Some of the brass threads on the air filter box are shreaded. I guess I´m not the first one to experience this. What solutions could be done regarding this?

The brass material is so thin I dont think i can either thread it a larger dimension or insert heli-coil. Only way with heli-coil would be to drill the brass away and put it in the plastic which i doubt will last long. Could try to do it in another piece of plastic and test the strength.

It would be nice if one could buy something made for this, some sort of insert with better threads but I don´t know if that exists.

Any ideas, what has been done before that works except buying a new air filter box?

Does anyone know what type of brass thing is used when they manufacture it and how it is inserted?

Some of the brass threads on the air filter box are shreaded. I guess I´m not the first one to experience this. What solutions could be done regarding this?

The brass material is so thin I dont think i can either thread it a larger dimension or insert heli-coil. Only way with heli-coil would be to drill the brass away and put it in the plastic which i doubt will last long. Could try to do it in another piece of plastic and test the strength.

It would be nice if one could buy something made for this, some sort of insert with better threads but I don´t know if that exists.

Any ideas, what has been done before that works except buying a new air filter box?

Does anyone know what type of brass thing is used when they manufacture it and how it is inserted?

what you are thinking of is a rivet nut its a thread inserted like a rivet some body work shop garage or poss coach builders may have them or fabrication off road 4x4 specialist

You could look at this - it may help

Also, you may be better getting the aluminium alloy rivnuts - they pull in more easily than the steel or stainless steel ones.

Edit*** maybe use thin washers either side of the rivnut to 'repair' the hole...? Edit***

Good luck!

Edited July 20, 201214 yr by stecks

easiest way to fix is go to a proper motorcycle shop and get Screen to fairing rubber inserts, drill out airbox push in hole and screw up.

easiest way to fix is go to a proper motorcycle shop and get Screen to fairing rubber inserts, drill out airbox push in hole and screw up.

What a blooming good idea for a repair. Water tight and I've a couple of them knocking about so can repair my bike now.

You could always fit Dzus fastners? Fiddly to fit but good long term to use.

I would think very carefully before drilling through to the inside of an air box. If you do make sure whatever you have on the inside won't fit through your reed block. Nuts and other thingies don't mix well with two stroke ports and pistons.

Cheers

Fixed this a long time ago now, but wanted to let you know how it went.

I bought a kit with heli-coil and tried it out, the remaining brass after drilling was very thin but it worked out really good.

Have you considered tapping the screw holes out to the next larger thread size? There should be enough material to tap the screw holes from 4mm to 5mm or 5mm to 6mm. Don't remember what size they are?

I just read the last post. I discovered you fixed it. Disregard my post.

Edited November 20, 201213 yr by liviob