throttle position sync MUST be done in addition to other things
replace the spark plug...the 690 is sensitive to spark issues. also look at the plug cap...mine was cracked
clean injector. if i open the line after or at the inline filter i disconnect the injector and flow a bit of fuel through....the hole in the injector is so small you will never see the shit that clogges it.
the last problem I had was stalling and it turned out to be the main/starter relay going bad. I would try the other things first starting with the throttle sync
Ride the DEZ
05 FE 550 Husaberg plated
08 FE 650 Husaberg plated
01 DR Frankenbike 650