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[mike the bike]

Hi there,

I have noticed an exhaust gas leak where my exhaust pipe on my Bullet 500 joins at the cylinder head,can anyone advise on a fix,thanks ,Mike

[PeteF]

Yes Mike, take the pipe off and clean it and the exhaust port well. Then use ordinary bathroom sealant to bed it in as you replace the pipe. Unlikely I know but it does work.

[Gwilly]

Hi Mike, I assume you mean the classic engine with the slip fit pipe, not the bolt up flange with gasket.

I have tried the exhaust paste and to be honest with the vibration and expansion/contraction of the pipe it doesn't last more than a few hundred miles..
The best most of us have found is humble silicon, as in bathroom seal, or the more specialist high temp stuff at a price..

Clean the port and pipe outer and apply a thin smear to each.. reassemble and leave overnight to cure.. DO NOT be tempted to start engine and speed process,

It works, did mine over a year ago and still holding.... gwilly

[Paul M H]

Here is what's used by our contractors for fitting Exhaust manifolds and exhausts headders on our large diesels I managed to find a tube they left behind excellent stuff never burns off I don't know if you can buy it here anywhere around here.
Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker.

[Alan (Lancashire)]

yes you can use fancy silicone RTV , however the cheap bathroom stuff just as well.

you do not need to leave it overnight as it sets within 10 mins.

slap it on nice and thick , wipe surplus off with a damp cloth

[tsflyer]

I just had this same problem last week. I used the "fancy" Permatex Ultra Copper, as the bathroom caulk suggestion scared me a bit...I didn't think it would hold up to the heat? I guess it does, as it seems to be recommended by many. The Permatex isn't too expensive, about $7 USD for a small tube (which is re-usable and has many other gasket uses)...vs. $5 for a full tube of silicone caulk, which ends up getting thrown out due to drying out after some time. I also added the finned cooling ring at the same time, which also hides the orange bead of Permatex. Good Luck! Tim

[sofiaspin]

Thanks to the advice here I have resetted my wobbling exhaust pipe with bathroom sealant - much against the advice of my local mechanic. LOL