Generic Top-End Cylinder/Piston Gasket Kit Mod-G33S-2990 for Honda TRX350 (2000–2006)

This is a top-end cylinder, piston and gasket kit sold under the Generic brand with manufacturer part number Mod-G33S-2990. The kit is identified in source references as 12100-HN5 and lists several interchange and OE numbers.

The source specifies compatibility with Honda Rancher TRX350 model years 2000–2006. Key characteristics from the listing include an aluminum cylinder, 78.5 mm bore size, and air cooling.