Quote Originally Posted by Pete Gagan View Post
Lane and I rode together for a while. I was on my Brough Superior, and didn't feel the need to slow down for him. I'd estimate he was doing 50-60 mph quite comfortably, with lots of reserve. When the OHV Excelsior replica was built, internal details of the Cyclone were used. The Ex put out 50 BHP at the rear wheel, which puts it in the Vincent category. I doubt the Cyclone is much different. Both are way lighter than a Vincent twin.
Pete
Bob Chantland had his Cyclone motor in disassembly (top end off) at the St Paul Viking meet a few years back, and I was amazed at how small the valves were. I remember reading that the cams were timed quite radically, but especially since the Ex's were running such big intakes I couldn't figure why the cyclone wasn't. .. now I can't remember if it was an 8-valve.