Aftermarket carburettor for Harley-Davidson motorcycles, designed as a direct replacement and to simplify tuning. Riders who want smoother idle and crisper acceleration receive a complete kit and multiple jets, the Czsmbt Carburettor CV40. Will it fit your model years and make the bike more enjoyable to ride?
⚡ At a Glance
- • Fuel Delivery: Balanced airflow, responsive mid-range, stable idle
- • Best for: Owners of older Harley models wanting a straightforward replacement
- • Not ideal for: Machines requiring electronic fuel injection conversions
A 40mm CV-style replacement carburettor compatible with many Harley-Davidson Sportster, Softail, Dyna, FXR and Touring models. Supplied with multiple jets and installation parts to aid initial fitting and tuning.
Smoother idle and crisper throttle response, thanks to the 40mm CV bore
The 40mm bore size determines airflow capacity and, paired with the CV design noted in the name, supports consistent fuel delivery across throttle positions. Included main and slow jets allow adjustment of the fuel mixture for different conditions.
Easier to achieve a steady idle and more immediate mid-range acceleration after fitting and tuning. Riders can change jets from the supplied set to match altitude and riding style.
Direct OEM-style fit, with matching threads and fasteners
Listed part numbers match common Harley replacement references, and user feedback indicates threads and fasteners align with original mounting. Fitment covers Sportster, Softail, Dyna, FXR and Touring model years given in the description.
Straightforward bolt-on replacement for compatible Harley models, reducing the need for manifold modification or custom adapters. Maintains original mounting points and alignment for simpler installation.
Ready-to-tune kit supplied, with spare jets and installation items
Package contents include two fuel lines, a fuel filter, two spark plugs, three main jets (180, 185, 190) and three slow jets (42, 45, 48) in addition to the stock jets noted. A one year warranty is also provided.
Most of the common tuning hardware arrives in the box, so riders can test richer or leaner jets without sourcing parts separately. The extra components speed up the road-to-ready process after fitting.
✨ The 4 Key Reasons for Czsmbt Carburettor CV40
- OEM-compatible fit - Matches original threads and fasteners for straightforward swap
- Jet assortment included - Allows tuning across riding conditions with three main jets
- Full install kit supplied - Fuel lines, filter and spare plugs reduce prep time
- Wide model coverage - Compatible with Sportster, Softail, Dyna, FXR and Touring years
📋 Technical Details at a Glance
- Brand: Czsmbt
- Model: CV40
- Type: 40mm CV replacement carburettor
- Fitment: Sportster 1998-Up, Softail 1988-2017, Dyna/FXR/FXD 1988-2016, Touring 1988-2016
- Part numbers referenced: 27421-99C, 27421-99A, 27490-04, 27465-04, 27031-95, 27490-96, 27492-96
❓ Frequently Asked Questions
Q: Will this carburettor fit my Harley Sportster or Softail?
A: Fitment covers Sportster models from 1998 upwards and Softail models from 1988 to 2017, along with Dyna, FXR/FXD and Touring years listed in the description, so check those year ranges against your bike.
Q: Which jets and spares are included for tuning?
A: The package includes three main jets (180, 185, 190), three slow jets (42, 45, 48), plus the stock main and slow jet sizes noted, enabling initial mixture adjustments.
Q: Is there any warranty or aftercare?
A: A one year warranty is provided, and the seller offers refund or replacement options if not completely satisfied according to the package details.
🏆 Our Verdict
The Czsmbt Carburettor CV40 suits owners of older Harley-Davidson Sportster, Softail, Dyna, FXR and Touring bikes who want a like-for-like replacement that is easier to tune. Included jets, fuel lines and plugs make initial setup and mixture tuning straightforward, while matching OEM part numbers and threads help ensure a clean fit. Offers strong long-term value thanks to the comprehensive kit and wide compatibility.
