Originally Posted by ducnut
Both, my Daytona 675 and Tiger 1050 made/make that noise. Valves were/are all in spec. I ran/run the specified viscosity oil. The Daytona had nearly 3500 track miles on it and was ridden nearly year-'round. I ride the Tiger, year-'round. I wouldn't worry about a little valve clatter, upon start up. Once things get warmed up a bit, valve tolerances tighten.
For what it's worth, mine started making that startup clatter at about 6,000 miles. It irritated me, so I followed the procedure in the manual for removing the tensioner. Looking at it, I saw that the resister ring (the piece tht holds the plunger in place in absence of oil pressure) was out of position. I reset the ring and reinstalled the tensioner and no more noise.