Author Topic: Ebay CV carburators  (Read 965 times)

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Offline Dyna Jay

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Ebay CV carburators
« on: August 25, 2020, 06:14:10 PM »
Has anyone tried one of these new CV carburators off ebay? They look well made. I'm curious to the quality of them.
https://www.ebay.com/itm/183260685375
« Last Edit: August 25, 2020, 09:18:15 PM by Dyna Jay »
Ride on.

Offline Hillside Motorcycle

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Re: Ebay CV carburators
« Reply #1 on: August 26, 2020, 04:18:54 AM »
Those are NOT like a genuine CV.
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Offline JW113

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Re: Ebay CV carburators
« Reply #2 on: August 26, 2020, 12:08:08 PM »
I bought one on a whim, it's on my '78 Sportster.

Hillside, what do you mean "not like a genuine CV"? No, they are not made by Keihin. That said, from what I can see, they are essentially identical to a Keihin CV. I've not yet found any parts from a Keihin CV that won't interchange on one of these Chinese (???) made carbs. Keihin no longer makes these carbs. Did Keihin sell the tooling to somebody, who is now making repops, the way GM sold a lot of their tooling to Classic Industries?

The one I have on my XL runs perfectly. I used a Daytona Sensors WEGO II to dial it in dead nuts on. Could not be happier.

But, that is just one guy's experience with these knock-offs. I'm sure others might not have had the same outcome.

I am a big fan of the CV carb, I have one on every one of my HDs. The newest used CV is now 15 years old, if you can find one that new. The oldest ones are almost 30 years old. Carbs indeed do wear out in time. So the question posed to the fans of the CV carb, what are your options at this point?

-JW
2004 FLHRS   1977 FLH Shovelhead  1992 FLSTC
1945 Indian Chief   1978 XL Bobber

Offline JohnnyCashPan

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Re: Ebay CV carburators
« Reply #3 on: August 27, 2020, 02:08:21 AM »
...Carbs indeed do wear out in time. So the question posed to the fans of the CV carb, what are your options at this point?

-JW

You're absolutely right about carbs wearing out.
I've got two decent CV carbs by way of installing S&S "E"s for local riders.  They told me to keep them and I did.
If I didn't have them, it would be a Mikuni or S&S E.  I consider the Mikunis to be a hassle to set up but my neighbor did his on his Road King, and I'm impressed with the results he got.
Old, slow and fat...

Offline CraigArizona85248

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Re: Ebay CV carburators
« Reply #4 on: September 20, 2020, 06:54:55 PM »
I just ordered this one for about 1/2 the price. https://www.ebay.com/itm/CV-40mm-Carburetor-For-Harley-Davidson-Sportster-883-1200-Electra-Glide-27490-04/352769998214

I'll post about the quality after I get it and tear it down to look at it.

-Craig

Offline CraigArizona85248

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Re: Ebay CV carburators
« Reply #5 on: September 24, 2020, 01:54:13 PM »
Ok, I spent less than $60 for the carb I linked to above.  It arrived today.  I haven't had a chance to tear it down yet, but from a casual inspection, if this had the bar & shield logo in the side of the carb body, I would think it was an OEM carburetor.  The only difference I can see externally, is that the throttle linkage hardware is silver instead of having the gold tint that the OEM linkage has.  It has the brass fuel inlet tube instead of the plastic tube that the OEM carb had (the brass inlet was a common upgrade after the plastic broke).  The carb comes with one slow jet installed (unknown size at this time) and three extra slow jets (180, 185, and 195).  It comes with one main jet installed (unknown size at this time) and three extra main jets (42, 45, and 48).  It also came with some useless pieces... a really cheap fuel filter (toss it), 2 cheap fuel lines (toss them), and a random spark plug... just one.   :hyst:

I'll update again after I get a look at the internals.  But for less than $60, so far, I'm impressed!

-Craig

« Last Edit: September 25, 2020, 01:00:51 PM by CraigArizona85248 »

Offline CraigArizona85248

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Re: Ebay CV carburators
« Reply #6 on: September 24, 2020, 01:56:46 PM »
The jets I mentions in the previous post...


Offline Deye76

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Re: Ebay CV carburators
« Reply #7 on: September 24, 2020, 03:54:44 PM »
I was hoping to see pics of the fuel lines and filter. :hyst:
Thanks for the report.  :up:
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Offline CraigArizona85248

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Re: Ebay CV carburators
« Reply #8 on: September 24, 2020, 04:37:42 PM »
Ok, I tore it down and looked at the insides. Everything looks pretty much like OEM with a few exceptions.

