V-Twin CP005 Adjustable Idle Needle for CV40/CV44 Keihin Carbs

The V-Twin CP005 idle needle (Part CP005) provides precise idle fuel mixture control for CV40 and CV44mm Keihin carburetors on Harley‑Davidson FXST models from 1990 to 1999.

Designed for fine-tuning idle, this adjustable needle enables precise calibration of the air–fuel mix to improve idle stability, throttle response, and overall engine feel at low RPM.

Manufactured in Taiwan for durability and reliable operation under demanding conditions, it installs easily to balance air and fuel flow at idle and help prevent stalling or rough idling.

Fitment covers a broad range of Harley‑Davidson models, including FXST, FLST, FLT, FXD, FXR, and XL families, spanning 1990 onward through 2026 as listed in the product specs.

Includes accessory items for a comprehensive maintenance approach: EFI Fuel Line O‑Ring Service Kit, Crankcase Breather Vent Canister Chrome, Intake Manifold Flange Kit Chrome, and Carburetor Tuner Kit Main Jet Assortment.

Idle mixture needle is adjustable for CV carburetor CV40″ and CV 44mm and provides adjustment for Keihin carburetors.

The V-Twin Adjustable Idle Mixture Needle (Part CP005) is designed for precise carburetor tuning on Harley Davidson FXST models from 1990 to 1999. Crafted for CV40 and CV44mm carburetors, this needle allows for fine adjustments to optimize engine performance and fuel efficiency. Constructed with quality materials from Taiwan, it ensures durability and reliable operation under demanding conditions. The needle's adjustability provides motorcycle enthusiasts and mechanics the ability to fine-tune idle characteristics for smoother acceleration and better throttle response. Its compatibility with Keihin carburetors makes it a versatile choice for customizing Harley Davidson motorcycles.

This idle mixture needle is an essential component for maintaining optimal carburetor function. Easy to install, it helps balance air and fuel flow at idle, preventing issues such as stalling or rough idling. Whether you're restoring a vintage FXST or fine-tuning a custom build, this part is crucial for achieving the desired engine behavior. The V-Twin brand’s reputation for quality and precise fitment ensures that this part will meet the high standards required for Harley Davidson motorcycle maintenance.

In addition to the needle itself, consider the accessory items listed, including EFI Fuel Line O-Ring Service Kit, Crankcase Breather Vent Canister Chrome, Intake Manifold Flange Kit Chrome, and Carburetor Tuner Kit Main Jet Assortment, for a comprehensive approach to your carburetor and engine tuning needs. Proper maintenance of these components guarantees smoother operation and longevity of your motorcycle's engine system.

Features:

• Adjustable for CV carburetors CV40 and CV44mm, providing precise fuel mixture control

