hi, I just bought a sprung hub on eBay. after I won the auction, I found that mk2 is much better than mk1, but I don't know what sprung hub that I bought. anyone know about this sprung hub? I hope it's useable, I sold my BSA A65 rear hub for this one.
"There's a right way, a wrong way, and the Triumph way!"
Egad, mon, what were you thinking? Not only is the sprung hub a horrible wobble producing contraption, the first versions(which looks to me is what you have) were known to explode whilst tootling down the road causing a major league get-off.
Turner himself apologized to the public(those were the days, eh?) by saying that they were using virgin aluminum in the new hubs and no longer had to used melted down B17's for material.
Not to scare you or anything. but there are tales out there about springs flying out of the spring box and embedding into the foreheads of nubes trying to dismantle the things. Unexploded ordinance comes to mind....
I believe the lack of Concentric ribs on the outside is the key recognition feature of the mark I hub. (the ones that exploded) They're getting damned rare, ya know why. Well, if you're making a museum piece, you've scored. If you plan to ride the thing, you've got more hair than me.
Bikes 1974 Commando 1985 Honda Nighthawk 650 1957 Thunderbird/T110 "Flying Tiger" Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
There are a few differences; 1. the rh alloy cover is plain, Mk2's had circular ribs. 2. The brake plate screws onto the hub on Mk1's, slides on on Mk2's. 3. Mk1's have a drum/sprocket, Mk2's have the drum, sprocket and bearing carrier in one casting 4. Mk1's have curved guide blocks, Mk2's have rollers. 5. Mk1's have cup and cone bearings, Mk2's have normal (although an odd size) ball races.
Most people steer clear of riding with Mk1's and only use them for display purposes. The Mk2's are great and a worthwhile addition.