KTM EXC SIX DAYS piece of 2-stroke technology with power and low weight. If 2-stroke punch adding bulk, the EXC is your . its cc counterpart, it remains below enjoying agility advantage compared to larger models the lighter moving engine . that the grids of countless extreme Enduro competitions are teeming with EXCs. Its new, MY 2011 revamped exhaust system as a re-tuned carburettor, for torque, a cooler running engine, and linear power delivery.