TST WORX 420 Lightweight Aluminum Rear Sprocket Honda Grom / Monkey / Super Cub

Our TST WORX 420 Lightweight Aluminum Rear Sprocket was developed to provide dramatic component weight loss and exceptional durability by combining high-quality 6061 aluminum alloy with advanced manufacturing and hardening anodized finishing techniques. So whether you're tearing up the streets or chasing the podium at the track, our TST WORX Rear Sprocket was designed to provide increased and long-lasting performance on your Honda 125cc beast! Available in 34, 35, 36, 38, 39, 40 tooth counts.

Applications: See specs / weight below

Honda Grom / MSX 125 | 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
Honda Monkey | 2019, 2020, 2021 (4-speed)
Honda Super Cub 125 | 2019, 2020, 2021 (4-speed)

Features:

• CNC machined from lightweight 6061 aluminum alloy using advanced techniques
• Full sprocket treatment with Type III black anodized hard-coat for long-lasting durability
• Proprietary matte black anodized finish
• Proprietary tooth profile
• Ultra-smooth tooth transition geometry
• Roughly 65% lighter than the stock
• Honda Grom rear sprocket
• Available in a wide range of tooth count profiles

When it comes to increasing the power delivery of the mighty Honda 125cc engine, the rear sprocket is a great place to start. Not only can you go up or down in tooth count to focus more power where you want it in the range, but by upgrading to a lightweight aluminum sprocket you're able to decrease parasitic power loss in the drive train. With a roughly 65% decrease in the weight of the sprocket, that means it takes less power to turn and therefore transfers more of that power to the rear wheel. That may not seem like a huge deal on a standard bike, but when it comes to the Honda Grom, Monkey, or Super Cub 125, every bit of power that you can get to the wheel counts and makes a difference. The blend of high-quality material, advanced hardening procedures, lightweight design, proprietary tooth profile, and ultra-smooth tooth transitions ensure exceptional performance even during the most demanding riding situations.

We produce every TST WORX Rear Sprocket from 6061 aluminum alloy. This high-quality material is CNC machined using a propriety holding plate process developed to eliminate vibration during the machining process and ensure extreme precision and material integrity. We then treat the entire rear sprocket with a matte black Type III hard coat anodizing process that penetrates the aluminum and builds an ultra-hard surface layer, resulting in a lightweight sprocket with exceptional durability characteristics capable of taking on the rigorous demands of the street and track.

Spec Sheet:

Rear Sprocket Weight Guide