CV Carb Tuning
Thread Starter
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Grand HDF Member
Joined: Oct 2006
Posts: 3,651
Likes: 705
From: DFW
The little ball? Please explain this further for me. Thanks.
Thread Starter
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Grand HDF Member
Joined: Oct 2006
Posts: 3,651
Likes: 705
From: DFW
Still having same issues with bogging down when twisting the throttle (it idles ok).
@ SPanners: Took out the spring and needle and had same bogging problem.
@ Mia: The "silver item" can only go in one way, otherwise I could not get the emulsion tube / main jet holder to thread into the carb.
I pulled the carb apart, cleaned everything and used carb cleaner to squirt through the orifices - no apparent blockage / clogging. My previously new float bowl gasket is ripped, but I do not have gas leaking in that area.
I installed a 48 slow for S's & G's - same bogging as before.
I am thinking I have a leak at the manifold gasket area where it mates to the cylinders.
More fun for tonight. lol
@ SPanners: Took out the spring and needle and had same bogging problem.
@ Mia: The "silver item" can only go in one way, otherwise I could not get the emulsion tube / main jet holder to thread into the carb.
I pulled the carb apart, cleaned everything and used carb cleaner to squirt through the orifices - no apparent blockage / clogging. My previously new float bowl gasket is ripped, but I do not have gas leaking in that area.
I installed a 48 slow for S's & G's - same bogging as before.
I am thinking I have a leak at the manifold gasket area where it mates to the cylinders.
More fun for tonight. lol
Last edited by GREENOHAWK69; Sep 7, 2012 at 06:09 AM. Reason: wrong word
Road Master
Joined: May 2008
Posts: 803
Likes: 3
From: Collegeville, PA
Greenhawk, the 'silver item" or needle jet goes in very easily the wrong way, and is a very tight fit to seat the right way. If the internally beveled edge isn't facing up into the venturi, you have it upside down and will have just the symptoms you are talking about. It will go in correctly, it just takes patience to seat it as it is a very tight fit.
Thread Starter
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Grand HDF Member
Joined: Oct 2006
Posts: 3,651
Likes: 705
From: DFW
This is the "silver thing" that is installed before the emulsion tube / main jet holder - the needle also "slides" into it.
I have it installed with the shorter end facing up (narrower opening) - see pic #1 (in palm) and pic #3. Tried installing with longer end (larger opening in pic #2) and I could not get the emulsion tube / jet holder to screw into the carb.
Already installed a 48 slow...still bogs. This is just in my garage, I get it to idle, but bogs when twisting the throttle - no actual riding yet.
I have it installed with the shorter end facing up (narrower opening) - see pic #1 (in palm) and pic #3. Tried installing with longer end (larger opening in pic #2) and I could not get the emulsion tube / jet holder to screw into the carb.
Already installed a 48 slow...still bogs. This is just in my garage, I get it to idle, but bogs when twisting the throttle - no actual riding yet.
Last edited by GREENOHAWK69; Sep 7, 2012 at 06:34 AM.
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Club Member
Joined: Apr 2011
Posts: 5,776
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From: SE Louisiana
Searched for information, but have not found something to answer my questions. Had some DynoJet stuff for my carb and removed it all and put back in the OEM items.
*** '97 WG = SE heads, SE ignition, Andrews EV-27, TH 2-1, Speed's Performance+ A/C ***
1) Replaced all gaskets / o-rings.
2) Purchased new slide (metal vs. previous plastic) due to tears in diaphram. Drilled the hole in the bottom of the slide.
* #3 I have a question on the spring and slide movement.
3) Re-installed longer OEM spring > can not lift the slide up further than 1/2 way up with finger. Prior spring with the plastic slide I was able to lift it all the way up with my finger.
*** '97 WG = SE heads, SE ignition, Andrews EV-27, TH 2-1, Speed's Performance+ A/C ***
1) Replaced all gaskets / o-rings.
2) Purchased new slide (metal vs. previous plastic) due to tears in diaphram. Drilled the hole in the bottom of the slide.
* #3 I have a question on the spring and slide movement.
3) Re-installed longer OEM spring > can not lift the slide up further than 1/2 way up with finger. Prior spring with the plastic slide I was able to lift it all the way up with my finger.
Does your needle have a clip with grooves?
This picture may help to see if parts are installed correctly.
What size hole drilled in slide?(should leave it stock size)
The nozzle (silver thing) should have the larger hole up.
Longer end up, it's a snug fit, should protude through the carb body, don't booger it up.
You may have a burr or something making it hard to line up and install.
Last edited by Schex; Sep 7, 2012 at 09:05 AM.
