Seat height on the 09 is 985 mm or 38.8 inches.
Pro Circuit pipe for KTM 50 is between $199 and $250 depending on where you buy one.
the engine power and the seat height
yes there is the ktm ktm 85 ktm 110 ktm 125 ktm 150 ktm 250 ktm 500
132hp turbo converted with à small ic
The 250sx has about 47 hp and does 71 mph (stock).
The seat latch bolts to the frame through the gas tank. The seat latch will screw out like a bolt.
Transmission: Motorex Top Speed 15W50
According to MXA, the 2002 (couldn't find data on 2003) dyno'd at 49.9 hp.
You can find that info , as well as a lot more, here: http://motocross.transworld.net/2003/07/09/2004-ktm-125-sx-200-sx-250-sx-and-525-sx/
No, the 620 kicker is much longer than the 200. the 200 shares the parts from a 125. the 620 would need a kicker from at least a 250.
2009 KTM 250SX retail price $6598