Turns out that for KTM decided to change the cylinder head around a bit on the 2015 250XC-W and XC. They have lower compression that the previous years...and from what i hear, a non-working squish band. I heard that KTM wanted the 250 engine to be more "linear"? Sounds to me that the 2015 250 XC-W/XC bikes were "Ready To Ride", not "Ready To Race". When Kootenai Rider gets back from racing the B1K, i'm hoping i can convince him to swap cylinder heads with me so that i can perform compression tests on both our bikes so that i can get to the bottom of this. But what i really need is to test ride a 300XC-W for a few minutes... I'll be on my 450, recently converted to 525 tomorrow. It will be my first trail ride on the full DJH engine rebuild. I need one shakedown ride on it before i head to LAB2V next week.