Author Topic: Exhaust port sealing  (Read 8461 times)

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Offline 1989kawasaki

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Re: Exhaust port sealing
« Reply #15 on: May 17, 2011, 02:49:11 AM »
Sorry, didnt say it was still available, just stated that it was what we used anyone with this issue and wants to use a fix of this nature, could Google "Chamber Seal" and come up with compareable products. Just throwing out ideas.

the flyin hawiian said that, but anyways im sure there are other brands just like you said
bikes

1977 RD400
1989 CR250
1988 CR500
1978 Z50
2009 Harley super glide custom

Offline delphipro5

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Re: Exhaust port sealing
« Reply #16 on: May 17, 2011, 09:54:48 AM »
Another tip. If your not getting a good sealing surface. There may be other issues.
Here's one.

http://www.kxriders.com/forums/index.php/topic,7262.0.html

IS THIS OPTION STILL AVAILABLE BY ANYONE HERE? And what about just putting material back on by weld, then machining back to spec. Is that possible or are the sleeves the only way to do this???

Offline awak100

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Re: Exhaust port sealing
« Reply #17 on: June 07, 2012, 02:31:36 AM »
I'd say haveing a good flat seal against the copper washer/cylinder is very inportant.  If your pipe is bent or twisted a little it changes that seal, some times loosening all your mounts and letting your pipe hang by the springs, then adjusting mounts/sometimes bending tabs on pipe for proper fit. I start from the front and then work my way back. It does take time, but a good mechanic doesnt rush things. Even brand new pipes dont fit perfect, they need adjusted/bent for proper fit, mostly the exhaust tabs/mounts on pipe.

Offline Foxx4Beaver

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Re: Exhaust port sealing
« Reply #18 on: June 07, 2012, 04:47:27 AM »
I'd say haveing a good flat seal against the copper washer/cylinder is very inportant.  If your pipe is bent or twisted a little it changes that seal, some times loosening all your mounts and letting your pipe hang by the springs, then adjusting mounts/sometimes bending tabs on pipe for proper fit. I start from the front and then work my way back. It does take time, but a good mechanic doesnt rush things. Even brand new pipes dont fit perfect, they need adjusted/bent for proper fit, mostly the exhaust tabs/mounts on pipe.


Not sure which brand of pipes you're referring to,but I've been using Pro Circuit for just about 30 years,and FMF for 8 years....and I have never,never had to "bend" any "tab/mount" on any of them.Only loosen the rubber mount that attatches to the frame and to the pipe...and they fit and line up perfect,every time....never an issue....and I can assure you,that if I had bought more than two pipes that required "bending" of any kind...I would'nt buy them ever again,I'd just stick with stockers. Just my 2 cents.
« Last Edit: June 07, 2012, 09:19:33 AM by Foxx4Beaver »
Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline awak100

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Re: Exhaust port sealing
« Reply #19 on: June 08, 2012, 02:15:48 AM »
Well ok fox, I have had to bend tabs at times, both on pro circuit, and fmf, I havent given up on them there good pipes, My herd of k5's are not perfect, 86 87 88 89 92 94 99 02 and 04, But there all in pretty good shape.  I've installed pipes (mounts) and some times the bolt distance center to center (hole in dampner) is different, (mount hole in frame)  sometimes to short, sometimes to long.  and yes I've played with these K5's for quite a few years.  Thats how I've got a herd of them.  JUst because manufactures dont make things absolutely perfect, doesnt mean I give up on them.  I've bought after market sub frames, brand new and the ends were to fat, to go into the mounts on the frame, I had to grind them, and make them thinner to fit.  I just make it work, and most of the time better then factory.  Shoot I've been building exhaust mounts for years twice as strong and adjustable for manufacteries defects and crashes.  I've swaped sub frames from old style to new style, swings arms the same,wheels, rear brakes, front fork, small dia to large.  cylinders swaped back and forth.  old style to new style, new style to old style.   on on on on , Yes i've played with these old bikes, quite a few years.  I ride them even more though, usually 4 times a week.  tuesdays thursday sat sun.  All year long, winter to.  15 degrees is chilly on a 500, note might consider rejetting at those temps.  The bike gets pretty pingee at those temp.  I really dont sweat the small stuff like you do, I just make it work.  O did I forget to mention, I'm installing a 05 artic cat king cat 900 twin cylinder two stroke motor in a 200 k5 frame hillclimbing bike.  150hp stock.  Whole new drive train, with jack shafts.  Like I said I just make s**t work.  And work well.  I do not break down on my k5's, Where I ride its way up canyons.  It would take all day to walk out.  Here in Wyoming.  Yep ive played with these old bikes.  thanks

Offline awak100

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Re: Exhaust port sealing
« Reply #20 on: June 08, 2012, 02:25:30 AM »
Well ok then, your world is perfect mines not.  I still have to bend them at times, but I'm not going to give up on neither manufctures pro circuit nor fmf.  On any of my K5's 86 87 88 89 92 94 99 02 or 04.  I've played with them also.  And yes I've done alot of swaping around from old style bikes to newer style, more so on the 80's bikes, I just make stuff work and work right.  Thanks though.

