Posted - 24 Aug 2012 : 5:46:43 PM I believe both Triumph and Norton went silly. They had a decision to make - build either a fast nimble vibtating bike, or a smooth slow touring bike. The commando is a poor compromise. The standard crank is balanced to 58% so it doesn't shake the bike at low revs. At high revs the crankcases split, and the bearings fail. In addition the gearbox has silly ratios. Four valve per cylinder heads were not going to save Triumph. The Norton head with the squish band is better anyway. And no road rider needs an old technology parallel twin revving to 9000 .
