satin black from plasticote is a semi gloss black which matches original paint. i have mixed paints before so i go with gloss , semi gloss or flat black which is more common terms.
im surprised no one mentions the seats themselves.. 72 almost straight and flat 73 raised in back straight .. 74 75 has the dip up the back of seat not much but its there.
the shocks were mounted outside of skis up to mid 74 when they changed to center of skis..
the skis themselves are same but the shock bumpers are different. the low profile with lbracket windshield wasnt standard on jdx some came with regular windshield.
the 73 jdx has a steel tunnel the others were aluminum. the belt guard changes from model to model .. i have seen plastic on early jdx and steel on 75 300
73 models had the comet clutch as secondary salsbury clutch was used previous to that but again not every sled had them some already had comets.
most steel tanks are silver cadium plated however some got sprayed with sled color which is more of a factory error than a standard.
There are two seats; the molded and the straight. The difference between the 72 molded and the 73 on up, is the size of the hole for the tail light. The straight seat was used on the 73 X4 and the 74 300.
As we all know, 72 skis are unique to 72. The springs seem to have less arch, the rubber bumper is smaller.
Shocks; outside in 73, inside in 74. ( or at mechanics discretion ) 340/S was the first with shock on top.
73s came with Salsbury clutching. There was an update program to convert to Comet.
72s have green gas tanks, all the rest were silver.
Troy mentioned the heat shield, I think that came in '74.
