Ah Yeah that's what I understand as the AS1 which is what I have. Can't read part number label on phone atm.
I'd bought a couple for my 500 twin some while back. Prices varied wildly even before the appearance of Chinese copies.
The AS2 of later models (like 2010ish and beyond) have a flat lid held on with 2 screws.
They seem to be a hybrid of the PWK and PWM models. Really not sure there is that much info available from doing a search.
I assume there are other changes internally but people run different jetting so there could be a difference further than port and pipe difference as the 2010 is close to the older bikes but they changed the barrel and still like the same needles.
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'07 EC300 GG
'14 TXT250 GG
'? 496 CPI Cheetah RZ/RGV hybrid
'22 765 Street Triple RS
'21 XTrainer
'69 Stinger T125 Suzuki
'23 TRS 250RR (it's a Trials thing)
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