Looks like 93 is the last year for the 230.
http://www.alpha-sports.com/suzuki_atv_parts.htm
I would check the chain and swingarm bearings and axle bearings before I did anything else. The chain will come off and end up cracking the case if you don't replace any loose bearings.
Try rockymountainatv or bikebandit. Also, get a new chain if you want to be sure it doesn't come off.
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If man could be crossed with a cat it would improve man, but it would deteriorate the cat. - Mark Twain