Hi,
Where is the engine number located please?
Sorry such a basic question, I don't know much about these, don't have a manual & search didn't yield anything.
Could do with knowing before Tues
Cheers

No worries, looking in the gsxr section i can see links to the manuals.

btw, does the 73a have any real "avoid" issues?

Its on the top of crank case on right hand side