What is this I keep reading about there being foam inside of the 600RR swing arm? Yes/No/Purpose?

I want to convert my F4 to the RR swing arm and plan to powder-coat it (and my frame). If there is foam inside the arm, then it will probably "burn out" when powder-coated. Anyone have experience with this?

Chris

 

I'm not sure if there is foam or not but my swing arm on my 05 600 RR is powder coated and I haven't had any issues.

 

Never heard of this.....

Subscribing.

 

I guess its possable from when they built the swingarm but I doubt it. Either way theres nowhere for it to melt and go since the swingarm is welded up so don't worry about it.

 

Swingarm Foam...how many degrees? : Honda CBR 600RR Sportbike Forum : 600RR.Net

Sounds like it isn't anything to worry about. One place stated the stuff doesn't even melt below 400degrees and since powder is put on at less than that, it shouldn't even melt. Another stated if foam does get hot it just "grows" and pops out the holes.

Chris

 

Interesting. I'd never heard of that.

 

Swingarms on the RR's do have foam inside them. It is up in the cast part towards the front of the bike. It can come out when powder coating but isn't a lot. T

 

who would have kow... I would assume that if it can withstand the swing arm being welded the powder coating wouldn't be that big of an issue

 

Makes sense for foam to be there. If it was solid metal it'd be heavy as chit. And if it were completely hollow there'd be all sorts or vibration and noises I'd think. So foam would make sense to absorb vibration

 

I believe the foam is like spray foam and it installed before the blind nuts are installed for the hugger. So after the cast part and the aluminum part are welded together they drill the 3 mounting holes spray in the foam, install the blind nuts and it's done. If the oven temp for powder coating is around 350 the foam will only soften and not flow. T