picked and 82 xs400sj yamaha 3 years ago. ran bone stock for 1.5 years. crusing speed it did 70 -80 no problem for myself (150 pounds) all day. the past 1.5 years ive dumped it due to oncoming traffic and sand. not bad couple scapes and bumps there. picked up and rode away. strutted swing arm and custom made pipes along with rejet. itll outrun a harley tc88 with cams. it cruises best around 90 and tops at 105. itll pull the front wheel off the ground. dynod at + 2 for displacement