210 kit, special item?

[TexFest]

Is there some reason these rings were named, the 210 kit? :wondering

http://cgi.ebay.com/ebaymotors/HONDA-ATC185-185S-200-PISTON-RINGS-BIG-ALS-210-KIT_W0QQcmdZViewItemQQcategoryZ43977QQihZ002QQitem Z120012574547QQrdZ1QQsspagenameZWD1V

[MTS]

Probably went with a Big bore piston, Or sleave .....Big al's made alot of cool stuff for the honda Uts back in the day.