Liar, Liar, Pants on Fire or How to Gut a Cat?

MauiSurfer · 05-24-2008, 03:31 AM

On my first several rides, I smelled something like canvas burning and wondered why some woman pulled up next to me and said, "Baby, you on fire!" I took it as a compliment until I noticed, sure enough, I WAS on fire.

My right Levi pant leg was noticeably shorter and now had a small ring of bright red encircling it. Wasting no time, I pulled over and put my pants out before they turned into shorts.

Later upon reflecting on the exact part of the exhaust nearest to my former pant leg I noticed, under the small ineffective heatshield, the pipe has a bulge! Is that a catalytic converter? Oh, jeese my little 80 mpg motorcycle has such a big carbon footprint, oh thank gawd big brother is taking care of us!

How can I rid my motorcycle of that? I want the next lady to tell me I'm on fire to mean something else but that may not happen on a Chinese motorcycle.

TeamCheap · 05-24-2008, 07:25 AM

Others have done that on this site but here are a few options

1)replace the header pipe with one free of the cat or
2)cut it out and weld in a piece of pipe or
3)cut it near the cat and gut it and reweld it

I'm so glad our bikes didnt have those....WHEW although I have noticed that about the time my bike is warmed up there is a small smog cloud hanging just overhead

When I'm faced with something like that I feel I might as well go ahead and try to mod it and if it doesnt work then replace it.

(essentially it is a broken part and you have nothing to lose by modding it)

ejcycles · 05-24-2008, 09:02 AM

Quote:

Is that a catalytic converter?

No it's not a catalytic converter, it's a sound/noise reducer. They are putting them on a lot of aftermarket head pipes now. Simply, it's a small glass pack muffler, as was put on some automobiles before the rear muffler to help reduce the sound. I have seen them on a few bikes. If yours got that hot I would suggest re-jetting your carburetor. Depending on the distance from the engines head that piece is, will determine if it's running rich or lean.

katoranger · 05-24-2008, 10:40 AM

Quote:

Originally Posted by ejcycles

Quote:

Is that a catalytic converter?

No it's not a catalytic converter, it's a sound/noise reducer. They are putting them on a lot of aftermarket head pipes now. Simply, it's a small glass pack muffler, as was put on some automobiles before the rear muffler to help reduce the sound. I have seen them on a few bikes. If yours got that hot I would suggest re-jetting your carburetor. Depending on the distance from the engines head that piece is, will determine if it's running rich or lean.

The truth is out.

Still is a restriction and if don't have welding access it would be cheaper to replace the head pipe.

Also as BRuce mentioned check your carb jetting. Was is your elevation?

Allen

AZ200cc · 05-24-2008, 11:12 AM

Cut that sucka out of there...Oh and Your carbon footprint goes up when You are releasing a toxic cloud of burning pants smoke

Dragon · 05-24-2008, 11:17 AM

It might actually not be a restriction. The "bulge" has increased diameter to compensate for the extra material. It's possible that the flow cross area of the "bulge" is the same as the rest of the pipe.

MauiSurfer · 05-24-2008, 09:52 PM

Thanks all for the helpful advice. Please go to my gallery and see the results of today's activities. You can see this is no sound deadener. I can't wait to see if I can keep my leg from burning. Yes, I did adjust the carb needle to the leanest notch a month ago but it still gets really hot going up the mountains here.

http://chinariders.net/gallery2/main...avId=xac11ae8c

VinceDrake · 05-24-2008, 09:56 PM

Ewww! Cat. Con! Yucky! Eww! Nasty! Make It Go Away!!!

ejcycles · 05-25-2008, 07:10 AM

!WOW! Yes gut it! I haven't ever seen one like that.

They should have just Stuck a Potato in the Muffler and put some small holes in it, that would have given the same effect!!!

DesertDog · 05-25-2008, 10:48 AM

some good ideas,
give a updated foto of it all slobbered back together

AZ200cc · 05-26-2008, 12:13 PM

That is one goofy setup....Looks like a bunch of bee's moved in and clogged it all up.

TeamCheap · 05-26-2008, 12:17 PM

choking off the engine so it wont run would cut down on the smog ....I guess. :roll:

I'm all for keeping things clean but small engines like these just seem ridiculous to mess with.

liverchip · 05-26-2008, 02:14 PM

Definately gut that monstrosity.

MauiSurfer · 06-03-2008, 01:10 PM

Gutting the cat was a big success. A few days ago my speedo read 70 for a short time and the engine is running cooler too.

