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hound
08-03-2017, 9:00 PM
i have a new to me 79 flh that i just bought. Trying to knock out some of the basic maintnance on this thing. Anyway it has a pretty bad exhaust leak on the rear cylinder and I replaced the gaskets with these http://www.jpcycles.com/product/693-509?utm_term=%5B74947138210%3Aproduct_type_l1%3D%3 Dvehicles%2520%26%2520parts%26%2520product_type_l2 %3D%3Dland%2520vehicles%26%2520product_type_l3%3D% 3Dmot&siteid=NB_G_PLA&product_id=693-509&adpos=1o1&creative=42040109650&device=c&matchtype=&network=g&gclid=EAIaIQobChMI0sXmpMa81QIVjTqBCh3ySgmWEAQYASAB EgLbSfD_BwE

and it still leaks the same as it did before. The pipe is a cycle shack 2-1 and honestly it doesnt seem to fit all that well. It sucks down tight at the bolt and has a small gap that you couls fit a business card in opposite the bolt.

Are there better gaskets i can use to stop the leak or what do yall suggest. This is the exhaust that I have for now.

SamHain
08-04-2017, 4:46 AM
I'd adjust your rear bracket to get the fit better and I like to use red silicone, use those same gaskets with luck.

hound
08-04-2017, 5:51 AM
i thought the same thing but the exhaust is ridiculously close to the axle.

http://www.jamesgaskets.com/product/jgi-65834-98-x2/
What do yall think of adding these mesh gaskets over the top of the ones i have and if i use them should i use it just on the leaky rear or both cylinders

Tattooo
08-04-2017, 7:14 AM
Can you post some pics of your mounting bracket and a pic of the pipe at the head???

Blackbetty
08-04-2017, 8:16 AM
I never had luck with those.

Stacking the evo style mesh gasket works well, but if you have a bunch of gap I'd use these, as they're super thick and will crush to fit:

https://i.ebayimg.com/images/g/jYUAAOSwZjJU5l54/s-l500.jpg

I don't understand why people gob red silicone in exhaust ports.

http://www.ebay.com/itm/Copper-Exhaust-Gasket-66-84-Shovelhead-Pair-/162072569951?hash=item25bc47285f:g:jYUAAOSwZjJU5l5 4&vxp=mtr

SamHain
08-04-2017, 10:37 AM
I never had luck with those.

Stacking the evo style mesh gasket works well, but if you have a bunch of gap I'd use these, as they're super thick and will crush to fit:

https://i.ebayimg.com/images/g/jYUAAOSwZjJU5l54/s-l500.jpg

I don't understand why people gob red silicone in exhaust ports.

http://www.ebay.com/itm/Copper-Exhaust-Gasket-66-84-Shovelhead-Pair-/162072569951?hash=item25bc47285f:g:jYUAAOSwZjJU5l5 4&vxp=mtr

Well on bikes with no provision for exhaust gaskets it works, so it works otherwise. No gobs necessary, little bead, assemble, clean off all excess, let it dry 24 hours, can't see it other than a red gasket, wire brush cleans it off real easy on disassembly. I use sealant on damn near all gaskets, puttin shit together just to leak sucks.

hound
08-04-2017, 11:25 AM
Honestly I don't know how to posts pictures on this site

Tattooo
08-04-2017, 12:32 PM
Honestly I don't know how to posts pictures on this site


Not being a smart ass but you need to learn as it's damn hard to give advice by just someones description..

hound
08-05-2017, 6:44 AM
http://i781.photobucket.com/albums/yy100/jl1243/IMG_3367.jpg (http://s781.photobucket.com/user/jl1243/media/IMG_3367.jpg.html)

hound
08-05-2017, 6:45 AM
http://i781.photobucket.com/albums/yy100/jl1243/IMG_3365.jpg (http://s781.photobucket.com/user/jl1243/media/IMG_3365.jpg.html)
http://i781.photobucket.com/albums/yy100/jl1243/IMG_3358.jpg (http://s781.photobucket.com/user/jl1243/media/IMG_3358.jpg.html)

hound
08-05-2017, 6:46 AM
http://i781.photobucket.com/albums/yy100/jl1243/IMG_3359.jpg (http://s781.photobucket.com/user/jl1243/media/IMG_3359.jpg.html)

hound
08-05-2017, 6:53 AM
http://i781.photobucket.com/albums/yy100/jl1243/IMG_3371.jpg (http://s781.photobucket.com/user/jl1243/media/IMG_3371.jpg.html)

Tattooo
08-05-2017, 7:25 AM
Glad you figured out the pic deal that really helps...

