After a good warm up and a decent 15 minute ride (city streets, no highway), I park and grab a bite to eat. Finished 20 minutes later and come back to the bike and complete the pre-ride check (no fluid leaks, in neutral, visual checks ok, etc.) and the starter has a tough time turning over. After a couple tries, the engine finally kicks in. This doesn't happen that often but trying to figure out why it does that. For reference, I've had all the recalls done by my Yamaha dealership.