RK 420MXZ Chain - 120 Links

100 Link:
Fits CRF110 with stock comp swingarm and stock 14/38 gearing (96 Links). Can be used on bigger rear sprockets but keep in mind that axle position can change fitment as well.
110 Link:
Used for many MX style swingarm setups depending on gearing. Be sure to count your links so you don't end up short.
120 Link:
Used for just about all setups for the 110cc and smaller. Will require you to cut to length unless you need exactly 120 links.

Stock Chain Lengths:
86 Link = 2013-Current Honda CRF110 & 2002-Current Kawasaki KLX110 & KLX110R (Only fits the above with stock swingarms and gearing)
90 Link = 2010-Current Kawasaki KLX110L (Only fits with stock swingarms and gearing)