I´m a ovner of one and above husqvarna wrk 260 1991. Is not like that she hawe Power: 17.00 HP (12.4 kW)) @ 5500 RPM , because it has more RPM then that. She has about 10000 RPM, and it has valve, this valve open´s @ above 6000 RPM and that´s like rocket, i´m talking above 50-60 HP just like honda cr 250 or like yamaha yz 250, it´s a same classe for me. Also for the Rear brakes : expanding brake is not thrue, it´s a single disc, check up in a photo -it´s from the left side of the moto. Check up the specifications before posting next time. I´m sorry for bad english, i´m from croatia.