how do i find out what size my honda dirtbike engine is? i only find # 180cm on it its a old XR or XL?

Question

i bought a old honda dirt bike i was told its a 1978 XR 125 but i cant find any place that tells me what cc's the engine is, it only has the # 180cm3 but its not the original motor, anyone have any ideas? its a 4 stroke engine. the 3 180cm3 is located on the engine under the carborator on the cylinder head. PLEASE HELP

Answer 1

180cm3 means 180cc

Answer 2

My friend is the moderator of this group. He lives and breaths XR's. Ask your question there. A picture of the bike and the vin #s would be helpful.
http://autos.groups.yahoo.com/group/HondaXR/