Sunstar Steel Front Countershaft Drive Sprocket (16-Tooth / 630 Pitch) — Part #60616
$5.00
Sale price
$5.00
Regular price
$25.99
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Sunstar Steel Front Countershaft Drive Sprocket (16-Tooth / 630 Pitch) — Part #60616
$5.00
Sale price
$5.00
Regular price
$25.99
Product Overview
The Sunstar Steel Front Countershaft Drive Sprocket (Part #60616) is a premium, high-strength replacement engine gear manufactured by Sunstar, a leading supplier of original equipment (OEM) sprockets worldwide. This heavy-duty 16-tooth front sprocket anchors your motorcycle's primary drive system, transferring mechanical engine power directly from the transmission countershaft to the rear wheel configuration via an industry-standard 630-pitch drive chain. Crafted as an exact OEM substitute, it restores original factory gear ratios, providing highly efficient power delivery and absolute drivetrain reliability for classic motorcycles. [1, 2]
Technical Specifications
- Manufacturer: Sunstar
- Part Number: 60616 (Industry cross-ref profile: JTF522.16)
- Product Type: Drive Train / Front Countershaft Engine Sprocket
- Material: Premium-grade, case-hardened chromium molybdenum steel for maximum structural toughness.
- Finish: Specialized "Parkerizing" chemical surface finish for superior rust and corrosion resistance.
- Size Profile: 16-Tooth (16T) tooth geometry mapped precisely for a 630 final drive chain pitch.
- Fitment Type: Direct OEM precision-fit bolt-on upgrade slider matching original vintage countershaft splines. [1, 2, 3, 4, 5]
Key Features & Benefits
- Case-Hardened Steel Matrix: Built using specialized heat treatment processing that raises external surface hardness to resist tooth rounding, wear, and pocket deformation under sudden acceleration. [1, 2]
- Parkerized Outer Coating: Coated with an advanced anti-corrosive layer that won't degrade over time, safeguarding the sprocket against harsh weather and road contaminants. [1, 2]
- Micro-Tolerance Splines: Engineered to meet strict factory dimensional clearance limits, eliminating shaft micro-wobble to keep power distribution completely linear and defend your transmission output shaft seals from stress-induced leaks.
- OEM-Grade Longevity: Manufactured to match or exceed the durability metrics set by Japanese motorcycle factories, offering an estimated lifespan of 10,000 to 30,000 km. [1]
Confirmed Motorcycle Fitment
This specific vintage spline architecture and 630 chain pitch offset is a confirmed, direct fit for the following classic Japanese street platforms across 1977 to 1985 model years: [1]
| Manufacturer | Model | Compatible Model Years | Chain Pitch / Teeth |
|---|---|---|---|
| Kawasaki | Z 1000 LTD | 1980, 1981, 1982 | 630 Pitch / 16-Tooth |
| Kawasaki | KZ1000 (Various sub-models) | 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 | 630 Pitch / 16-Tooth |
| Kawasaki | ZN1100 | 1983, 1984, 1985 | 630 Pitch / 16-Tooth |
| Honda | CB750 (Select Vintage Models) | 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 | 630 Pitch / 16-Tooth |
| Honda | CB900 | 1979, 1980, 1981, 1982, 1983, 1984, 1985 | 630 Pitch / 16-Tooth
|
| Honda | CB1000 | 1983, 1984, 1985 | 630 Pitch / 16-Tooth |