“DID ZVM-X & Sunstar Service Kit (+)” Oil-cooled
is a menu we offer. It’s fine even if it’s not oil-cooled ★

What’s a good guideline for when to replace the chain and sprocket?
Both mileage and time are hard to pin down…
The guideline is really the wear on the sprocket and one-sided stretch of the chain.
↑Like in the photo above, the front drive sprocket is in a “pointy” state

A fresh sprocket with plenty of teeth has very little play ★
It’s packed in tight ★

Rattling and missing teeth ★ The play from throttle ON/OFF is pretty substantial.
It looks sad ★

When you pull the worn sprocket to the left, it moves quite a bit ★

Even when you shift it to the right~
The chain rollers are getting “clack clack clack clack” hammered between them, so it’s in pretty rough working condition.
Chain and sprocket cleaning and lubrication
or maybe it’s time to think about retirement for them!
