Count your sprocket teeth.
If it's 10/22 it's a 520 size chain.
If it's 12/26 it's 428.
I use #40 chain on 428 size sprockets cuz of the availability of 1/2 links.
Some say you can find 428 1/2 links.
The end result is~~you need one of my "kick ***" chain tensioners.
2000 GNC 5N\
2001 GNC 9N \ 40+ class
2004 GNC 9N /
2014 rock crusher "GO tortoise GO!"
2016 Byrd Rooster
Father of the "11" time National champion,and worlds fastest woman ATV racer
A few fast LT80's
250R~300cc's
300ex
350 Rancher
Kymco Mongoose
Survivor of the 12 Hours of ATV America 04 and 05