exhaust orings

[sfcpiet]

Very surprised to hear of so much grief with exhaust gaskets. I've recycled mine for years and have never had a leak from either std twin headers, factory 2/1 or aftermarket 2/1. They crush down, go black ... and thin, but always seal. The brass nuts always stay tight as well. Maybe different motors have different expansion rates - and small valve 750s have a different spigot to the later 750s.

I rarely come across problems concerning the stock header gaskets.  Usually because the cross-over silencer has been omitted on the twins and the header/silencer assembly is free to swing in the breeze, no gasket of any kind will stand that sort of punishment for long. 

I do not re-cycle them, always fit new ones and tighten up after the first couple of heat cycles.

But hell, what do I know... :

piet

 

[Reggie3cl]

I used some Loctite 5920 copper/silicon sealant this time- has worked a treat (thought it would burn out with the heat but the headers are still firmly attached)  but would be better with the copper crush rings rather than the spiral gaskets I have in at the moment.  Gonna quiz Keith on the drip thing this evening anyway.

 

[Simonr501]

I used some Loctite 5920 copper/silicon sealant this time- has worked a treat (thought it would burn out with the heat but the headers are still firmly attached)  but would be better with the copper crush rings rather than the spiral gaskets I have in at the moment. 

I use similar stuff - Loctite 5926 (Blue Gasket).
Doesn't burn and stays flexible, cheap as chips and recommended by Keefy.

As for re-using old gaskets, I have done it in the past with good results.
You are rolling the dice though as technically it ceases to become a seal and transforms into a bush once compressed 

 

[Gerald]

For sure fit are header gaskets for the Honda CB450 S (PC17) 1986-1990 on stock 3CL headers.


HTH
Gerald