So problem is this. Bike starts good and idle good, driving a while it might start to backfire and refuse to rev without backfiring and lunging forward (loosing power and then suddenly getting power) some times EFI error light comes on with one long and 2 short flashes = ERROR_INJ1(1cylinder injector)_SCG = S.C.G = Short Circuit to Ground.
If i keep rev's high it don't backfire (above 5000rpm) and runs... well fast :)

Today i also notice first time ever that idle went up and down for a while.
never notice this symptom before.

but odd thing is that if it start to do that i just hit kill switch (while driving even) let it roll a bit then hit start and problem goes away?? and bike runs good again.
at least for while, sometimes full day.

second symptom is similar but instead of backfiring while driving it started to die suddenly. just pull clutch and it dies, again starting the bike there is no sign of problems!!


I first thought it was dirty fuel so i did empty gas tank and filled it up fresh fuel. still same thing.. (did not clean filter thinking it would replace bad with good later... )

when i removed tank i notice that after i removed fuel line from fuelpump it was still leaking gasoline.
Is this normal??
When i removed tank on my Yamaha FZ1 it did not let fuel out at all.