The trouble is if you do too much to the Tenere 's engine in the pursuit of horsepower you will as Pleiades says ruin the bottom end grunt and just end up with a bike that's nearly as powerful as the KTM but still much heavier. ..if you look at what JaumeV has done, and Jmo, great grunty, lighter better handling bikes .. but not so far on the tuning front as to spoil the low end grunt and reliability. I was worried I'd miss the grunt of my XR650R, but as I rack up more miles on it I'm loving it! The thought of tearing down a Green Lane on a 70bhp Tenere is too scary for me!! Steve