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I changed my rear diff fluid today on my 09 Burgman 400 & damaged the metal gasket for the swingarm cover. For those who've done this, have you had any cooling or other issue?
 

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By diff fluid do you mean final drive oil? Is the metal gasket for the swing arm cover the CVT cover and the large, thin metal gasket between the CVT cover and the transmission?

Unless you broke that thing in half, you should be able to still use it.

I believe that is the crank case cover gasket GASKET,CLUTCH C
11482-05H00

http://www.boulevardsuzuki.com/fiche_section_detail.asp?section=434523&category=Scooters&make=SUZUKI&year=2007&fveh=10158

#2 in that diagram. The swing arm holds the rear wheel on.
 

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That large flimsy metal gasket that goes on the CVT cover, i can't remember that last time i had one. It got mangled a couple years ago when I had it off, and i never put it back on since, have not noticed any issues.
 

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that little piece of annoyance is there as a barrier between the two bigger pieces for corrosion protection, some metals when they corrode bond together, we probably have someone here in the forum who can explain it better than me, I was just trained to make it not happen , something about dissimilar metals aneodes cathodes anions cations salt pepper sausage and onions stainless steel and heat my first 400 didn't have one, but I kept the gearbox open pretty frequently, no chance it was going to corrode together
 

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If you still have the pieces fairly intact, I'd flatten it back out and use some gasket sealant to attach it to one half permanently.

Chris
 

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that little piece of annoyance is there as a barrier between the two bigger pieces for corrosion protection, some metals when they corrode bond together, we probably have someone here in the forum who can explain it better than me, I was just trained to make it not happen , something about dissimilar metals aneodes cathodes anions cations salt pepper sausage and onions stainless steel and heat my first 400 didn't have one, but I kept the gearbox open pretty frequently, no chance it was going to corrode together
Couldn't of said it better myself, simple.....
 

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The cases are all the same metal...just alloy to alloy, and won't suffer any cathodic corrosion. But the gasket should be used to help seal the elements out of the transmission area as is being said. It won't seal properly without it. The gasket also acts as a spacer in some respects and without it you may be stressing your clutch shaft outer bearing neoprene seal where it goes into the outer case bearing. I don't know for sure because I haven't measured tolerances in there, but the gasket is approx 1.1mm thick (unused) but it could make a difference. If you haven't had any problems so far, that's good but may be a good idea to review that side of it. Just my take on it.
 
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