It looks to me if you lower the rear of the pipe it will close up the gap at the head... That looks like a lot of your problem....Be sure and loosen the bolt at the head also... Are your pipes level to the bike??

Tattooo
08-05-2017, 7:28 AM
By the way post a pic of the exhaust port straight on not a downward shot so we can see the gap at the bottom of the flange.... And back up a little we don't need a close up... Thanks

SamHain
08-05-2017, 7:59 AM
Hell that looks like a better fit than any of mine.

Tattooo
08-05-2017, 10:38 AM
Hell that looks like a better fit than any of mine.

Yea the top looks just fine.... But if you look down the side it looks like it's flaring out..... I might be wrong so we shall see???

hsoj74
08-05-2017, 12:33 PM
Hell that looks like a better fit than any of mine.

I was thinking the same.

Tattooo
08-05-2017, 7:14 PM
I was thinking the same.

I understand you both... But how tight is it at the other end on your bikes???

SamHain
08-05-2017, 11:50 PM
The non bolt side is noticeably looser than the bolt side. It's really a terrible design.

Tattooo
08-06-2017, 7:39 AM
The non bolt side is noticeably looser than the bolt side. It's really a terrible design.

You got that shit right... That's why the lower clamp on the pipe is critical..... If you ever owned a Knucklehead you would understand even more...

hound
08-07-2017, 7:44 AM
http://i781.photobucket.com/albums/yy100/jl1243/IMG_3381.jpg (http://s781.photobucket.com/user/jl1243/media/IMG_3381.jpg.html)

http://i781.photobucket.com/albums/yy100/jl1243/IMG_3390.jpg (http://s781.photobucket.com/user/jl1243/media/IMG_3390.jpg.html)

this is the best i could do for the pic request. I ordered some of the wire mesh gaskets. Im thinking they will seal it up good. But do I use them on both cylinders or just the leaky one. Also I got some copper gasket silicon and may just put a little on it just because

chopperbob1313
08-15-2017, 11:59 AM
Loosen the bracket completely. Then try and snug the pipe to the port. If it looks flush, make a change to the mounting tab that does not pull the pipe in any way. It's a simple fix that worked for me.

Tattooo
08-15-2017, 2:47 PM
Loosen the bracket completely. Then try and snug the pipe to the port. If it looks flush, make a change to the mounting tab that does not pull the pipe in any way. It's a simple fix that worked for me.


Yep that's what I've been trying to get him to do for a while now...... I hope he comes back to give us an update....

hound
08-15-2017, 4:29 PM
I havent really messed with the bike much. I just got this bike and mostly just ridin it around town. It needs some work for sure. i want to ride it to this bike shop bike night that is this friday. After that I think im going to put it up on the lift for a while and start checking things off the list. I know it has some wiring issues, needs the carb taking apart and cleaned and inspected, brakes flushed, neck and swingarm bearings need serviced and needs some rust scrubin. It has a few oil leaks, one is a leaky head gasket on the rear cylinder.

I get what yall are sayin about the exhaust rear bracket, I will try to lift it as much as possible but really it looks like the back of the exhaust needs to go in toward the bike which is not going to happen because it is really close to the axle now. I have a set of the wire mesh crush gaskets to play with and some copper high temp silicon. If the front mates up just fine should I use the crush gaskets on the rear leaky port only or use them on both. I am going to use the silicon on both just because.

The bike was only ridden a few times in the last few years before I bought it.