Note: If your engine does not start or idle properly now, you should attempt determine the cause and repair it prior to making these carburetor modifications. Do not under-estimate the ability of the stock Keihin CV carburetor to produce good horsepower. The stock CV carburetor has a venturi diameter of 40mm 1.

A stock bike cc 80 CID can develop up to 64 horse power with a well tuned and modified CV carburetor. Click here to see dyno testing on the CV against other carburetors. With a few parts from your local Harley-Davidson Dealer and some tools, you can re-jet a CV carburetor and improve the performance of your bike.

Slide Spring 2. Slide Diaphragm 3. Vacuum Slide 4. Vacuum Port 5. Needle Jet 6. Main Air Jet 7. Main Jet 8. Slow Jet 9. Idle Mixture Adjustment Screw Throttle Plate Step 1. You might get away with leaving the throttle cables connected. It is much easier to remove the carburetor and use a work bench. It is faster to cut the fuel line hose off rather than trying to save it.

If you take out the rear fuel tank bolts and loosen the front bolts, the fuel tank can be raised a few inches. The extra room gained by raising the tank is the difference between struggling with the job and making it easy. The aluminum plug covering the idle mixture adjusting screw needs to be removed.

Turn the carburetor over and locate the plug toward the rear of the carburetor, in back of the float bowl. If the plug does not fall out while drilling, remove the drill bit. This will allow enough grip to remove the plug by pulling on the self-tapping screw with a pair of pliers. Underneath you will find a slotted screw. Over tightening this screw can damage the carburetor and needle. This provides a starting point for tuning.

There is a spring under the top cover, so hold it with a finger until all screws are loose. Holding the carburetor upright, remove the cover and spring. Inside the slide you will see the plastic spring seat.

Under the spring seat is the jet needle.Learn more about Dennis Kirk. We're always looking to improve your shopping experience. If you have experienced a problem with our website, please describe the issue in as much detail as possible so our team can explore it further. Search Within. View Cart Checkout. My Garage. Saved Rides Manage Rides. Add a new ride. Harley Categories. Find Parts Fast. Select Year. Select Make.

cv carb parts

Select Model. Harley Parts back. Harley Accessories back. Tire Finder. Aspect Ratio. Rim Diameter. Tire Sizes Explained. Tire Width. Harley Tires back.Skip to main content Harley Carburetor. Only 7 left in stock - order soon.

CV Performance Tuners Kit part 1

Add to cart. In Stock. Other carburetors have horrible reviews. I had an original Harley CV 40 that I rebuild 40 times and never ran well. This thing looked sick out of the box. The installation went well except for the bracket that holds the accelerator cables.

It was the same, so I used the old one. Once everything was put together, pumped the gas a few times and fired right up! I had to adjust the needle and the butterfly a few times till I got it just right. I cannot be happier with this. I my got me back to riding. Not a good buy junk leaks gas new out of the box not happy. Great carburetor for cc engines. Perfect fit for my 06 sportster. Of course the bolts are special and didn't match threads.

But used bolts and carefully re-threaded the carb. Was also didn't under stand why there was no place to attach over flow hose. But, bike runs better than ever, for the price very pleased. I already had the adapters because the clearance problem the hypercharger has and you may not need them. Only 20 left in stock - order soon. Should have done this ages ago. No more lugging, no more starving for fuel, no more hard starting, an no more frustration with the shortcomings of factory EFI on modded engines.

Cons: People will tell you that you're making a mistake. Your friends will hate you when they realize how wrong they are.Recommended Retail Prices excluding sales tax. Prices exclude shipping, import duties and installation. Item number.

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James, pack 4. Your remark. Clamp 2pack. Seal, Map Sensor. James, pack. Manifold seal, TC, James, 2-pack. U-ring for stock manifold, James. Manifold, Sportster. Manifold, V-Twin Mfg. Manifold flange front, Genuine Zodiac, each. Manifold flange rear, Genuine Zodiac, each. Carburetor top, chrome. Carburetor top with choke cable bracket, chrome, Yost USA. Needle Jet.

cv carb parts

Needle Jet Holder. O-ring, Spring, pack. E-clip, pack. Screw, Top 3 Idle screw. Idle screw spring, Big Twin, Sportster, pack.This idle mixture needles for CV and butterfly Keihin carburetors allow easy adjustment of the idle mixture. It is a direct replacement of the OEM needle. The knurled adjustment knob makes setting the idle mixture a snap. For more information visit the Johns Motorcycle Parts site. Bike Tech has found this to be a handy little part to put on a CV carburetor.

Installation of this idle mixture needle is simple. Just remove the old needle, making sure the spring and O-ring are removed along with the it. Making idle mixture adjustments can now be easily made while the engine running and without needing a screwdriver. H-D has used Keihin butterfly and CV type carburetors since The same injection molded fuel inlet elbow is installed on both types.

The OEM elbow breaks easily, can be affected by today's fuels and has a restrictive flow rate.

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The increased flow easily keeps up with the demand of a modified engine. The elbow is designed to be a direct replacement for the OEM item. In case someone uses a screwdriver that is a bit to wide and messes up the threads for the screw, a 6mm x.

Make sure to ground the end of the tap flat so it does not damage the screw seat. Where is Sifton Cams? If you misplace the idle mixture screw in your Keihin CV carburetor, there are actually two different sources for replacement parts.

Don't let the Harley heat monster ruin your riding. Harley Camshaft Specification Tables. The basics of Fuel Injection explained. Pro Tuning on a Shade Tree Budget. Jet Needle Part Number. Rich V V V Lean. Provided by Dave Morse. Your neighborhood Kawasaki dealer has parts for the CV carburetor. The Nightrider Diaries The ramblings of a genius a, a madman and something in between.The item selected will only fit the motorcycles listed.

cv carb parts

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Harley Carburetor

Drag Specialties Harley-Davidson Keihin Unbranded V-Twin Manufacturing Type see all Type. Carburetor Carburetor Rebuild Kit Throttle Slide 4. Float 2.

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