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Discussion Starter #1
Ok you Mountian Cat experts what are the diffrence's between the early production 2003 vs late production 2003 machines. I've been told the earley models engines have more power available upon modification. True???? Are all 2003 M1's? Also any tips you may have regarding your experiences on the MC900 would be appreciated.
Just purchased a 2003 with 1000k on the chassie with a fresh engine.

MC900 151" Earley build I think.
 

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Im almost 100 percent sure there is no differance maybe +-1 hp, they all are bored the same,, i know on my dads the only thing that was differant is when he bought his early 03 machine it had a slightly differant pipe, as far as mods go i dont think theres enough to make a differance!!
 

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Discussion Starter #4
Well did a little reserch through the parts catologs. Appears the 2003 900 1M and the the 2003 900SE, 2003 have diffent rear suspension part numbers. So I assume not all 2003 900 are 1M's?
 
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