125-200cc wr 125 00 vs 05?

I have an oportunity to change my 2000 wr 125 to an 2005.
Can anyone tell me all the diferences please?

Main differences are...... Revised frame geometry (less rake), CR transmission ratios, larger diameter front and rear axles, newer style front and rear fenders and '05 only 2 stroke side number plates. Might have a slightly revised swingarm and compression adjusters on shock are newer style.

Suspension may have some other small changes, but not a lot different than older model.

Thanks norm, can you think it´s signficant?
Rear shock in practice is better?

The Sachs shock has improved every year, so yes it is better. Also easier to adjust the high and low speed compression settings compared to '00 and the little spanner needed for that shock.

The 05 shock fit on the 2000?

It should fit the '00 bike.