[Ro Co]

Hi All,

I was doing some tuning yesterday on my 02 R1100s (new to me). New air filter, plugs, set the valves and then took off for a ride to warm it for a TB sync. I completed the idle sync but when I tried to sync at 2k rpm things went a little sideways. The balance was way out off idle and trying to get it a a steady 2k was not possible. The bike would come up as normal but after a second or 2 it would cut back to just above idle and then back up 2K and continue this cycle. (2K for a sec drop back to idle for a sec, up to 2k). The bike didn't sputter or stumble just switched between the two ranges like someone was flipping a switch. Making adjustments when I could I noticed that the closer in sync the TB's the further up the rpm range the cut back happens.

TB's are now sync'd at idle and 2K and the bike is much smoother. Cut back still happens at ~ 4K.

My question is this. Is this the surging issue that people talk about? and should I try the zero=zero adjustment as a fix?

I have never really noticed a surge on acceleration but have felt this same cut of rpm when slowing down, coming off cruise speed.

Other notes -
Bikes is stock with 38k KMs
Old plugs were a touch chaulky white
Bike pops a little on decel
Choke is now 100% better after sync

Any advice is appreciated. Thanks, RoCo