I have a 01 XR650R that supposedly has the HRC hop up kit. It doesn't have any air box mods. Will it really make a difference? I was told before I bought the bike how much of an "animal" it was, but it really doesn't seem that powerful. The DR650 I had seemed torque-ier than the XR. Any ideas or thoughts? BTW, the bike is in Supermoto trm and has been geared to 15/45. Thanks in advance!