Product Description
Brand new official KMC heavy-duty gold roller chain. Manufactured from high-tensile alloy steel with precision-stamped heat-treated plates, seamless rollers, and a striking corrosion-resistant gold finish on both outer and inner links. Engineered to handle high mechanical stress while adding an authentic retro custom aesthetic to vintage small-wheel Honda and Yamaha minibike restorations.
Vehicle Compatibility
Engineered explicitly for classic Japanese mini-bikes, step-throughs, and mopeds utilizing 420-pitch drive sprockets and a 90-link length configuration.
Verified catalog fitment layout:
| Make |
Model Family |
Engine Type / Displacement |
Model Years |
| Honda |
Z50 / Z50A / Z50J / Monkey / Gorilla |
50cc (4-Stroke Horizontal Single) |
1968–1999+ |
| Honda |
ST50 / ST70 / Dax |
50cc / 70cc (4-Stroke Horizontal Single) |
1969–2003 |
| Honda |
CF50 / CF70 / Chaly |
50cc / 70cc (4-Stroke Horizontal Single) |
1972–2000s |
| Honda |
C90 / Super Cub 90 (Select Custom / Short-Wheelbase Setups) |
90cc (4-Stroke Horizontal Single) |
1960s–2000s |
| Yamaha |
LB50 / LB80 / Chappy |
50cc / 80cc (2-Stroke Automatic / Manual) |
1973–1990s |
Fitment & Technical Details
Remove the front sprocket cover and rear chain guard. Break or remove the old worn chain using a chain breaker tool. Wrap the new 90-link KMC 420 gold chain over the front engine sprocket and rear wheel sprocket, sizing it precisely to 90 links if any trimming is required for modified swingarms. Secure the ends using the included master connecting clip, ensuring the closed end of the spring clip faces the direction of chain rotation, and adjust rear wheel axle alignment for proper chain slack (15–25mm of vertical play).
Important: Please ensure the part number matches your motorbike before purchasing. If you have any questions about the part or its compatibility, feel free to contact us. We’re here to help!
At Dmmotorcycles, we’ve specialized in vintage and vintage sports motorcycles and parts directly from Japan since 1998. We stock a wide selection of rare genuine and high-quality aftermarket parts and continually update our inventory to meet growing demand.
Looking for a specific part? Don’t hesitate to ask! We may have it in stock even if it’s not listed online. If not, we’ll do our best to source it for you.
We’re also happy to provide guidance on installation and offer excellent after-sales support to ensure your satisfaction.
Shipping Information
We ship worldwide, carefully inspecting and securely packing all parts to ensure safe delivery. Your order will be insured and shipped quickly, with the best available shipping option chosen for speed and reliability.
Please note:
- All parts are shipped from Cyprus (Europe).
- Customers outside the EU may incur additional import taxes based on the value of the item.
