NCS NCS238B Mikuni Carburetor Kit Body Choke 40MM

( Brand: Ncs ), ( Manufacturer Part Number: NCS238B ), ( Type: Carburetor )

Review NCS Honda Mikuni 40mm Carburetor Kit Body Choke fits XR650 TM40

Introducing the NCS NCS238B Mikuni TM40 40mm Carburetor Kit for Honda XR650, a high-performance replacement solution for your motorcycle's original carburetor. This kit is specifically designed to fit and function optimally with Honda XR650 models, ensuring a seamless upgrade experience.

The Mikuni TM40 carburetor is renowned for its superior engine response and fuel efficiency. This 40mm carburetor features a flat slide design, which ensures consistent air/fuel mixture delivery for optimal combustion and engine performance. It also includes a choke mechanism, allowing for easy starting in cold conditions.

The NCS NCS238B kit includes all necessary components for a complete installation. These components include the Mikuni TM40 carburetor, a new float bowl gasket, throttle cable, and a choke cable. All hardware required for installation is also included in the kit.

The Mikuni carburetor is known for its durability and ease of tuning. It includes adjustable main and pilot jets, allowing for fine-tuning of the air/fuel mixture for various riding conditions and altitudes. Additionally, the carburetor's design includes a built-in fuel pressure regulator, eliminating the need for a separate fuel pressure regulator.

The NCS NCS238B Mikuni TM40 Carburetor Kit offers several advantages over the OEM carburetor. It provides improved engine performance, with smoother throttle response and increased power output. Additionally, it offers easier tuning capabilities and improved cold starting performance.

In conclusion, the NCS NCS238B Mikuni TM40 40mm Carburetor Kit for Honda XR650 is an excellent upgrade option for riders seeking improved engine performance, ease of tuning, and cold starting capabilities. With its high-quality components and straightforward installation process, this kit is an essential addition to any Honda XR650 enthusiast's toolkit.

The Honda XR650 is a popular enduro motorcycle known for its reliability and off-road capabilities. Upgrading its carburetor system with a Mikuni TM40 40mm carburetor kit, like the NCS NCS238B, can offer several benefits and drawbacks. Here's a detailed analysis:

1. Improved Throttle Response: The Mikuni TM40 carburetor kit offers better throttle response, making the bike more responsive and agile, especially in technical off-road conditions.

2. Fuel Efficiency: Mikuni carburetors are known for their fuel efficiency. The TM40 kit may help improve fuel economy, allowing riders to go further on a single tank of gas.

3. Adjustability: The TM40 kit offers more adjustability than the stock carburetor, allowing riders to fine-tune the bike for various riding conditions and personal preferences.

4. Better Idling: The kit comes with a choke, which can help the bike idle better in cold conditions and provide a smoother start.

1. Complex Installation: Installing the Mikuni TM40 kit can be a complex process, requiring some mechanical skills and knowledge. Some riders may prefer to have a professional mechanic perform the installation.

2. Cost: The Mikuni TM40 kit is more expensive than the stock carburetor, which can be a significant investment for some riders.

3. Potential Issues with OEM Parts: Some riders have reported issues with the OEM parts that come with the kit, such as the choke mechanism and the float bowls. These issues can require additional time and money to address.

The NCS NCS238B Mikuni TM40 40mm carburetor kit for the Honda XR650 comes with several benefits, including improved throttle response, better fuel efficiency, adjustability, and a smoother idle. However, it also comes with some drawbacks, such as a complex installation process, a higher cost, and potential issues with OEM parts.

If you're an experienced mechanic or willing to pay for professional installation, and you value the improved performance and adjustability that the Mikuni TM40 kit offers, then it may be a worthwhile investment for your Honda XR650. However, if you're not confident in your mechanical abilities or prefer a more straightforward and cost-effective solution, you may want to consider other options or wait until you have more experience before attempting this upgrade.

part # ncs238b prices

• $404.50-$424.50

specifications iodacarb:

• for models: Xr650, Tm40
• for makes: Honda
• brand: Ncs
• manufacturer part number: NCS238B
• type: Carburetor

payments iodacarb:

• credit card: Discover
• other
• wallet: Apple-pay

offer iodacarb:

• quantity: 1
• options: Ship-to-home
• started: April 9, 2025
• sold: 0
• availability: In Stock

returns iodacarb:

• policy: No Returns

seller iodacarb:

• rating: 88.1%
• # reviews: 2771

shipping iodacarb:

• transit: 8-14 Days
• class: Standard
• service: USPS Ground Advantage
• cost: $0.00
• type: Fixed
• carrier: USPS

general iodacarb:

• condition: Used
• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Carburetors

Ncs NCS238B Is Similar To:

• Ncs 6598 Yamaha Xs650 34mm Vm34 Mikuni Round Slide Carburetor Conversion Carb Kit (49.7% similar) $474.50–$504.50. (August 26th, 2025)
• Ncs 16014-286-000 Honda Cb350 Sl350 Cl350 Carburetor Top Chrome (56.5% similar) Please see pics as part of looks straight, slightly pitted, but over all in good condition. (January 1st, 2026)