Hi all

just been and bought a Sherco trials bike and the guy said it was a 250cc but I am not so sure.

ive found out what year it is by the vin No on the side of the headtube and from what I can find on the web the numbers on the back left side of the engine are the engine size but mine doesn’t make any sense here is the No st55 5523 

Double check the numbers, I suspect they will actually be ST25.

Without looking at my bike I don't think there are any numbers on the cylinder & head to give you the engine size, the 250 & 290 share everything but the piston, cylinder & head so the engine number isn't the only a sure indicator of actual size

Thanks for the reply mate

 

contacted a uk Sherco dealer and they have confirmed it’s a 250 so all is good ?