How hard is it to find parts for older kawaski ninja's
 

I'm thinking about buy an older ninja, 85-90's, 500 or 600cc. How hard is it to find parts for it? Or parts in general for motorcycles?

Which one? There are a number of models. EX500's, C model, D model, etc.

Used parts? It's an older bike now, so they are not common. Lots of parts are available yet new from any Kawasaki dealer directly. What parts are you looking for?

Fliping thru www.denniskirk.com and I found a number of parts like the rectifier, carb rebuild kits, air filters, front and rear sprockets... more parts then are avalible for my motorcycles! and for something as new as 1985, the dealer should be able to get most of the commenly replaced parts as well, they are a popular motorcycle that is reasonably new compared to what I have, being early 1970's and I have verry few problems finding parts, if the dealer doesn't have it, then check after market catologs or Ebay.