I change mine at 600 miles because i run the piss outa it. I wouldnt trust 7500 miles between oil changes on anything its just asking for trouble but that's my take on it.
Absolutely.
I've had, in the last four years, a Honda CB1100; a Honda PCX125, a V-Strom 650. ALL of them would let me know when the oil was ready for changing - the CB1100 and V-Strom would start shifting hard; and I'd get valve clatter in the PCX. Sounds insane, but I swear...I still have the PCX. Started hearing clattering (not sure if it has hydraulic tappets; haven't set valves yet) and thought it was time to either buy a manual or go to the stealership.
Changed the oil because it was ready, with 2000 miles (since I bought it; 3800 miles total) and the noise WENT AWAY except for cold starts.
No, with such a limited oil reservoir, you do NOT want to go 7000 miles. Nor 5000. 2000 is pushing it.
The filter can be done every other or even every third, but the oil must-must-must be changed. It's not hard and it's not expensive. Pull the plug, let it drain, plug it up, pour in (almost) a quart. Done.