I am having trouble fitting the filters on my CJ360. It is a bit of a frankenstein bike : engine from a CJ360 (origin unknown), frame is a 1978 CJ250T. So far the only difference I found is the length of the drivechain. However, there were no filters with the bike when I bought it, and I got hold of CJ250 filters and boxes, year unknown. I have trouble fitting these boxes, and the rubber between carb and airbox really distorts when I force it to fit. Is there a difference in the construction of CJ250 filters between years? The frame and the airboxes are both from a CJ250, but the date for the airboxes is unknown. It really looks like the airfilters should be way further back than they are now, any clues I am missing?