I am kind of ignorant on this subject. What are the different trim models of the VWs? Are the earlier engines different than the newer? What kind of service should I look for (timing belt, water pump, etc)? Throw some knowledge at me.

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R