Offline Foxx4Beaver

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Re: Exhaust port sealing
« Reply #21 on: June 08, 2012, 04:31:58 AM »
Well ok fox, I have had to bend tabs at times, both on pro circuit, and fmf, I havent given up on them there good pipes, My herd of k5's are not perfect, 86 87 88 89 92 94 99 02 and 04, But there all in pretty good shape.  I've installed pipes (mounts) and some times the bolt distance center to center (hole in dampner) is different, (mount hole in frame)  sometimes to short, sometimes to long.  and yes I've played with these K5's for quite a few years.  Thats how I've got a herd of them.  JUst because manufactures dont make things absolutely perfect, doesnt mean I give up on them.  I've bought after market sub frames, brand new and the ends were to fat, to go into the mounts on the frame, I had to grind them, and make them thinner to fit.  I just make it work, and most of the time better then factory.  Shoot I've been building exhaust mounts for years twice as strong and adjustable for manufacteries defects and crashes.  I've swaped sub frames from old style to new style, swings arms the same,wheels, rear brakes, front fork, small dia to large.  cylinders swaped back and forth.  old style to new style, new style to old style.   on on on on , Yes i've played with these old bikes, quite a few years.  I ride them even more though, usually 4 times a week.  tuesdays thursday sat sun.  All year long, winter to.  15 degrees is chilly on a 500, note might consider rejetting at those temps.  The bike gets pretty pingee at those temp.  I really dont sweat the small stuff like you do, I just make it work.  O did I forget to mention, I'm installing a 05 artic cat king cat 900 twin cylinder two stroke motor in a 200 k5 frame hillclimbing bike.  150hp stock.  Whole new drive train, with jack shafts.  Like I said I just make s**t work.  And work well.  I do not break down on my k5's, Where I ride its way up canyons.  It would take all day to walk out.  Here in Wyoming.  Yep ive played with these old bikes.  thanks

LOL....where did you get that I "sweat the small stuff"?......I was just stating I've never had any issues with fitting pipes.For some of us it's easy.Instead of making accusations....why don't you try expressing your opinions,instead of trying to force your beliefs on others.
Don't take this the wrong way,but I get the impression you're quite an angry person on the "inside"....maybe I'm wrong IDK :?
Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline awak100

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Re: Exhaust port sealing
« Reply #22 on: June 09, 2012, 01:20:46 AM »
I'm not making any accusations at all.  I've stated for me mounting a pipe can be a pain in the but.  For you its just bolting that brand new pipe on.  For me its bending exhaust mounts on pipe if nessecary.  If those mount are installed under a load, they dont last near as long.  Meaning if there crushed on one side and pulling on the other of the rubber part, your loading tension on that mount, and it wont last as long.  So its not just bolting the pipe up and here we go.  Most people do exactly that.  Alot of people have the welded mounts on frame broke off to.  K5's the one under the gas tank is the one that breaks the most that I've seen.  If done correctly the reward is not near as many broken mounts/broken mounts on frame. Like I stated I like Pro Circuit/FMF buuuut I buy the torque pipe and there quite a bit larger in diameter, than a stock pipe, that means they stick out quite a bit more. Even easier to bend if you lay the bike down.  As far as being angry not at all. I'm just stateing what takes place with K5's exhaust systems, and I have enough of them to finally figure them out.  Cheers to you fox just bolt the pipe up, call it good.

Offline Foxx4Beaver

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Re: Exhaust port sealing
« Reply #23 on: June 09, 2012, 04:21:38 AM »
Cheers to you fox just bolt the pipe up, call it good.


my 95 still has the original mounts,never broke one....and I can tell you it has some time on it,and has been on it's side more than once.I'm running the FMF woods pipe.I learned a little tip from one of the local experts' mechanics 20+ years ago when I used to break the mount under the tank on my old beater 86 CR250.Run a rubber washer between the dampener,and where the dampener bolts to the frame mount....red Loctite and torque to 8 foot lbs......I was skeptical when he told me this,BUT,I never broke an exhaust frame mount ever again.....and there was no bending required  :-o  
« Last Edit: June 09, 2012, 09:36:14 AM by Foxx4Beaver »
Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline awak100

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Re: Exhaust port sealing
« Reply #24 on: June 09, 2012, 10:54:15 AM »
ok you dont bend yours.   If mine need bent, because there not square or paralell or the right distance (short/long) I'll bent mine.  One thing I like about this site is you or I can take advice or leave it. Its pretty simple.