Check float level . Needle and seat . Adding Comp should not change AFR as described. Try turning fuel tap off should provide above suggestions
SE 44mm big bore HD carb jets
Hi all, I’m based in Cape Town South Africa and having a bit of difficulty finding jets for my carb. Admittedly I do not own a Harley, my SE 44mm is in my Suzuki Samurai 4x4. When first installed I managed to get it running really well with the stock 48 pilot, and a slightly drilled out 220 main, but now that I’ve rebuilt my engine with slightly more compression, it’s running rich and my idle mixture screw is almost seated at preferred idle. So I’m looking to reduce both, probably a 45 or 46 pilot and 200 or 210 main. I can always drill out if main is too small. A EZ idle mixture screw would be a bonus, but would take a standard one as well.
I can’t find anyone in Cape Town who sells these, even the Harley dealership. CV performance in the US does not ship to SA and probably doesn’t have all the items that fit the SE 44mm. Apparently even the needles aren’t available any more for this carb. Any suggestion would be much appreciated. Have a good day.
I can’t find anyone in Cape Town who sells these, even the Harley dealership. CV performance in the US does not ship to SA and probably doesn’t have all the items that fit the SE 44mm. Apparently even the needles aren’t available any more for this carb. Any suggestion would be much appreciated. Have a good day.
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Thanks so much, I’ll definitely look at those items. I presume I can download or view a guideline to follow for correct float level and what angle to look for and measure? I’ll do some research. Thanks again
Harley manual shows . But if you turn off fuel supply to carb and it starts to run good check my suggestions Also check your discharger tube i tight and jets
Harley manual shows . But if you turn off fuel supply to carb and it starts to run good check my suggestions Also check your discharger tube if loose and jets
Thank you, I will definitely try that. Just to note, my 1/4 to 3/4 throttle AFR is close to where I need it. The WOT is a bit richer then we’re I want it, but runs ok. It’s mainly my pilot that has the issue. I’m now less then half a turn out on the idle mixture screw were I used to be 2 full turns out. CheersHarley manual shows . But if you turn off fuel supply to carb and it starts to run good check my suggestions Also check your discharger tube i tight and jets
Will look at that, cheers. Thanks for your time.Blocked pilot jet
If pilot jet was blocked it would need more turns out to richen so disregard comment
Yes I did pick up on that, which is why I originally thought to drop my pilot size from 48 to 46, so I could turn out my idle screw. ThanksIf pilot jet was blocked it would need more turns out to richen so disregard comment
This is an old racing trick, but I think it could work for your application. For the pilot and main jets, find some jets of the same thread pitch, solder the fuel holes shut and drill them to whatever size you need. Drill sets are readily available online that are indexed to the jet sizes in CV carbs. Changing the needle will require a a lathe, but anyone that owns a metal lathe can easily make a pin for a CV carb. Hopefully you can find units that are already made.
Have you considered having CV Performance ship to a freight forwarder? Also look at JetsRUs as a much better alternative to CVP.
Have you considered having CV Performance ship to a freight forwarder? Also look at JetsRUs as a much better alternative to CVP.
Thank you forThis is an old racing trick, but I think it could work for your application. For the pilot and main jets, find some jets of the same thread pitch, solder the fuel holes shut and drill them to whatever size you need. Drill sets are readily available online that are indexed to the jet sizes in CV carbs. Changing the needle will require a a lathe, but anyone that owns a metal lathe can easily make a pin for a CV carb. Hopefully you can find units that are already made.
Have you considered having CV Performance ship to a freight forwarder? Also look at JetsRUs as a much better alternative to CVP.
Thanks so much for the useful info, I never considered welding a set up and then drilling. I believe KTM uses a Keihin jet, looks a bit different to mine, but maybe the thread is the same. I’m gonna check out JetsRUs now. CheersThis is an old racing trick, but I think it could work for your application. For the pilot and main jets, find some jets of the same thread pitch, solder the fuel holes shut and drill them to whatever size you need. Drill sets are readily available online that are indexed to the jet sizes in CV carbs. Changing the needle will require a a lathe, but anyone that owns a metal lathe can easily make a pin for a CV carb. Hopefully you can find units that are already made.
Have you considered having CV Performance ship to a freight forwarder? Also look at JetsRUs as a much better alternative to CVP.
Thank you for
Thanks so much for the useful info, I never considered welding a set up and then drilling. I believe KTM uses a Keihin jet, looks a bit different to mine, but maybe the thread is the same. I’m gonna check out JetsRUs now. Cheers
I looked at the jetsrus page, they have all of the oem sized jets for the CV51 that came in the tuning kit, but not the needles. Well, they might have them, but they are listed with the Keihn part numbers, not the Harley part numbers.
Just to clarify, if you don’t mind. Are the CV51 jets the same as the SE 44mm big bore jets? If they are, even if the needle is not available, I’ll take the pilot and main jet for sure. I just need to organise the forwarding service which I’m looking into now. Thanks again.I looked at the jetsrus page, they have all of the oem sized jets for the CV51 that came in the tuning kit, but not the needles. Well, they might have them, but they are listed with the Keihn part numbers, not the Harley part numbers.
All of the Keihn CV carbs use the same style of jets. The only difference is the size of the fuel orrifice. The actual physical size, shape, fitment is the same. The low and high speeds jets from a CV40 will physically screw into the CV44 and CV51 carbs. They just need to be of the correct size for the application.Just to clarify, if you don’t mind. Are the CV51 jets the same as the SE 44mm big bore jets? If they are, even if the needle is not available, I’ll take the pilot and main jet for sure. I just need to organise the forwarding service which I’m looking into now. Thanks again.
With needle you can fit washers to raise it . Like old carbs that had the 5 groves & clip
Thank you, much appreciated.All of the Keihn CV carbs use the same style of jets. The only difference is the size of the fuel orrifice. The actual physical size, shape, fitment is the same. The low and high speeds jets from a CV40 will physically screw into the CV44 and CV51 carbs. They just need to be of the correct size for the application.
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