How do you set timing on 1987 sp 200 suzuki?

If you are talking about ignition timing then the answer is easy. You don't. Suzuki's PEI (Pointless Electronic Ignition) takes care of timing the spark. If you are talking about valve timing-resubmit and I will take a stab at explaining it.

There is no way to remap the electronic ignition system to change the spark timing.