Part Names and Functions of the NIBBI PWK38 Carburetor (SR400/500)
What the manual for the NIBBI PWK38 Carburetor Kit (SR400/500) covers. A numbered guide to the name and role of each part, including the choke lever, idle screw, and air screw.
- Location of each carburetor part (1-6)
- Roles of the choke lever, idle screw, and air screw
- Hose connection points and the jet needle's adjustment range
The NIBBI PWK38 Carburetor Kit is a carburetor kit for the SR400/500.
This page introduces the names and functions of each part (1-6) of the carburetor shown in the manual. Use it as a reference when connecting hoses or making adjustments.
01 Part names and functions
| No. | Name/Function |
|---|---|
| 1 | Increases fuel flow to assist starting. (Choke lever) |
| 2 | Drains fuel when the carburetor tilts. *Connect the included hose |
| 3 | Fuel inlet *Connect the hose from the fuel tank |
| 4 | (Idle screw) Adjusts the idle. |
| 5 | (Air screw) Fine-tunes the air. |
| 6 | Drains fuel in the event of an overflow. |
The jet needle lets you adjust the range of roughly 2/4 to 3/4 throttle opening.
Explanations of tools and general work are omitted. Minor adjustments or workarounds may be needed due to individual differences between bikes. After installation, check that all fasteners are tight. If you are unsure about the installation, be sure to have it done by someone experienced or by a custom shop. For any questions, please reach us through our contact form.
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*Installation is at your own risk. If you're unsure about doing the work yourself, we recommend consulting your local motorcycle shop.
*The content and photos reflect the time of writing. Please check each product page for current specifications, fitment and stock.