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Old 9th March 2008, 15:43   #1
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Question Hair from exhaust ??

Hi all,

I have noticed a large amount of 'hair' material coming out the back of my exhaust pipe (Pulsar 150 DTSi). Initially I thought someone must have stuffed in...but when I took it a authorised service centre, those guys pulled out almost 100 mts of that staff...they said the only option is to replace it or there will be a drop in the mileage......well the best part is it's now sounding like a racing bike .....

Can someone please confirm, if it's fine to leave the exhaust pipe like that or will it damage the engine, as I really don't care if the mileage drops, as I am more excited about the new roaring sound ......
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Old 9th March 2008, 16:21   #2
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It's the glasswool (or some other fiber) packing thats coming out through the pipe.
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Old 9th March 2008, 17:35   #3
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How old is the bike? You can try this website for solutions
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Old 9th March 2008, 17:44   #4
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How old is the bike ? I feel it's a faulty exhaust - get it replaced if under warranty else get a proper FFE done on the bike (you love the sound right?)

ps - have checked for any rats inside the exhaust ?
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Old 9th March 2008, 18:36   #5
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must be glass wool burnt with oil.. has the sound changed..cos if it does then it IS GLASSWOOL..just get them replaced !
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Old 9th March 2008, 19:09   #6
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It happens when the perforated pipe inside the muffler gets corroded & break; thus letting the glass fibers enter the pipe and it gets blown out with the gases.

@Sam & NC: His signature says it's a 2005 Pulsar.

So warranty is out of question.
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Old 9th March 2008, 19:16   #7
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Thanks for replying guys....

@Sam: hahahah I did thought someone must have played a prank on me by inserting someone's hair into it...anyways as I said its not hair but " 'hair' material "......

@normally_crazy: Well I bought it in March 2005 and the guy at the service centre told me the only issue I will have is drop in mileage...but anyways hope you know how good they are and hence I cam here for help....btw what does "proper FFE done" means...I am sorry if you feel it's a dumb question to ask...as you can see I am still a newbie over here

@headers: The sound did change, as it's sounding more like a racing bike...but the volume is a bit low....anyways the bajaj says I cannot replace "GLASSWOOL" but will have to replace the entire silencer......

So if you can confirm if it won't effect my bike's engine, then I would leave like that or would replace it with Proton or Tectrac.......please advice...
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Old 9th March 2008, 19:48   #8
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I believe he is more worried about causing excessive valve wear from the lack of back pressure in the silencer. Anybody know? My one GUESS is that it will not cause wear. My other guess is that his neighbors will assassinate him long before his valves wear out anyway.
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Old 9th March 2008, 20:13   #9
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No, why would it damage the engine?
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Old 9th March 2008, 20:34   #10
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An FFE is a Free Flow Exhaust. Its name explains what it does. It will sound like what your silencer in its current state does ( it is also acting as one , as the glass wool that was there before is gone, so the exhaust flow is less restricted. As you've been experiencing , an FFE will improve the power delivery and sound , but will reduce the mileage, and may not be legal

what he probably meant is that since your silencer is acting as a FFE by accident , and you like it, why not get a proper FFE

Last edited by greenhorn : 9th March 2008 at 20:36.
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Old 9th March 2008, 20:40   #11
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oh..k....thanks for making it more clear greenhorn cheers:....
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Old 9th March 2008, 21:36   #12
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Quote:
Originally Posted by v1p3r View Post
No, why would it damage the engine?
If its not re-jetted it might burn up the exhaust valve. Ask me how I know.
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Old 9th March 2008, 22:45   #13
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Quote:
Originally Posted by ananthkamath View Post
If its not re-jetted it might burn up the exhaust valve. Ask me how I know.
Explain madi ............ and this burnup will happen over a period of ?
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Old 9th March 2008, 23:14   #14
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Even i had faced the same situation before 4 months. Mine in is 2005 pulsar 180 dts-i . I saw some amount of glass wool coming out from the silencer., so i removed it completely. Changes after the removal .

1: Slight raise in exhaust note.
2 : Free revving engine, ( slight change only)
3 : Dip in economy 2kmpl to be precise
4 : Checked spark plugs, it reads a lean mix

I had slightly adjusted the Air- Fuel mix. i know i had to do some jetting before i fry my valves. I am planning to add K&N & 115 main jet.
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Old 10th March 2008, 00:19   #15
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Quote:
Originally Posted by black12rr View Post
Explain madi ............ and this burnup will happen over a period of ?
we ran a 1.25" ID header tube with a 1.5" ID end can. The can terminated much shorter than the original and was about 3" OD (very small). The carb wasnt rejetted. After about 2-2500 km there was a loss of compression and fuel economy. Upon opening the head the exhaust valve showed signs of leakage through uneven carbon deposits. If we hadn't replaced the valve and had the seat re-ground the valve might even have broken off.

Lesson: Dont make any changes to your exhaust unless the carb is re-tuned completely. And I dont mean just the main jet. Changing just the main jet won't save the exhaust valve.
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