+1 What Keith said
It sounds like You and I are at about the same stage with performance.
I have a K&N filter,no snorkel,AI removed,re-jet,1 shim on the carb needles,after market pipes
I just came back from a 400 Km ride yesterday.
I was thinking at times "This is GREAT!".Other times I was thinking,"If I had just a LITTLE more Oomph"
I got 18k per litre and if I want more"Oomph" I'd probably lose some mileage[kilometreage?]
[I think "Oomph" is the technical term,not sure]


Dinosaur.

"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland

"Don't let the bastards get you down". Kris Kristofferson

"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville