Author Topic: James exhaust port gaskets.  (Read 467 times)

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Offline Bruno-Katz Fokkerpilot

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James exhaust port gaskets.
« on: May 22, 2020, 06:02:49 AM »
Was just wondering if anyone has used these James exhaust gaskets on an Evo motor and have any kind of advice or feedback on them?
The reason i ask is, over the years iv`e tried and tried to get the stock steel crusher type gaskets into the ports without damaging them. I can`t! Now iv`e watched every Youtube video on how to fit them cleanly and without messing them up. I guess i don`t have the required skill for such an undertaking  :cry:
So i bought a set of the James gaskets to try an eliminate the constant blow by i get with stock items.
Was thinking that maybe i need to fit two James gaskets per port for a better seal, they certainly seem more pliable and user friendly than the Harley ones.
Any advice or know how would be greatly appreciated.
Thanks yalls.
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Offline thumper 823

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Re: James exhaust port gaskets.
« Reply #1 on: May 22, 2020, 06:17:05 AM »
I am not sure how many vendors make the round copperish metal crushable one.
It works well and nothing to come apart and fray all over the place.
If you are working with advanced porting techniques I would use them.
The avg joe will never feel see the difference.
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Offline Bruno-Katz Fokkerpilot

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Re: James exhaust port gaskets.
« Reply #2 on: May 22, 2020, 08:44:32 AM »
These are not copperish, more like some kind of fiber but i believe they have steel steel in them. They are flat and very bendable.
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Offline Hossamania

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Re: James exhaust port gaskets.
« Reply #3 on: May 22, 2020, 11:34:09 AM »
Much like the flat SE gaskets. I've had good luck with them on aftermarket exhausts. One key is to wiggle the exhaust as it goes together and gets progressively tightened at all the fasteners including the mounts and clamps. Re-tighten the flange gaskets after the first ride. I've used them on stock exhaust as well. (SE, not James)
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Offline Bruno-Katz Fokkerpilot

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Re: James exhaust port gaskets.
« Reply #4 on: May 22, 2020, 11:55:24 AM »
Thanks Hoss,
so is one gasket per port ok or, is it a good idea to put two in each port ?  :scratch:
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Offline Burnout

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Re: James exhaust port gaskets.
« Reply #5 on: May 22, 2020, 03:14:42 PM »
I prefer the old beveled gaskets as they are less likely to get wadded up and obstruct flow.
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Offline thumper 823

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Re: James exhaust port gaskets.
« Reply #6 on: May 22, 2020, 04:28:50 PM »
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline Hossamania

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Re: James exhaust port gaskets.
« Reply #7 on: May 22, 2020, 04:40:23 PM »
Thanks Hoss,
so is one gasket per port ok or, is it a good idea to put two in each port ?  :scratch:

I've always gotten away with using just one.
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Offline Ohio HD

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Re: James exhaust port gaskets.
« Reply #8 on: May 22, 2020, 04:50:20 PM »
C9247 Cometic is a good fit and doesn't fold up like the thin SE style gaskets. These are about 0.250" thick. They seal well, and hold up well, and they don't block the port.


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Offline PoorUB

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Re: James exhaust port gaskets.
« Reply #9 on: May 22, 2020, 06:53:40 PM »
I prefer the old beveled gaskets as they are less likely to get wadded up and obstruct flow.

It depends on the pipe. Some have tapered ends, some are blunt.
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Offline Racepres

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Re: James exhaust port gaskets.
« Reply #10 on: May 22, 2020, 07:35:09 PM »
I prefer the old beveled gaskets as they are less likely to get wadded up and obstruct flow.

It depends on the pipe. Some have tapered ends, some are blunt.

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Offline jsachs1

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Re: James exhaust port gaskets.
« Reply #11 on: May 24, 2020, 02:33:14 PM »
C9247 Cometic is a good fit and doesn't fold up like the thin SE style gaskets. These are about 0.250" thick. They seal well, and hold up well, and they don't block the port.


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You will NEVER have a problem with these exhaust gaskets. The best bar none.  :up:
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Offline Buglet

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Re: James exhaust port gaskets.
« Reply #12 on: May 25, 2020, 10:40:58 AM »
   One thing I do is lube the port and gasket with a little grease, it makes it a lot easier to install them and make sure the port a clean. 

Offline Bruno-Katz Fokkerpilot

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Re: James exhaust port gaskets.
« Reply #13 on: June 01, 2020, 07:02:21 AM »
Well thanks everyone for the advice, these flat type fiber and steel gaskets work a treat, fitted them, rode for 50 miles, tightened them down again and absolutely perfect. No more blow by.  :scoot: :up:
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