i am not sure of the 2003 gsxr 600. but i have an 07' gsxr and i had mine to 171 on the highway in 6th gear.
year 1989-1993 140mph 1994-2008 135mph
My k8 has indicated 177 via the speedo, but a GPS indicated 168mph. That's with full 2 bros exhaust, 0/+2 gearing, and a PCIII.
According to Car and Driver magazine, "the top speed of a 2003 Nissan Maxima is uncertain, but it is drag limited at 147 mph." The 2003 Nissan Maxima Owner's Manual lists a top speed of 135 mph.
660
stock speed is slightly above 160mph
Top Speed - 2003 was released on: USA: 17 April 2003 (premiere) France: 22 June 2005 Japan: 1 January 2006 (IMAX version)
The top speed of the 1997-2003 Grand Prix GTP is 126mph (limited). If the speed limiter is disabled, the top speed will be increased to over 140mph.
Really the top speed of an crf450x is going to be around 75 to 80 mph....stock.
Around 90 mph.
limited to 155mph in the US.
117 mph
The speed limiter program is located in the ECU. Some companies make "boxes" to fool the ECU. Otherwise, unplug the speed sensor, and use a portable GPS to measure speed.