Jerky at low rpm/gear when low fuel, fine on a full tank?

[Beefy]

Hey guys,

So today I've noticed that in 1at and 2nd, when coming off the throttle on lower gears (1st, 2nd) my Z feels "Jerky", a bit like gear backlash when i go from acceleration to over-run.

Filled up a full tank with V-Power today, it's like night and day. Much smoother and a lot more comfortable.

I'm thinking it's to do with fuel pressure or quality perhaps? Maybe fuel filter needs changing?

Any of you guys noticed this or am I going mad?

I was thinking of getting a Walbro, anyway. As I'm on 100K now.

Thanks

Beefy