Hi Gents,
Just discovered that a air filter I brought for a PE175 82 model, uni filter part number nu 2435st is not if that model and the NU 2434st is the correct one.
The 82 to 84 PE175's share the same filters as RM250 1981-1983, RM465 1981-1982, RM500 1983-1984
Suzuki parts numbers 13781-14200 & 13786-14210, requires two of each.
The RM125 X,Z & D, have two different size filter housing making a left & right filter, four different part numbers for the complete set.
Right hand side 13781-14100 Inner filter or secondary( fine foam )
Left Hand side 13782-14100 Inner filter or secondary( fine foam )
Right hand side 13786-14100 Outer filter or secondary( course foam )
Left Hand side 13787-14100 Outer filter or secondary( course foam )
Or Uni filter NU 2435st.
Hope this info helps. not sure if the airbox assembles all share common mounting points and/or carby boot sizes. probably not as the 125s have a 32/34mm carbs and the 250s & opens classes have 36/38mm carbs.
Regards Gibbsy