engine numbers

[mickfeath.]

Hi, having looked at the engine number on my SIL GP200, I noticed there are just 6 digits, with no reference to the actual model or engine size. Is this correct or not. If not how can i check the c.c of the engine ?

[bazza3004]

My indian gp is the same. Couple of ways to check if its a 150 or 200cc is to either check the measurement between the studs on inlet manifold or the measurement between cylinder studs. Cant recall what either are but the 150cc are closer together than the 200

[mickfeath.]

Thanks Bazza3004.

[bazza3004]

If no one come up with another way (other than taking head off an checking piston dia) i can take the measurements off a 150 barrel (inlet studs) and casing barrel studs spacing tomoz (im on nights atm)