- #428 Sprocket & Chains | Heavy Duty

YUMINASHI #428 HEAVY-DUTY WORKHORSE SPROCKET & CHAIN CONVERSION
Fits Honda MSX125 / Grom 125 (2013 – 2017)

Upgrade to maximum drivetrain durability with the Yuminashi #428 Heavy-Duty Drive System. Designed specifically for high-torque big bore kits, heavy daily commuting, and high-load riding, the #428 pitch conversion replaces thin stock components with heavy-duty drive hardware built to eliminate stretch and premature tooth wear under load.

• Maximum Tensile Strength: Thicker pins, wider rollers, and beefier side plates handle intense torque spikes from modified big bore engines without stretching or snapping.

• Extended Service Life: Drastically reduces chain maintenance intervals and sprocket tooth wear compared to standard stock sizes.

• Ultimate Workhorse Reliability: The premier choice for riders who demand bulletproof longevity, zero drivetrain flex, and maximum load capacity over hyper-lightweight speed tricks.

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