Exhaust Rattle

[swazi_matt]

How long do the o-rings at the exhaust-engine connection normally last, mine seem to last a few rides and then the exhaust starts to rattle, especially as the idles drop (eg if i rev and then pull in the clutch)

I am using 44x3.0 viton o-rings, so i doubt they are melting and the last time i fitted the pipe i spent a long time making sure that it was fitting square (rattle got really bad this weekend when i banged the pipe on a rock, so i know it is not square anymore!)

[gasgasandrew]

us ktm green orings from a 05 ktm200exc only ones that lasts

[Jakobi]

They didn't last well on my 300. It vibed as you described. Always on decel.

I custom lower isolator mount. Nice big thick piece of rubber and a sturdy bolt. Much better than the tiny stock one which was flogged out. I also put new springs on which helped. And.. My last trick. Be generous with the high temp silicone. I give the inner lip of the pipe a nice big smear all the way around before pushing the pipe on. I'm 90% certain the lower mount was the issue though. Allowed the pipe to rotate a bit and cause vibes. Now it actually holds the pipe while absorbing the vibes.

[Stoby]

Custom mount? Couple pics please.
Thanks
Stoby

[Jakobi]

No pics at the moment, but a quick description. Basically I used a upper pipe mount that had broke. Used the rubber from that. Drilled a whole through the middle, slid a bolt through and used that as the isolator for the lower pipe. I'll get pics in the next few days. Its nothing flash. Just a bit beefier

[swazi_matt]

Thanks Jake. My lower mount is almost nonexistent, will have to see what I can find to replace it
Have also been thinking about using some gungum on the inside lip of the pipe