• Compatible with Harley Davidson FXST models from 1990 to 1999

• Designed for Keihin carburetors, enhancing tuning flexibility

• Durable construction from Taiwan ensures long-lasting performance

• Easy installation for quick and effective carburetor adjustments

• Includes accessory items for comprehensive carburetor maintenance

Fitment:
Harley Davidson FLST 1990
Harley Davidson FLST 1991
Harley Davidson FLST 1992
Harley Davidson FLST 1993
Harley Davidson FLST 1994
Harley Davidson FLST 1995
Harley Davidson FLST 1996
Harley Davidson FLST 1997
Harley Davidson FLST 1998
Harley Davidson FLST 1999
Harley Davidson FLST 2000
Harley Davidson FLST 2001
Harley Davidson FLST 2002
Harley Davidson FLST 2003
Harley Davidson FLST 2004
Harley Davidson FLST 2005
Harley Davidson FLST 2006
Harley Davidson FLST 2007
Harley Davidson FLST 2008
Harley Davidson FLST 2009
Harley Davidson FLST 2010
Harley Davidson FLST 2011
Harley Davidson FLST 2012
Harley Davidson FLST 2013
Harley Davidson FLST 2014
Harley Davidson FLST 2015
Harley Davidson FLST 2016
Harley Davidson FLST 2017
Harley Davidson FLT 1990
Harley Davidson FLT 1991
Harley Davidson FLT 1992
Harley Davidson FLT 1993
Harley Davidson FLT 1994
Harley Davidson FLT 1995
Harley Davidson FLT 1996
Harley Davidson FLT 1997
Harley Davidson FLT 1998
Harley Davidson FLT 1999
Harley Davidson FLT 2000
Harley Davidson FLT 2001
Harley Davidson FLT 2002
Harley Davidson FLT 2003
Harley Davidson FLT 2004
Harley Davidson FLT 2005
Harley Davidson FLT 2006
Harley Davidson FLT 2007
Harley Davidson FLT 2008
Harley Davidson FLT 2009
Harley Davidson FLT 2010
Harley Davidson FLT 2011
Harley Davidson FLT 2012
Harley Davidson FLT 2013
Harley Davidson FLT 2014
Harley Davidson FLT 2015
Harley Davidson FLT 2016
Harley Davidson FLT 2017
Harley Davidson FLT 2018
Harley Davidson FLT 2019
Harley Davidson FLT 2020
Harley Davidson FLT 2021
Harley Davidson FLT 2022
Harley Davidson FLT 2023
Harley Davidson FLT 2024
Harley Davidson FLT 2025
Harley Davidson FLT 2026
Harley Davidson FXD 1999
Harley Davidson FXD 2000
Harley Davidson FXD 2001
Harley Davidson FXD 2002
Harley Davidson FXD 2003
Harley Davidson FXD 2004
Harley Davidson FXD 2005
Harley Davidson FXD 2006
Harley Davidson FXD 2007
Harley Davidson FXD 2008
Harley Davidson FXD 2009
Harley Davidson FXD 2010
Harley Davidson FXD 2011
Harley Davidson FXD 2012
Harley Davidson FXD 2013
Harley Davidson FXD 2014
Harley Davidson FXD 2015
Harley Davidson FXD 2016
Harley Davidson FXD 2017
Harley Davidson FXR 1990
Harley Davidson FXR 1991
Harley Davidson FXR 1992
Harley Davidson FXR 1993
Harley Davidson FXR 1994
Harley Davidson FXST 1990
Harley Davidson FXST 1991
Harley Davidson FXST 1992
Harley Davidson FXST 1993
Harley Davidson FXST 1994
Harley Davidson FXST 1995
Harley Davidson FXST 1996
Harley Davidson FXST 1997
Harley Davidson FXST 1998
Harley Davidson FXST 1999
Harley Davidson FXST 2000
Harley Davidson FXST 2001
Harley Davidson FXST 2002
Harley Davidson FXST 2003
Harley Davidson FXST 2004
Harley Davidson FXST 2005
Harley Davidson FXST 2006
Harley Davidson FXST 2007
Harley Davidson FXST 2008
Harley Davidson FXST 2009
Harley Davidson FXST 2010
Harley Davidson FXST 2011
Harley Davidson FXST 2012
Harley Davidson FXST 2013
Harley Davidson FXST 2014
Harley Davidson FXST 2015
Harley Davidson FXST 2016
Harley Davidson FXST 2017
Harley Davidson XL 1988
Harley Davidson XL 1989
Harley Davidson XL 1990
Harley Davidson XL 1991
Harley Davidson XL 1992
Harley Davidson XL 1993
Harley Davidson XL 1994
Harley Davidson XL 1995
Harley Davidson XL 1996
Harley Davidson XL 1997
Harley Davidson XL 1998
Harley Davidson XL 1999
Harley Davidson XL 2000
Harley Davidson XL 2001
Harley Davidson XL 2002
Harley Davidson XL 2003
Harley Davidson XL 2004
Harley Davidson XL 2005
Harley Davidson XL 2006
Harley Davidson XL 2007
Harley Davidson XL 2008
Harley Davidson XL 2009
Harley Davidson XL 2010
Harley Davidson XL 2011
Harley Davidson XL 2012
Harley Davidson XL 2013
Harley Davidson XL 2014
Harley Davidson XL 2015
Harley Davidson XL 2016
Harley Davidson XL 2017
Harley Davidson XL 2018
Harley Davidson XL 2019
Harley Davidson XL 2020
Harley Davidson XL 2021
Harley Davidson XL 2022
Harley Davidson XL 2023
Harley Davidson XL 2024
Harley Davidson XL 2025
Harley Davidson XL 2026