I can usually spot a "richard cranium" pretty quick. I've done deals in the past where they hand me the cash to hold while they take a test ride.
Actually, the last bike I sold was a KTM 450. The guy wanted to take it down the street just to make sure it shifted properly through the gears. I asked him if he knew what he was doing and he looked at me like I was an ***** and told me he'd ridden all his life. He pulled out of the drive hit the gas and promptly did a feet up sideways power wheelie right into the ditch.....
I run down the street to see if he's OK and he gets up all scraped up and says, "I'll take it!"
Be careful.....
Haaa! hahaha. I guess that was one Richard Cranium that slipped through the "net".
I've never bought a used bike without a test ride and walked away from one that the owner refused.
I guess that wasn't a very good deal then, or you'd have bought it anyway.
What the heck is a two minute test ride going to show you that you can't tell already by starting it, listening to it, shifting through the gear box (stationary) and feeling the clutch, all in the driveway? Maybe the tires are out of balance? whatever...