Size

• The 1978 Invader 440 has is a liquid-cooled, twin 438 cc engine. It had a maximum rating of 8,000 rpm.
  
  

Horsepower

• Kawasaki didn't release exact horsepower information about any of its vehicles on specification sheets in the late 1970s, but bore and stroke data, like 68 by 60, along with its rpm ratings and size data, indicate an average of about 100 horsepower.
  
  

Speed

• Though horsepower data is unavailable on the Invader 440, vintage engine data reveals that the model had top speeds of between 68 mph and 102 mph on the LTD edition.