ZZR250 shock adjustment??

Hi all,
Im new to the forum and bikes as well. Just picked up my first bike, a 95 ZZR250 and have notice when going up my driveway at home it seems and sounds like the rear shock is bottoming out. Im not a small bloke by any stretch, ive seen a couple of threads about adjusting the preload on the rear shock to compensate for the extra kg's which leads me to my first question. How hard is the shock to adjust on the bike? and how much adjustment is in it? I'm north of 100kg and dont want to spend mega $$ on the ZZR as ill be looking to move on after im off my P's.
Cheers
Nick
Im new to the forum and bikes as well. Just picked up my first bike, a 95 ZZR250 and have notice when going up my driveway at home it seems and sounds like the rear shock is bottoming out. Im not a small bloke by any stretch, ive seen a couple of threads about adjusting the preload on the rear shock to compensate for the extra kg's which leads me to my first question. How hard is the shock to adjust on the bike? and how much adjustment is in it? I'm north of 100kg and dont want to spend mega $$ on the ZZR as ill be looking to move on after im off my P's.
Cheers
Nick