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| Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles |
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02-25-2009, 09:25 PM
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Motorized Bicycle Elite Member
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Join Date: Jan 2009
Location: Ohio
Posts: 130
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Exhaust Gasket Replacement?
One of the sides of my exhaust did not have the lock washer on it for some reason and came loose and blew the gasket. It now spits the hot oil on my leg at WOT. Anybody know where i can get just a replacement gasket material or make one? Have access to a CNC if thats at all a help.
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-Nick
"Those who conform, lose all ideas"
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02-25-2009, 09:46 PM
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Banned
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Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,727
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Re: Exhaust Gasket Replacement?
Quote:
Originally Posted by ...ladies
One of the sides of my exhaust did not have the lock washer on it for some reason and came loose and blew the gasket. It now spits the hot oil on my leg at WOT. Anybody know where i can get just a replacement gasket material or make one? Have access to a CNC if thats at all a help.
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Copper sheet .045-.060 thick...heat it with a propane torch to a dead-soft condition, Cherry red...EDIT, (easily pliable by hand). Make your gasket. Torque the header...run the engine up to normal temp...re-torque the header...DONE!
Jim
Last edited by Creative Engineering; 02-25-2009 at 09:50 PM.
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02-25-2009, 10:04 PM
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Motorized Bicycle Elite Member
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Join Date: Aug 2008
Location: nh
Posts: 419
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Re: Exhaust Gasket Replacement?
wow thats a pretty extreme way to make the smoke go down the pipe! if it were up to me i would stick any old thing in there. the tough cardboard on the back of note pads is an easy and sure way to go. tacky, but hey, i fix stuff with a sledgehammer. if it works it works.
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its only too fast if you cant stay on!
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02-25-2009, 10:23 PM
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Banned
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Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,727
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Re: Exhaust Gasket Replacement?
Quote:
Originally Posted by mechanickid
wow thats a pretty extreme way to make the smoke go down the pipe! if it were up to me i would stick any old thing in there. the tough cardboard on the back of note pads is an easy and sure way to go. tacky, but hey, i fix stuff with a sledgehammer. if it works it works.
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LOL...A few minutes with a punch kit, and a tin snip...I really wanted to make a Die & Punch set so that the gasket would be formed perfectly. I hear Ya'...a Heavy paper gasket will work fine too, as long as no whistlers get through. A small leak will burn through paper quick!
Jim
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02-25-2009, 10:27 PM
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Motorized Bicycle Elite Member
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Join Date: Aug 2008
Location: nh
Posts: 419
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Re: Exhaust Gasket Replacement?
sorry btw, i meant no disrespect.
true.
i actually dont have a gasket on mine right now. i just too darn excited to hear it run right again. :P
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its only too fast if you cant stay on!
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02-26-2009, 10:45 AM
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Motorized Bicycle Elite Member
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Join Date: Jun 2008
Location: memphis tn
Posts: 850
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Re: Exhaust Gasket Replacement?
I have had to replce the exhaust gasket several times. I also used the cardboard from the back of an old notebook. I wiped it down real good with 2 stroke oil and have not had one blow or leak on me yet. I just manage to tear them when I pull the muffler off causing me to have to make a new one.
This trick works good for those of us that don't have a well stocked shop.
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02-26-2009, 11:03 AM
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Motorized Bicycle Elite Member
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Join Date: Jun 2008
Location: Longmont, CO
Posts: 1,596
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Re: Exhaust Gasket Replacement?
I used the gasket material from the auto parts store...just the standard, not the heavy duty or anything. It blew pretty quick. High-temp RTV on both sides of the cardboard gasket will keep it from blowing. I ran probably 700mi with the gasket like that.
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02-26-2009, 12:17 PM
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Motorized Bicycle Senior Member
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Join Date: Feb 2009
Location: Wilmington Ohio
Posts: 62
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Re: Exhaust Gasket Replacement?
I used some hi-temp gasket material that came from an auto store. I've had the stuff for years. Use to use it for tractor manifolds. It's gray and is about the same thickness as the back of a notebook cardboard. It is very stiff and needs to be cut with an utility knife.
Hope this helps
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03-08-2009, 06:21 AM
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Motorized Bicycle Member
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Join Date: Oct 2008
Location: Australia
Posts: 48
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Re: Exhaust Gasket Replacement?
I use $2 dollar store superglue and glue seal the edges. Then i use a very thin layer of RTV Silicone red stuff . Have not changed it for 6months so work excellent!
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03-08-2009, 08:38 AM
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Motorized Bicycle Elite Member
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Join Date: Jan 2009
Location: Perth Australia
Posts: 193
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Re: Exhaust Gasket Replacement?
Mine blew 10 km from home, I just cleaned the surfaces back to bear metat and siliconed in place have traveled 200km since no probs thanks for the reminder to retorque the nuts
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