So I have had this issue once when the bike was stock, and it went away on its own.
4 months later, it's not stock now for a few months and it's back again.
So, it won't idle properly when it's warmed up, keeps dropping off and then picking up again just before it stalls, and when cruising along at low throttle it does the same to the point I stop going towards until I wack the throttle open.
Which in low traffic speeds makes me kangaroo, and isn't safe or fun.
I have reset the ECU and TPS but no difference.
The spark is fine, cleaned the airfilter and checked there is no air leaks.
Exhaust is fine too, did the valves about 1000km ago.
Oil was the same time too.
I have fitted new exhaust, air intake system, Efie device a couple of months ago and it's has been running fine until last week.
Spark plug is a good light tea colour.
I'm at a loss as to what this is?
Oh and I'm not going back to the dealer, as every time I have it comes back in a worse state, even had it back once and it was covered in oil and leakin,and the bolts for the top fork brace were missing.