General Comments:
The SV650 has a bullet prof V-Twin engine that delivers torque in spades... The bike will wheelie under full throttle in 1st and 2nd gears... It is not a power house, but has enough to move a 200 lbs rider with ease...
With regular maintenance, this bike will give you thousands of miles of trouble free service... Word of advice... Break in your engine properly, and adjust valves lash as soon as the engine is completely broken in... Do NOT wait for the recommended 15,000 mile service to adjust valves...
Chassis handles very well... However suspension is too soft for riders above 170 lbs. If you are a heavier rider, consider working on the suspension before anything else (excluding of course, safety gear!!!)... Once suspension is dialed in and a few adjustments to geometry, the SV650 turns into a very capable V-Twin sport bike... From there any beginner rider can learn to ride to a high performance level... Limiting factor is the rider...
Final drive is OK for commuting and easy riding... If you want to wake up your bike's throttle response, I would recommend 15 tooth front sprocket and a 47 tooth rear sprocket... Do NOT go -1 on the front +2 on the rear... You will hate it!!!
I think one other thing worth mentioning is that there is an endless supply of GSXR bolt on upgrades... As well as a extensive selection of aftermarket parts and accessories available... Backed with an army of followers that know this bike inside and out...
As with all motorcycles: Service your bike regularly... Check your tire pressures at least once a week.. Clean and lubricate your chain regularly (300 mile intervals)... And wear all your gear every time you ride...