CVK40 Pumper install - Page 3 - Kawasaki KLR 650 Forum
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post #21 of 54 Old 03-30-2013, 08:49 PM
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Never pass up the opportunity to stand in a river and wave a stick.

Geez, that would make a good book title...

T

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post #22 of 54 Old 03-30-2013, 08:56 PM
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Never pass up the opportunity to stand in a river and wave a stick.

Geez, that would make a good book title...

T
I do that all the time. Drives the fishermen NUTS!!
jj

It's not a Tractor....It's a LOCOMOTIVE!! Chugga Chugga
Woooo WOOOOO!!!!!
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post #23 of 54 Old 03-30-2013, 09:06 PM
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Never pass up the opportunity to stand in a river and wave a stick.

Geez, that would make a good book title...

T
OK Lockjaw, your up.
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post #24 of 54 Old 03-30-2013, 09:44 PM
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Because the pump arm is moved by the spring over the pushrod, a smaller orifice would lengthen the duration of the shot, a smaller amount over a longer time. This is assuming a reasonably large throttle movement. With small throttle movements the amount of fuel delivered per movement would be reduced. You could also go with a lighter spring to reduce the fuel delivery per movement. Limiting the travel of the arm would also reduce the amount of fuel delivered. A limiting screw to stop the downward travel of the pump arm would work for this. It could be mounted from the right front bowl screw and be pointing up to the bottom of the pump arm and be adjustable.
Just some thoughts I had while looking at your pictures of the carb.
Regards....justjeff

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post #25 of 54 Old 03-31-2013, 05:45 AM Thread Starter
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Good points and well explained. The arm(rod) travels with the travel of the cable so limiting it maybe an issue. I'll look into it some just to learn more.
The squirt amount was something I thought might be an issue due to the difference in engines. As it's going now,it may not be an issue at all. Some good options to play with if needed.


Quote:
Originally Posted by Tom Schmitz View Post
Never pass up the opportunity to stand in a river and wave a stick.

Geez, that would make a good book title...

T
Maybe next weekend I'll stand in a stream and wave my stick.

Last edited by MacG; 03-31-2013 at 05:51 AM.
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post #26 of 54 Old 03-31-2013, 09:30 AM
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Good points and well explained. The arm(rod) travels with the travel of the cable so limiting it maybe an issue. I'll look into it some just to learn more.
The squirt amount was something I thought might be an issue due to the difference in engines. As it's going now,it may not be an issue at all. Some good options to play with if needed.




Maybe next weekend I'll stand in a stream and wave my stick.
Just for clarification : The part I am calling the "pump arm" is the lever which runs horizontally above the float bowl. It is connected to the floatbowl near the center. The pushrod connects from above and has the spring on it. When the pump arm stops the pushrod can continue to travel and the spring would be compressed.
If anyone knows the correct part names, chime in so we can all be using the same terms!
Regards....justjeff

It's not a Tractor....It's a LOCOMOTIVE!! Chugga Chugga
Woooo WOOOOO!!!!!

Last edited by justjeff; 03-31-2013 at 09:32 AM.
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post #27 of 54 Old 03-31-2013, 09:55 AM Thread Starter
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Just for clarification : The part I am calling the "pump arm" is the lever which runs horizontally above the float bowl. It is connected to the floatbowl near the center. The pushrod connects from above and has the spring on it. When the pump arm stops the pushrod can continue to travel and the spring would be compressed.
If anyone knows the correct part names, chime in so we can all be using the same terms!
Regards....justjeff
OK,I got it. I thought you meant the rod that actually goes through the spring..my bad.
Here is a link to the carb diagram that may be handy CVK40 pumper
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post #28 of 54 Old 03-31-2013, 10:03 AM
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OK,I got it. I thought you meant the rod that actually goes through the spring..my bad.
Here is a link to the carb diagram that may be handy CVK40 pumper
No worries mate. It's all good! I just called it the "pump arm" because it doesn't seem to have a name in the diagram.
Regards....justjeff

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Woooo WOOOOO!!!!!
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post #29 of 54 Old 03-31-2013, 12:08 PM
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Quote:
Originally Posted by justjeff View Post
Just for clarification : The part I am calling the "pump arm" is the lever which runs horizontally above the float bowl. It is connected to the floatbowl near the center. The pushrod connects from above and has the spring on it. When the pump arm stops the pushrod can continue to travel and the spring would be compressed.
If anyone knows the correct part names, chime in so we can all be using the same terms!
Regards....justjeff
The Harley Hog Keihin CV carburetor treatise accessible from the following link may be useful (scroll down the the bottom, to "Accelerator Pump"):

http://jwvess00.home.insightbb.com/jay/1200s/cv/

Reference 46102 in the previous fiche, "Rod, Accelerator Pump' may be called, "Throttle Rod" in the Harley Keihin article.

Otherwise, the discussion prior to the Accelerator Pump section seems applicable to the plain ol' non-pumper CVK40s.
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post #30 of 54 Old 03-31-2013, 12:22 PM
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Thanks Damocles,
It is odd that the exploded parts diagrams don't seem to have float bowl or lever arm identified or numbered.
jj

It's not a Tractor....It's a LOCOMOTIVE!! Chugga Chugga
Woooo WOOOOO!!!!!
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