Forgive me as I am not a P11er, I ventured onto this forum just for a peek.
Gotta say tho, these P11s are handsome beasts. The frame looks incredibly sturdy, almost Rickman Matisse esque in its design.
Are they as good to ride as they look ?
You are a motorcyclist, what's to forgive?
Fairly certain the P11 is built around a Matchless singles frame with a 750cc Norton Atlas motor stuffed in it. Someone will inevitably tell me I am wrong, but that is what I'm here for. Ron?
My P11 feels light weight with a low center of gravity, and very quick handling. I actually don't feel the wind on my chest that much or the light front end at 80mph, but my suspension is not stock, and I rode high bar off road and dual sport motorcycles for I don't know how long. One gets accustomed to the feel of wind and lighter front end.
My motor has a re-balanced and lightened crank in it. It vibrates at idle, but is relatively smooth at speed. I had a Commando and that thing would spin around in circles on the center stand at idle. P11 probably would too, but no center stand.
Near its limits, my P11 is a bit like riding a wet noodle compared to something with modern frame technology and a beefier swing arm. The little brakes are not very useful at higher speeds. Only good for one 90 mile an hour corner entry, then backing off the throttle for the rest of the ride is the only way to survive to live another day. The brakes are suitable for riding at the speed limit as long as applied early enough and both front and rear brakes are used. My opinion of course. I've only owned about 30 bikes, so my sampling could be too small to be relevant.
I've been dragging that P11 around with me since the early 1970's. Nothing else I've owned has been as interesting to ride. Well, that's what I tell myself anyway. Actually, its too hard a sell at my price point configured like it is, so I've held onto it. Last one in the stable.