Little toy motorcycle similar to his?
GSXR track banner to hang up in his garage?
Rear or front stand if he needs one?
Bike cover if he does not already have one? Keeps the dust off in the winter while sitting..
Color matched wind screen?
New visor for his helmet, if he just has a clear one, maybe get him a nice chrome or other fancy type..
I could probably go on futher.. do I need to? How much do you want to spend?