Anyone know what would keep my 2006 kingpin from upshifting? I have to keep the engine at idle and try several times. After it warms up it does better but overal it is hit and miss. I had put some yamalube in instead of victory oil on my last oil change and within 200 miles it started giving me fits. I have since changed back to victory oil but the problem wont go away. It happened last summer in 100 degree weather so I dont know if I have lost the temper in a spring somewhere. Just wondering if there is anyone else out there with the same problem. Oh and works fine on the downshifts.