There has also been discussion about decreasing engine life when taking out the balance shafts. I talked to my mechanic and he told me on the skidoos equiped with balance shafts they take them out and it noticeably decreases engine life, up to 50%.

I asked people to describe the type of power gain, and the best description I got was you know how slow and luggish your car runs with the A/C on... well turn the A/C off and that is like removing your balance shafts.