I think that's mostly for the 750F and 650. Could be wrong, though. If I read my info right, for those two models, Honda decided (in their infinite wisdom) to narrow the clearance thereby somehow keeping the oil cleaner (?) to lengthen the time between oil changes to match or beat the competition... because hondas are supposed to be low-maintenance, right? Unfortunately that meant 650s would be notorious for burning valves.
SO....
slappy valves are happy valves.