Make sure you have him sign for delivery, it's the only way PayPal will cover you.
There's always the chance he says the bike is not as described, does a chargeback, etc. You may also prefer that he pay with some type of money order, but it would be up to him if he were willing to send you payment before you shipping the bike.
(I got burned selling an iPhone. Zero feedback buyer said the phone arrived broken, and PayPal sided with her with no photos, police report, etc. I was out $350.)