Just to add to Andy's post. The more it's tuned, the more often it will need servicing and special fuel. It depends on how much you want to spend. I would suggest a dyno run to confirm you are getting around 56bhp at the rear wheel. Then make sure the brakes and suspension is in good order. I've read of people going straight on track then discovering they had treacle, not brake fluid, etc
Parts are getting rarer, so you should look out for good spares if you're planning on keeping it for a while.
A translated workshop manual and parts guide will be useful
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