Description
Overview:
This Kickstarter Pinion is a genuine JAP component for vintage petrol industrial engines, supplied under OEM No. 21768. It is a machined steel gear with 11 teeth that engages the kickstart mechanism to rotate the crankshaft and start the engine. Designed for JAP 4/3 and JAP 5 engines and commonly used across the JAP 6 family, it replicates the original fit and function for reliable starting performance. The threaded hub measures 35 mm (1 3/8 inches) in diameter, matching the original specification found on these engines. As unused old stock, the part preserves period-correct geometry and build quality, though light tarnishing or storage marks may be present. Ideal for maintenance and restoration of historic plant and machinery powered by JAP engines.
Key Features:
- Genuine JAP part (OEM 21768) for assured compatibility and correct fit
- 11-tooth pinion provides positive engagement with the kickstart mechanism
- Machined steel construction for strength and dependable service life
- Thread diameter: 35 mm (1 3/8 inches) for the specified JAP assemblies
- Direct replacement matching original tooth form and hub dimensions
- Suitable for JAP 4/3, JAP 5, and JAP 6 engine kickstart drives
- Unused old stock (NOS) with possible cosmetic age marks only
- Helps restore reliable hand-starting on period engines without modification
- Maintains historical accuracy for restorations and heritage machinery
- Sensible to confirm tooth count and thread before installation
Typical Applications:
Used on vintage JAP petrol engines fitted to stationary plant and site machinery, including generators, pumps, compressors, compactors, small industrial equipment, and restoration projects. Suitable where a kickstart drive is required to crank the engine by hand while keeping parts authentic to the original build.
Also known as:
Kickstart gear, kick-start pinion, starter gear, starter pinion gear, 11T starter pinion, kickstart drive pinion, quadrant drive pinion, kickstarter drive gear, start pinion, kick mechanism gear.
Fits Models:
JAP 3/4, JAP 4, JAP 5, JAP 6, JAP34, JAP4, JAP5, JAP6
Product Specifications
| L&S Part No. | 21768 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JAP |
| OEM No. | 21768 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | JAP |
| Key Features | - Genuine JAP part (OEM 21768) ensures correct fit - 11-tooth pinion engages kickstart mechanism - Machined steel for strength and durability - Thread diameter: 35 mm (1 3/8 inches) - Suitable for JAP 4/3, JAP 5, and JAP 6 engines |
| Fits Models | JAP 4, 3 | JAP 5 | JAP 6 |
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