Ive been battling the bog and stutters associated with my 2014 pro rmk since the Silber Turbo ecu reflash kit first came out. After the first year silber came out with an update which is decent. Works great on the trail but to often stutters and cuts out in the steep and deep or heavy snow of the BC mountains when in and out of the throttle. I finally decided to try mtntk tune on it and had my first day ever with no bogs or stutters. It was the best day ever!! I haven't done any long pulls yet. But also had no more lean popping on the trail on the way down the mountain when in and out of the throttle.