Motorized Bicycle: Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle: Engine Kit Forum > Motorized Bicycle > Motorized Bicycle General Discussion

Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles

Reply
 
Thread Tools Display Modes
  #1  
Old 02-25-2009, 09:25 PM
...ladies's Avatar
...ladies ...ladies is offline
Motorized Bicycle Elite Member
 
Join Date: Jan 2009
Location: Ohio
Posts: 130
Default 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.
__________________
-Nick
"Those who conform, lose all ideas"
Reply With Quote
Sponsored Links
  #2  
Old 02-25-2009, 09:46 PM
Creative Engineering Creative Engineering is offline
Banned
 
Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,727
Default Re: Exhaust Gasket Replacement?

Quote:
Originally Posted by ...ladies View Post
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.
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.
Reply With Quote
  #3  
Old 02-25-2009, 10:04 PM
mechanickid's Avatar
mechanickid mechanickid is offline
Motorized Bicycle Elite Member
 
Join Date: Aug 2008
Location: nh
Posts: 419
Default 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.
__________________
its only too fast if you cant stay on!
Reply With Quote
  #4  
Old 02-25-2009, 10:23 PM
Creative Engineering Creative Engineering is offline
Banned
 
Join Date: Sep 2008
Location: Clearwater, FL
Posts: 1,727
Default Re: Exhaust Gasket Replacement?

Quote:
Originally Posted by mechanickid View Post
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.
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
Reply With Quote
  #5  
Old 02-25-2009, 10:27 PM
mechanickid's Avatar
mechanickid mechanickid is offline
Motorized Bicycle Elite Member
 
Join Date: Aug 2008
Location: nh
Posts: 419
Default 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
__________________
its only too fast if you cant stay on!
Reply With Quote
  #6  
Old 02-26-2009, 10:45 AM
NunyaBidness's Avatar
NunyaBidness NunyaBidness is offline
Motorized Bicycle Elite Member
 
Join Date: Jun 2008
Location: memphis tn
Posts: 850
Default 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.
__________________
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." - Thomas Jefferson
Reply With Quote
  #7  
Old 02-26-2009, 11:03 AM
jasonh's Avatar
jasonh jasonh is offline
Motorized Bicycle Elite Member
 
Join Date: Jun 2008
Location: Longmont, CO
Posts: 1,596
Default 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.
Reply With Quote
  #8  
Old 02-26-2009, 12:17 PM
oldcliff oldcliff is offline
Motorized Bicycle Senior Member
 
Join Date: Feb 2009
Location: Wilmington Ohio
Posts: 62
Default 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
Reply With Quote
  #9  
Old 03-08-2009, 06:21 AM
saolom saolom is offline
Motorized Bicycle Member
 
Join Date: Oct 2008
Location: Australia
Posts: 48
Default 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!
Reply With Quote
  #10  
Old 03-08-2009, 08:38 AM
oylavabeer oylavabeer is offline
Motorized Bicycle Elite Member
 
Join Date: Jan 2009
Location: Perth Australia
Posts: 193
Default 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
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 09:24 PM.


Sponsors

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2012, vBulletin Solutions, Inc.
Motorized Bicycle Engine Kit Forum