OEM Honda Grom Valve Spring (2014-2020) #9

Tired valve springs are one of those wear items that hide until they don't. Lose tension and you get valve float at high RPM, sloppy sealing, and power that quietly bleeds away — exactly what you don't want from a Grom that lives near the rev limiter.

This is the genuine Honda valve spring, part number 14751-KYZ-900, built to factory spec for the 2014–2020 Grom 125. It's the right call for a top-end refresh, a head rebuild, or replacing a spring that measures under free-length spec. OEM means correct rate, correct free length, and no guessing.

Your Grom runs one spring per valve, two total. If you're in the head anyway, replace both and inspect your retainers, keepers, and valve stem seals while you're there.

Features

• Genuine Honda OEM part — 14751-KYZ-900
• Factory spring rate and free length for stock and lightly modified engines
• Restores proper valve control and seating
• Ideal for top-end rebuilds and valve jobs
• Sold individually — Grom uses 2 per engine

Fitment

• Honda Grom 125 (MSX125): 2014–2020
• Honda Super Cub C125: 2019–2021
• Honda Monkey 125: 2019–2020