no leh andy all the way riding NSR250...
he nvr ride tzr250 at all.
i watched the movie again, just to prove you wrong 
at the start of the movie, u see him ride pgm3 vs tzr250.
later at the pub he ride pgm4 vs david wu pgm3.
then at the end of the movie, during the wheelie part, david riding
pgm3, andy riding pgm4. but after they wheelie finish, become both
on pgm4 liao.
although you think they are riding pgm3 becoz of the key ignition
and the speedometer, but that is only in certain scenes, if u look
at the bike closely, it is a pgm4 proarm and pgm4 rear cowl

also another thing many ppl nvr notice is that, at the end andy vs
david that part, coz a scene show andy 200+kmh cup corner.
but if u look at the meter carefully, the numbers are 0 | 20 | 50 |
110 | 140 | 170 | 200 | 230 | 250.
so in actual fact, he is only cornering at 70-100kmh.
it's interesting what you notice once you've watched the movie
several times over 
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