I'm in km, so I was trying to talk miles.. and I was off! 42,000 km FJR vs. 24,000 km for C14.. The strange this is that in Europe, the GTR14/C14 has a valve service interval similar to the FJR's, but in US/Canada, it's reduced to 24k km.. No idea why.
My SuperTenere has a 26K miles valve...