Tighten the chain on a 1988 Suzuki 230?

There should be 4 bolts on the back between the brakes and the sprocket, the top two will have slots that should be of equal distance once finished. Loosen all 4 bolts then take the jam nut loose at...

That should be in the manual, if you don't have that if I remember right you have to pop off the chain cover and loosen the bolts behind the sprocket then you loosen those two loops on the back of...

Suzuki Bandits have an automatic cam chain tensioner. No manual adjustment is necessary or possible.

Here is where you can find the specs http://sites.google.com/site/suzukilt230svault/specs-info

with a spanner