I am going to look at a 92 Phazer II tomorrow and I am not sure what the differance between these are? I am fairly knowledgeable about the 1980's phazer 480 f/c.
Back to the original question; the differences between the early Phazer and the Phazer II.
There were quite a few differences between the "I" and II. I did not know about most of them until I got a newer one. Many of them are not readily noticeable.
Beside the longer track, wider ski stance (along with the different struts with the knee joint in front), hand and thumb warmers, and plastic belly pan previously mentioned, the handlebars were wider and the brake disc was larger. The II also had self adjusting brakes. The voltage regulator was different and mounted in a different place. The footrests had vent holes. The I had a stabilizer bar, the II did not. The skis were made heavier on later models (the early skis were quite flimsy), I think that change may have come with the II.
I think that the windshield was changed to the lower one before the Phazer II, but am not sure about that.
I know there were others but can't remember them right now.
It would be good to have a listing of all the changes. Does anyone know any others?