Anybody know a good (and cheap) online store where I can get parts for my '81 KZ 650?

 

oldbikebarn.com or bikebandit.com both carry many items for your bike.

 

Try this place
http://www.z1enterprises.com/

 

TurboKawi is right. z1enterprises is THE best place to buy vintage japanese bike (especially Kawasakis) parts.
Their customer service is second to none......PERIOD!
Give them a try, you will not be disappointed.
Jim

 

theres deniskirk and see if there's any shops close to you house they should be able to get you parts.

 

the only place that is reasonable is www.oldbikebarn.com, they have a wide selection, and theie fast at getting it to you.