Czsmbt CV40 Carburetor Replacement for Harley-Davidson 40mm — 1988–2017 Fit, Includes Jets & Installation Kit

The Czsmbt CV40 is a 40mm OEM-style replacement carburetor engineered to fit many Harley-Davidson Sportster, Softail, Dyna/FXR and Touring models from 1988–2017.

If your Harley is running rough, hesitating under throttle, or you need a direct-fit replacement for a worn or damaged carburetor, the CV40 offers an affordable, bolt-in solution supplied with jets, spark plugs and installation accessories. This unit mirrors common Harley CV40 configurations and ships with three main jets and three slow jets so you can tune air/fuel mixture for your machine without hunting down parts.

Which Harley models and years will this carburetor fit?

The Czsmbt CV40 covers a wide range of Harley models with OHV Twin engines that originally used 40mm CV-style carburetors. Confirm fit by model and year before ordering to ensure a correct match.

• Sportster 883 / 1200 models (commonly 1998–2016/2017 depending on variant)
• Softail family models (late ’80s through mid-2010s)
• Dyna and FXR series, plus Touring bikes listed 1988–2016
• Replaces common part numbers including 27421-99C, 27490-04 and similar OEM references

What hardware and tuning parts are included with the carburetor?

This purchase includes a comprehensive accessory pack so you can install and start tuning right away without sourcing extras. The assortment helps adapt the carburetor to slightly different intake or fuel setups.

• 1 x assembled CV40 carburetor ready for mounting
• Fuel plumbing: 2 fuel lines and 1 inline fuel filter
• Tuning kit: 3 main jets (#180, #185, #190) and 3 slow jets (#42, #45, #48)
• Extras: 1 brush set for cleaning and 2 replacement spark plugs

How does this carburetor handle tuning and baseline jetting?

The carburetor arrives with a stock-style baseline jetting so you have a starting point close to many factory settings. Final jetting should be verified on your bike because intake, exhaust and altitude affect mixture needs.

• Factory-stock main jet reference in many applications is #170; this kit provides larger main jets for richer tuning
• Slow/idle jets include #45 as a middle setting with #42 and #48 for leaner or richer adjustments
• Adjustable for altitude and performance mods using supplied jets and standard tuning procedures

What after-sales coverage and support comes with the Czsmbt CV40?

Each carburetor is backed by a one-year service policy for peace of mind. If parts are missing or the unit fails to meet expectations, contact the seller for a refund or replacement per the warranty terms.

• One-year support for defects or fitment issues
• Customer option for refund or replacement if not satisfied
• Basic installation accessories included to simplify fitting and initial adjustments

Who is this for: Riders and DIY mechanics who need a cost-effective, direct-replacement 40mm CV carburetor for classic Harley-Davidson models—especially owners restoring older bikes or replacing worn stock carbs. This kit is best for people comfortable with basic mechanical installation and carburetor jetting, and for shops that want a ready-made parts kit to service Sportster, Softail, Dyna/FXR or Touring motorcycles.