaking, and now at least I know what my idle issue was Duh
Back to top
View user's profile Send private message AIM Address
Darth
Site Admin


Joined: 06 Jun 2011
Posts: 8540


Location: NE Ohio
PostPosted: Mon Jun 19, 2017 9:10 pm    Post subject: Reply with quote

OhioTriple wrote:
First off with the leaking, from what I can tell only the center and right side carbs were leaking. And yes, the bike is always on the side stand from what I can remember when I am running it and messing with the carbs. With the direction of lean, to the left, can this cause the center and left carbs to leak from the fuel in the bowl being tilted?

I would have to say no ... since the overflow tube is in the middle of the bowl ... it really doesn't see and "level change" ... as such.


OhioTriple wrote:
I think at this point I am going to work up a setup like JohnnyO outlined, this way I can verify float level and see if I have a leak somewhere.

If I recall correctly ... a quart size Mason jar works ... I just found that shorter one at a hobby store ... that's the one in my video.
With that setup you should be able to get the level "dialed in" ... and the leaking identified. Then, with good pilots, nice clean idle circuit passages AND a good sync ... it should idle pretty darn good ...
_________________
MY RIGHTS END ... WHERE YOURS BEGIN
Instead of  "things" ... I collect FRIENDS ... they're worth more ...
SOS ... Hello ??? ... is there anyone out there ???
Dale's (mraxl) AWESOME resource site http://www.kawatriple.com/

H1D,  S2A and a KV75
Back to top
View user's profile Send private message
OhioTriple



Joined: 25 Jun 2015
Posts: 30



PostPosted: Tue Jun 20, 2017 3:57 pm    Post subject: Reply with quote

Darth wrote:

If I recall correctly ... a quart size Mason jar works ... I just found that shorter one at a hobby store ... that's the one in my video.
With that setup you should be able to get the level "dialed in" ... and the leaking identified. Then, with good pilots, nice clean idle circuit passages AND a good sync ... it should idle pretty darn good ...


Do you remember what area that one in your vid was from? Was it for pouring wax in for a candle or something? Just wondering because it looked perfect for the job and if I have time to swing by a hobby lobby or other crafty type store I will stop in to try and find one.
Back to top
View user's profile Send private message AIM Address
Display posts from previous:   
Post new topic   Reply to topic    KTOG ... Kawasaki Triple Owners Group Forum Index -> Mechanical Zone All times are GMT - 5 Hours
Page 1, 2  Next
Page 1 of 2

 
Jump to:  
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 vote in polls in this forum

Card File  Gallery  Forum Archive
Powered by phpBB © 2001, 2005 phpBB Group