- #420 Sprocket & Chains | STD Size

YUMINASHI #420 STANDARD SPEC SPROCKET & CHAIN DRIVE SYSTEM
Fits Honda MSX125 / Grom 125 (2013 – 2017)

Keep your drivetrain running smoothly with the Yuminashi #420 Standard Spec Drive System. As the original factory-specified size for the Honda MSX125 / Grom, the #420 pitch offers the perfect compromise between low rotational weight, low friction, and long-term street durability for daily riding and street-tuned engines.

• OEM Sizing & Fitment: Direct replacement for stock drive dimensions, ensuring hassle-free installation on original wheel setups.

• Balanced Efficiency: Lighter than heavy #428 conversions to keep drivetrain loss minimal, while providing longer service life than hyper-light #415 track-only setups.

• Precision Engineering: High-tensile steel construction ensures consistent wear patterns and minimal chain stretch under load.

Note: #420 chains must be paired with #420 front and rear sprockets. Do not combine with #415 or #428 pitch drive components.