putting the motor in is easy, I did an it 465. slight trimming on the swingarm, new front mounts. The old big yammies really needed some head work to stop from detonating. I mounted rubber isolators on the front and bottom motor mounts and on the bars. Vibration on the bars wasn't bad but the vibration on the pegs would put your feet to sleep. you also needed to fill your back pockets with lead shot tom haver enough azz to start it, and if it kicked back, mother of all god, why is my knee impaled into my forehead... The pipe is trhe expensive part.