1975 & 1976 175's

[skiracer]

I am looking to know what the differences are between a 75 and 76 175, besides the color of the tank...  I have the two of them sitting side by side, and really can't see any visual changes.  The only change I could find, is that the 76 has 12mm shafts on the shocks instead of 10mm.  Any input would be greatly appreciated.

1976 MC 5 Original Owner
1980 KTM GS
1982 Suzuki PE 175
1976 Husqvarna 175GP
2002 KTM 200 EXC
1975 Jackpiner (project)
1976 Penton 175 (project)