A motorcycle in decrepit shape is not only dangerous for you, but also for those around you. At the very least, regularly check the tire pressures and keep them within the manufacturer’s suggested levels. Handling characteristics could be negatively affected if they are too low or too high.
Beyond tires, simple maintenance items include checking oil and fluid levels, and making sure they’re within spec. For those motorcycles with chain or belt drives, check the condition of each and ensure the chain’s slack is within tolerance and the belt isn’t starting to crack or fray.
Make sure nothing’s leaking, either on the ground or on the motorcycle. If any of the above items seem wrong, and you’re not sure how to fix them, it’s best to take your bike to a reputable shop. Sure, this section isn’t a riding tip, per se, but proper maintenance is important enough that we’re including it here. And it provides an opportunity to become better acquainted with your machine.