so you want to stick with the same 530 chain and same links? You could just change the front sprocket to one tooth less and keep the chain. You'll notice a little difference... If you add teeth to the rear you'll need a new chain for sure.
Most people go with a 520 kit, and change both sprockets at the same time. 1 down, 3 up is a good torque improvement and wont lose too much from the top end....
Here's the link to the RK chain / Kawasaki kits, although your bike is pretty old, and not listed, it won't be that hard to get the right ones, but this will give you an idea. Just let me know what you want and I'll get you a better price than retail.
If weight isn't a big deal to you, get steel. They wont wear out fast like aluminum. And the Gold chains are sweet.
Example Kit from RK:
