Originally Posted by 4TooMany
It's easy to verify. When you go to the dealer, take an IR termometer with you (the dealer may have one too). Leave your bike off for a while, then start it up and start up one they have at the dealer and measure the temp difference (after they're both completely warmed up).
I almost bought an IR thermometer today. Instead I went home and tore the bike apart. Spark plugs look good. Both exhaust valves for Cylinder 1 were too tight.
Then I called the dealer. According to the service manager, the valve specs for the F800 are IN .23-33mm and EX .3-.41mm. Of course this differs from from BMW service DVD and my Haynes manual. With the new specs, all of my valves are too tight.
Time to do some math and get new shims.
I came across another potential culprit in the heat issue. So much gunk had built up from chain oil onto my Richochet skid plate that it was gummed up between the catalytic converter and the skid plate. I suppose I could wash my bike more often. Nah.