The Combat disaster was not youth doing their expected thing on a bike sold as the badest superbike out there at the time, even against the H2's. Re-read the couple pages posted on Combat saga cascade of one little thing and another adding up to the eventual failure of Norton. Factory valves set up will float and cut power with horrific noise and roughness before a Combat blows up I found. Weakness most dangerous link is cast iron flywheel, next would be the oil comma slot piston if still inside as they were in my Trixie to come apart at 50 mph coasting looking at flowers speed, tinkle-tinkle> locked rear drift till clutched. My pre Peel was the hot rod test bike for sales then famous hot rod hoolian bike for couple decades before I got it and wrung its little neck out, not knowing any better after only Norton experience being my P!! with 9grand marked on tach so that's all I ran it too as often as I dared. I have lost most a decade off Ms Peel d/t a stuck throttle event as she was all ready to put the Drouin on but for the drive train upgrades back then. Oh yeah plain Jane well tuned Combat will not float valves till after 7200 in mine. This can happen on a pass just going by the strong increasing pull sense you need to keep up to get on around in time... or not...