05-24-2008, 03:31 AM	#1
MauiSurfer Join Date: Apr 2008 Posts: 15	Liar, Liar, Pants on Fire or How to Gut a Cat? On my first several rides, I smelled something like canvas burning and wondered why some woman pulled up next to me and said, "Baby, you on fire!" I took it as a compliment until I noticed, sure enough, I WAS on fire. My right Levi pant leg was noticeably shorter and now had a small ring of bright red encircling it. Wasting no time, I pulled over and put my pants out before they turned into shorts. Later upon reflecting on the exact part of the exhaust nearest to my former pant leg I noticed, under the small ineffective heatshield, the pipe has a bulge! Is that a catalytic converter? Oh, jeese my little 80 mpg motorcycle has such a big carbon footprint, oh thank gawd big brother is taking care of us! How can I rid my motorcycle of that? I want the next lady to tell me I'm on fire to mean something else but that may not happen on a Chinese motorcycle.
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05-24-2008, 11:12 AM	#5
AZ200cc Join Date: Apr 2007 Location: Show Low Arizona Posts: 2,889	Cut that sucka out of there...Oh and Your carbon footprint goes up when You are releasing a toxic cloud of burning pants smoke __________________ <br />2001 Suzuki DR200SE<br />1997 Suzuki RM250 YIKES<br />1995 Yamaha Breeze 125 daughters<br />1991 Honda XR80r Restored<br />maybe a 2003 Yamaha TTR90
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05-24-2008, 11:17 AM	#6
Dragon Join Date: Nov 2007 Location: Tejas Posts: 834	It might actually not be a restriction. The "bulge" has increased diameter to compensate for the extra material. It's possible that the flow cross area of the "bulge" is the same as the rest of the pipe. __________________ Chinabikeless
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05-24-2008, 09:52 PM	#7
MauiSurfer Join Date: Apr 2008 Posts: 15	CatGut - New photos added. http://chinariders.net/gallery2/m Thanks all for the helpful advice. Please go to my gallery and see the results of today's activities. You can see this is no sound deadener. I can't wait to see if I can keep my leg from burning. Yes, I did adjust the carb needle to the leanest notch a month ago but it still gets really hot going up the mountains here. http://chinariders.net/gallery2/main...avId=xac11ae8c
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05-24-2008, 09:56 PM	#8
VinceDrake Join Date: Nov 2007 Location: Southern Saskatchewan Posts: 491	Ewww! Cat. Con! Yucky! Eww! Nasty! Make It Go Away!!! __________________ "Sometimes it is better to say nothing, and let people think you're an idiot, than to open your mouth and prove it."
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05-24-2008, 07:25 AM	#2
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	Others have done that on this site but here are a few options 1)replace the header pipe with one free of the cat or 2)cut it out and weld in a piece of pipe or 3)cut it near the cat and gut it and reweld it I'm so glad our bikes didnt have those....WHEW although I have noticed that about the time my bike is warmed up there is a small smog cloud hanging just overhead When I'm faced with something like that I feel I might as well go ahead and try to mod it and if it doesnt work then replace it. (essentially it is a broken part and you have nothing to lose by modding it)
	0

05-25-2008, 07:10 AM	#9
ejcycles Join Date: Oct 2006 Location: 11481 State Route 44 Mantua, Ohio 44255 Posts: 1,112	!WOW! Yes gut it! I haven't ever seen one like that. They should have just Stuck a Potato in the Muffler and put some small holes in it, that would have given the same effect!!! __________________ Thanks, Bruce @ Endless Journey Cycles "Phone Calls Only" ~330-274-0098~ Hours: Tue.-Fri. 10:00-6:00 Sat. 10:00-4:00 EST. Dealer for: Lifan, Crossrunner ATVs. http://www.endlessjourneycycles.net
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05-25-2008, 10:48 AM	#10
DesertDog Join Date: Apr 2008 Posts: 782	some good ideas, give a updated foto of it all slobbered back together __________________ DesertDog
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05-26-2008, 12:13 PM	#11
AZ200cc Join Date: Apr 2007 Location: Show Low Arizona Posts: 2,889	That is one goofy setup....Looks like a bunch of bee's moved in and clogged it all up. __________________ <br />2001 Suzuki DR200SE<br />1997 Suzuki RM250 YIKES<br />1995 Yamaha Breeze 125 daughters<br />1991 Honda XR80r Restored<br />maybe a 2003 Yamaha TTR90
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05-26-2008, 12:17 PM	#12
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	choking off the engine so it wont run would cut down on the smog ....I guess. :roll: I'm all for keeping things clean but small engines like these just seem ridiculous to mess with.
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05-26-2008, 02:14 PM	#13
liverchip Join Date: Nov 2006 Location: Mystery Spot Posts: 1,223	Definately gut that monstrosity. __________________ 2009 XR650L Big Red Pig Tusk bar risers 2007 X-Moto(Jetmoto) GY250 --mods--- 15/40 sprockets UNI Pod Filter 2007 Shineray TMS 200XYi--Betsy Betsy Mods:______________________ Acerbis DHH headlight FMF Powercore pipe Uni Pod Filter
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06-03-2008, 01:10 PM	#14
MauiSurfer Join Date: Apr 2008 Posts: 15	Now it does 70 Gutting the cat was a big success. A few days ago my speedo read 70 for a short time and the engine is running cooler too.
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