1) The slide spring is very different from OEM. Shorter and a different number of windings. I don't have a way to measure the spring rate, but if it varies from OEM by much, that's going to have a big impact on the carbs performance.

2) The Jets look a little sloppy. They just aren't as nicely made as OEM.

3) The emulsifier tube is very different from OEM. The OEM part has a series of holes drilled down the length of the tube. This one is smooth, no holes.

4) There are no markings on the slide needle to identify it's profile. I've always preferred the N75E needle that came on the 80's/early-90's Sportster.

I'm going to try the carb out on my panhead. But I'm going to swap the slide spring, slide needle, and use my OEM Jets and emulsifier tube.

Online Hossamania

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Re: Ebay CV carburators
« Reply #9 on: September 24, 2020, 08:59:24 PM »
Watching this to see how it turns out for you.
When borrowing money from a friend, decide which you need most.

Offline JW113

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Re: Ebay CV carburators
« Reply #10 on: September 25, 2020, 09:35:44 AM »
The description of spring, jets, emulsion tube sound a lot like what was sold with the "Dynojet Kit". Which was advertised in theory to "improve performance and throttle response", but in practice cut fuel mileage in half. You're right to changing those parts to OEM.

Oh, one thing I did find different with the one I bought vs. OEM: The hardware is metric. Might want to check that with yours and beware.

-JW
2004 FLHRS   1977 FLH Shovelhead  1992 FLSTC
1945 Indian Chief   1978 XL Bobber

Offline Buglet

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Re: Ebay CV carburators
« Reply #11 on: September 25, 2020, 02:06:11 PM »
   I install enough Dyno Jets kits over the years and once done right you mileage would stay the same or I've seen it even increase. The big reason for the decrease is people are always in it to hear the exhaust. Normal driving will give you normal gas mileage.

Offline cheech

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Re: Ebay CV carburators
« Reply #12 on: September 25, 2020, 02:52:16 PM »
I was hoping to see pics of the fuel lines and filter. :hyst:
Thanks for the report.  :up:

Me also.

You voided the warranty by taking it apart.  :bike:

Online Hossamania

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Re: Ebay CV carburators
« Reply #13 on: September 25, 2020, 06:39:44 PM »
I was hoping to see pics of the fuel lines and filter. :hyst:
Thanks for the report.  :up:

Pics of those are in the link Craig posted. I wouldn't have used them either!
When borrowing money from a friend, decide which you need most.

Online Hossamania

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Re: Ebay CV carburators
« Reply #14 on: September 25, 2020, 06:46:17 PM »
Delete, don't want to hijack
« Last Edit: September 25, 2020, 06:50:54 PM by Hossamania »
When borrowing money from a friend, decide which you need most.

Offline Scotty

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Re: Ebay CV carburators
« Reply #15 on: September 26, 2020, 01:34:38 AM »
I hope it's better than the one I tried around couple of years ago the stock jets and emulsifier would not screw in because they were a different thread.
There were other problems as well and it went in the junk pile and finally made it's way to the bin where it belonged  :hyst:

Offline JW113

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Re: Ebay CV carburators
« Reply #16 on: September 26, 2020, 09:20:30 AM »
Well that's a shame. The one I bought is and has been working great. I wish this company making them would offer a CV-51 for $100!

-JW
2004 FLHRS   1977 FLH Shovelhead  1992 FLSTC
1945 Indian Chief   1978 XL Bobber

Online Hossamania

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Re: Ebay CV carburators
« Reply #17 on: September 26, 2020, 04:53:14 PM »
Well that's a shame. The one I bought is and has been working great. I wish this company making them would offer a CV-51 for $100!

-JW

And a 44!
When borrowing money from a friend, decide which you need most.

Offline jeffscycle

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Re: Ebay CV carburators
« Reply #18 on: September 29, 2020, 04:10:33 PM »
Well that's a shame. The one I bought is and has been working great. I wish this company making them would offer a CV-51 for $100!

-JW

And a 44!

 Bore a stock /Chinese one to 44mm & use a butterfly out of an old early Kehin. you'll break into some dead cavities around the slide rails, which you can epoxy in & clean up. Not sure if Chinese ones have the same passage work, but for the price it may fly.
'01 FXDXT, '99 FXDL/XRD, '76 FLH