My bike just turned 2000 miles and started misfiring. I replaced plugs before taking it to dealer and found front cylinder spark plug oil fouled.
After putting in new plugs bike ran about 1 minute and started misfiring again. I took the bike in to the dealer and the service writer told me that
the valve seals were leaking and they would install new seals under warranty. I told the s/w that there had to be something else wrong causing
the miss but they told me the new plug fouled right after install. I am a ase certified master auto tech so I know my way around engines and
for a plug to foul this quickly it seems the bike would be smoking like a freight train and it was not. Anybody else have any problems like this

 

While it's not impossible for the service writer to be wrong (LOL!), he's probably seen quite a few of these valve seal problems as they're pretty common. Look in the DIY forums; TC has a write up on 'em.