I had the ECU remapped on my 01 1150 GS. Made a huge difference, similar to the freedom of removing the cat. Smoother, cleaner revving, better economy (if i did not thrash it that is). All in all a better bike. Let another GSER have a go the other day and he was shocked in the difference to his own cat free bike and mine. He is now saving his pennies to have his ECU remapped