High-G FJR Junkie!
Join Date: Jan 2013
Location: Millgrove, ON, CA
It does kinda sound like a TPS problem. You won't likely find a coil problem, nor will the sync drastically change what you're describing.
What happens with the TPS is (and it can test good, btw) the fingers or wipers on the resistance board wear into the board. Now the ECU is not seeing consistent throttle position. It's a pricey little part. I posted a write-up by a friend of mine on another forum somewhere here, will have to find it. Basically, you can backprobe the connector and test it that way, even monitor it say on a short ride.
Keep yer stick on the ice....
2014 FJR1300A - Root Beer (sold)
2009 CBF1000A - Sienna Red
1999 VFR800Fi - Pearl Shining Yellow