Suzuki 2 Strokes

A couple of issues before this TC250 is ready for the road. I have tried and tried to get the tension right on the chain to no avail. Same sprockets that came with the bike and they look fine to me. Was studying it carefully yesterday and notice the wheel cannot be true. As I turn it and look down the side of the wheel, the rim moves out slightly in one area. I now think that is causing the chain tension problems.
Never changed spokes or trued a wheel before. Shall I just take it somewhere or attempt it myself? How hard is it to do and what would I need?

Doug.
Your rim has nothing to do with chain tension. Either you have a used chain with a stretched area on it, or you have a sprocket that isn't concentric. Your rim issues is most likely due to the rim not being perfectly straight in the first place. No amount of spoke tweaking will straighten a bent rim. The TC250 is definitely worthy of your efforts though. Keep at it. A solution will present itself, I'm sure. Cheers.
Fred

Thanks Fred. Great info! The chain is the original I'm sure and was really rusty before I cleaned it up. 42 years old so It's likely stretched somewhere. Guess I'll shop for a new chain first. Same one as the T20.