1985 GS450L carb and airbox questions

[SkyfangR]

anyone know the STOCK jet size on this bike/carb?

for that matter, what kind of carbs are they, like a model number or something?

my stock airbox only has a metal mesh screen in it, no foam or paper filter. i can find filters no problem, but the holder isnt in there either, and i cannot find one of those. is it possible to just put a filter in there without the holder, or is there some way i can adapt or make a holder?

[boxcarbobby]

http://members.dslextreme.com/users/bikecliff/

There is a ton of service and owners manuals there. Im no expert on anything, literally know almost nothing about motorcycles other than what ive learned in the past few months from here working on my gs450, but I do know you can find the jet sizes there.
And the carbs are the Mikuni bs34's

[LAB3]

If you follow this link you can find the jet sizes listed and what parts you need to make the airbox complete, ebay is your best bet on those.

https://www.babbittsonline.com/oemparts/l/suz/50d3f25bf8700230d8b4be09/1985-gs450l-parts