What cylinders are these

[junkyarddog]

What's this cylinder? It's a cub Stamped S1330 and engraved 636,

Anyone know or point me to the online spot that has the info

[BANSHEE HP]

those are numbers from cp and millenium that dont tell you what stroke they are. The stroke is on the upper lip of the intake and casted number like 54, 58,61, 64

[junkyarddog]

I'll have to ask the guy again thanks man