Does the ngine turn over on the kickstartand feel like it has decent compression.
What shape are the exhaust pipes.
The carbs on the K7 and K8 are a bit more work, but not an issue.
Decent sprokets and chain? The K8 uses a larger chain than earlier versions. Expensive to replace or convert backwards.
Is the 17” rear rim in decent condition? Hard to find good replacements
Otherwise, all the usual stuff. Most parts available.