​ 85-88 bikes had 60-64 HP

Late 90s through 2001 mellowed out to 56HP

about 222 pounds dry weight

38mm flatside carb

491cc 2 stroke 

89mm x 79mm bore and stroke 

6:7:1 compression ratio

5 speed transmission

2.4 gallon fuel tank capacity

84-86 had rear drum brake and front disc brakes

87 and up have back and front disc brakes 

kayaba shocks

front wheel 21 inch

back wheel 18 inch