Carb-airbox boots won't stay on?

[longranger44]

Yes the plastic seems to dish in over time. Ive done this to every plastic box ive ever dealt with . Outer ones seat normally but two inside ones wont.

Yep exactly. It's really not a great design because there is zero support in the middle of this large plastic box. A couple of abutments in the middle would have prevented that, surprised the Japs didn't think of that they seem to think of everything else.

[chuck hahn]

Yes the plastic seems to dish in over time. Ive done this to every plastic box ive ever dealt with . Outer ones seat normally but two inside ones wont.

[longranger44]

Maybe this has been covered extensively here but thought I'd post. I noticed that the rubber boots that attach the air box to the rear of the carbs on my 82 gs750 wouldn't seat fully just from pushing the box forward. I could push them forward and try to tighten the clamps at the same time but they would inevitably slip back off. Took the air box out and noticed that the boots were not even, the two in the middle of the air box in particular were caved in. Detached them from the air box and it became obvious the plastic of air box was warped from age or heat or whatever.

So my solution was--stack some sockets/washers up inside the air box to spread the plastic until the holes are even and then heat up that wall of the air box with a heat gun to re-form the plastic. Here's a pic to illustrate what I did, figured I'd post it in case it might help someone out who has the same issue.