Hi all,
My 83 GPz1100 unitrak is popping and banging through the exhaust once it warms up. I'm running the standard DFI.
It starts first time on the starter and runs fine for the first few minutes. Then once its warmed up it starts to pop and bang on tickover and when revved.
It starts with a few pops every few seconds then gets progressively worse as it warms through, until it will let out an almighty bang every 20 seconds or so and lots of popping.
So far I've...
Replaced the coils with dynas (it now runs exactly as badly as with the old OEM coils)
Ignition leads are new as well as caps
New plugs
The pulsing coils check out to spec on my multimeter.
Throttle bodies have been synchronised with a vacuum guage
It seems to be pulling fuel thru strongly
Doesn't seem to be any air leaks on the inlet rubbers.
No codes flashing on the control box
Only thing I can think of is valve clearances are out (although these were set within specs a few months ago and the bike has done hardly any miles)
Attached is a pic of the plugs. They don't look a consistent colour so it's not happy about something.