SMR Factory Clutch Spring Upgrade 80% Stiffer - Honda Grom/Monkey 125Sex Machine Racing 6pc Spring Clutch Upgrade 80% Stiffer was made for riders with higher horse power motors. Pick one up now to increase your clutch performance and reduce slipping issues!

It is easy to manipulate and adjust in case you want to fine-tune your machine

Using ISO9001:2008 standard every process in making the wheel is logged and stored with unique Serial Number

These OEM Clips from Honda are for the Ruckus / NPS50

Kits include wrench with adjuster

The double V-reeds construction is patented and thanks to its huge inlet diameter and an optimized airflow

GY6 125cc and 150cc engine

big valve cylinder head

The aRacer X Tune app comes in two different styles

It penetrates deep inside the chain-link whether it be an O-Ring type or a non-O-Ring

Pulley 18x14 sliders

Mounting Hardware

Standard/Revsrse shift