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Discussion Starter #1
I've been looking over photos of various years of CM 400 models. I looks to me that the fuel tank style changed from 1980 to 1981; 1980 being more tear-drop, cruiser and 1981 being more "oval" (back of tank taller). does anyone know if this is correct? and, if so, are tanks from 1980 fairly interchangeable with 1981?
 

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Possibly what you are comparing is the CB400 tank which is more oval and taller in the back than the CM tank. The CM450 tanks (82) are also larger (3.4 gal) than the CM400 tanks (2.5 gal). All the CB/CM400/450 tanks will bolt up to the frame, however, the front of the CM seat will not match up with the back of the CB tank.
 
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