2010 FZ8s loose power/revs after a long ride

[Lucky Phil]

Hi guys, first post. I picked up a 2010 FZ8s a few months back. The bike is having a strange problem, that has happened on both the long rides i have done on it.

I go for a longish ride, about 200Km, stop for a couple of hours, then start the ride home again. 
After around 1 hour riding (speed approx 100Kmh) the bike will loose revs and will not accelerate. If i try to rev seems to intermittently rev then stop reving.
I pull to the side of the road and twist the throttle a few time and it seems to rev ok, then off I go for about another 30 minutes, then it will happen again.

I ride to work most days, doing 15 minutes at 60Kmh and around another 15 minutes at 110Kmh on the highway and have no problem.
 

Any ideas would be appreciated.

[Grahamm]

Welcome :-)

My first thought would be possibly the Throttle Position Sensor, but it's odd that it doesn't happen in day-to-day riding.

Still, get a copy of the manual and, if it's like the FZ6, you can put the instrument into Diag mode and check the TPS scrolls smoothly up and down the range with no skips or hesitations.

I know the FZ6 had a recall for faulty TPSs, but I would have hoped that Yamaha had learned from that...