If the bike had 1000 and looked new... than it has to be something like an R1. There is no way in hell your 2000GT can keep up with an R1 your talking about a 10second quartermile bike here!!!!
Look at this video... this is a 1000 liter bike (R1) and yes the car holds with it but it's 240ZX with C5 5.7Liter LS1 and SUPERCHARGER... (650HP) and still it can't pass the bike.
http://movies.taner.net/darius/Darius-240Z-R1.mpg
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Lizard King, Bone Stock; 13.69 at 101MPH
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Extreme Burnout
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2000GT VS LS1
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Quartermile run
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2000GT vs LX Stang