There’s an odd (unusual) mix of graphics there, so there’s maybe some history to it.
As far as I recall … 🙄
Upto and including ’91, the seatpost bolt was captive in the seat-tube – for ’92 onwards it was a separate clamp – so it’s later than ’91.
Black was an alternative paint option to the splatter pattern in ’91, and for ’92 it changed to black or one of several solid colours (depending on the model – The ’92 Cinder Cone was red).
Fade options come in in ’93.
The ‘Joe Murray’ sticker and the ‘K’ on the top of the seat-tube are related in age, and are ok to about ’95/96 when the logo changed (but the downtube ‘KONA’ isn’t tho’, and actually, doesn’t look like any Kona font that I recognize).
It’s wearing a mixture of stuff which has been upgraded as needed (or not!) over time, and I’m [finally] coming down to the frame being a 1994.
If it was mine, I’d put it back to fully rigid, SS it using whatever modern stuff you have to hand (or need to get) to make it work, and ride it around for the pleasure of it. They are great to see restored, but I dunno that I’d bother.
(I ride a fully rigid, SS ’92 Fire Mountain and it’s a great ride).