Based on what little I can see of the swingarm it's either 87 or 88. In 85 and 86 they had a cam type chain adjuster. In 87 they changed to bolts and slots. If it has a starter then it's a 230E, but it doesn't look like one. It could have a Goki starter which were popular add-ons back in the 80s. If so that may be worth more than the quad. Post a pic of the mag cover and I could say more. Honestly, you have a lot of work ahead of you. It looks like the swingarm bearings are toast, which is a common problem. Another common problem is the chain coming off and smashing the magneto cover. Those run about $200 if you can find them anymore. If you have a Goki you definitely don't want to smash that. Also the wrist pin is rather weak which lets the piston flop around leading to smoking. In 1990 they up graded from 16mm pin to 17mm, but they only made those engines 2 years and are really hard to find. A 230 that doesn't smoke is pretty rare. You're going to have to replace practically everything from a-arm bushings and swingarm bearings to magneto coils and maybe valves. The amount of work involved isn't going to be worth it unless you just like to work and spend money. That quad was one of the first and Suzuki cleaned up many of the problems in 1990. If you could post what you have of the VIN and some more pics of the side and swingarm I could say more. Also what is your goal with the quad? Edit. I'm sorry. I meant to say 1989 and 1990 is when Suzuki cleaned up the problems with the 230. They did it to compete with Honda's 250X.