We’ve compiled some of the most important things to look for when buying a vintage motorcycle. Be sure to read these points before handing over the cash as they will help your decision making or at least give you the ammo to negotiate. These primarily apply to a bike that hasn’t run in years. Just like this 1975 Norton Commando.
Engine
Activate the kickstarter to determine if the engine is stuck from sitting or mechanical failure.
Visually check the entire exhaust system. Ensure it’s intact and free of rust and holes.
Gearbox
If possible, shift through the gears to check the transmission. This will be much easer if the wheels are able to turn.
Carburetion and Lubrication
Twist the throttle to see if the carburetor slides move freely. Also, exercise the clutch lever to test for normal movement.
Peek inside of the gas tank for rust or evaporated fuel varnish. Press firmly on the tank, especially on the underside, to locate any holes, rust or soft spots.
Be sure to check the oil to examine the level and the quality, inspect for any abnormalities.
If the motorcycle is equipped with an air box check for rodent nesting. In this case the air box was removed.
Frame and Forks
Confirm that the engine and frame numbers match. British bikes will typically be an exact match. It’s not unusual for Japanese bikes to have slightly different digits.
Wheels, Brakes and Tires
Roll the motorcycle back and forth listening for abnormal sounds or movement.
Check for smooth operation of the front and rear suspension. It’s not uncommon for the front forks to be stuck.
Observe both wheels for missing spokes, bends, etc. While you’re at the back wheel, move the wheel itself from side to side for any play in the swing arm.
Attempt to actuate the front and rear brakes. Be aware, if the motorcycle has been sitting for an extended amount of time and equipped with hydraulic brakes this may cause them to lock up. If this happens, loosen the bleeder to free them off.
Electrical
Locate the wiring harness, under the seat and inside the headlight to examine the condition of the wires. Look for any evidence of short circuiting, burnt wires, etc.
Additionally, inspect the battery and keep an eye out for damage caused by freezing or acid.
Look at the instrumentation for mileage, broken glass or bezels. Check that the switch gear, located on the handlebars, moves freely.
Check if the motorcycle has the proper lenses and for any cracks. British lights are typically stamped with Lucas and Japanese are Stanley.
If the keys are available, test them in the ignition and fork lock for proper function.
And lastly
Check the operation of both the side stand and center stand.
Ask if the sale includes all of the needed paperwork, like the title or transferable registration.
Look at the overall condition of the paint work. Ask if it’s original or repainted.
Hopefully these points were helpful and save you from a headache or two down the road. Good luck!