I have an 85 Harley FXR that I bought new .. I put a 124 in. SnS motor in it 2 yrs ago .. 150 hp to the back wheel .. First thing I did was rip the tranny to bits .. Its a wild ride ..I am tamed down quite a bit these days though .. Getting old . Our elevation is only about 1200 ft .. I used to fly full size and had my own plane . I love the mountains .