Ya that bites for the guys that expected premium performance, been there, have done that.
1997 Yamaha SX, when I bought it on a Spring check, I was told by dealer that it would outrun the then Yamaha King 800 4 cylinder 2 stroke. It was probably the best handling sled on the market on smooth trails, but it fell on its’s face at 85 dreameter and would not run with my buddies 800.
So in comes Olav Aeen with an article in that years SnoTech magazine on how to add some ponies to that red head triple with his pipes and some motor mods. Yep it made a huge difference and that thing rocked afterwards! Thank You Olav, and you know what, to the sales guy at that dealer!