[4corsa]

I just installed a Termi system on my 749. Both midpipes are slightly askew where they join to the header pipe - maybe 5 to 8 degrees. I installed all new exhaust gaskets, but i'm definitely getting some leaks. How critical is this? How much does it affect performance? I mean i find it hard to believe bikes come from the factory with absolutely zero exhaust leaks. I can maybe adjust a tiny bit more, but doubtful it will get perfect alignment. Any experienced comments or suggestions are much appreciated.


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[Viper1]

Exhaust leaks are common really. Unless it's a sizable leak, you'll never notice it on the performance side. Use fourm-a-gasket, etc. where your pipes come together and that will seal the leaks. Put a little on the male pipe, slide it in and your done. They will be a pain to get apart if you ever decide to do that though .

 

[davy.j]

Ordinary bathroom silicone sealer is perfect for sealing the exhaust joints and is easy to get apart and the clear stuff is virtually invisible.

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[Shazaam]

I recommend Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, Part Number: 81878, for aftermarket exhaust system joints. Good to 700˚F intermittent. Available in auto parts stores.

http://www.permatex.com

Aftermarket pipes are not a precision fit and often they let in combustion air that, when mixed with unburned fuel, results in the fuel being burned in the muffler, causing backfires.

 

[4corsa]

Thanks very much guys!


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[4corsa]

Actually - following your link to Permatex, they now make a "Tailpipe and Muffler Sealent made for sealing joints and good up to 2000 degrees F. Item # 80335. Sounds like the solution.


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[4corsa]

Took apart the exhaust this weekend and applied the Permatex Muffler and Tailpipe sealant to all the joints - no more leaks!


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[SF84831]

Exhaust leaks are common really. Unless it's a sizable leak, you'll never notice it on the performance side. Use fourm-a-gasket, etc. where your pipes come together and that will seal the leaks. Put a little on the male pipe, slide it in and your done. They will be a pain to get apart if you ever decide to do that though .

I should be receiving my Shift Tech exhaust in the coming weeks and this sounds like something I should probably do during the install. How much is enough or too much? Do you apply like shower calk, thick and wipe the excess? Or a thin layer and hope it's a complete seal?


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[davy.j]

Like I said before, ordinary bathroom silicone does the job perfectly, no need to spend up on fancy big name products.
Just smear on enough to seal the joint and slide it together.

davy