guys, the hole that i am talking about is not for draining oil/water etc.

checked few UG3's found only 2 holes one near brake paddle and another one was below the exhaust port at the end of silencer.
have you tried contacting BAL asking about the holes??
I think there wont be any issue with closing it.

ok plz see the attached pics of the hole i am talking about.--












guys please help...

^^ whoa, how the heck did that happen?

anyways..did you try to get it spot welded. They would just do a small weld on that particular spot only. But make sure the silencer is removed from the bike so the welder has proper view of the whole.

I used to do it in college just cos I had a fine hand with the welding equipment

see the image below. something like this

welding is one solution, in fact only solution, but my mechanic says that this hole is present in all pulsar silencers, only thing is it somehow got enlarged in my bike.

so if i totally close the hole, is it ok? and if its ok, what is the purpose of this hole? why has bajaj provided a hole? will there be any problem if i close it totally. should i first weld it close and then drill a hole of smaller dia.

does this hole has anything to do with back pressure / exhaustec / torque ??

what is the purpose of this hole.

well incase it's there on all pulsars, this one is different as it changes the exhaust note. You can check the same hole on any other pulsar from the same year. See if it has the same hole. And if they do then as you said, welding and then drilling it smaller woul dbe the final resolution

I think a leaking hole shouldn't be there in any case in any batch. Its not even on the exhaust, its in the way of the pipe.

--
@ Prince: See, I did use some M-Seal on my silencer, which is again, a temporary solution for my P180's stock silencer. But I never did get the stock level performance ever.
Things do improve notably if you fill the holes though, but again my silencer's leaked glasswools in the past so its hopeless.


My suggestion is that you go for a new Bajaj exhaust or better yet, wait 2-3 more days, and I'll post a Joelled P180 thread and let you know how it performs. It should help you make a good long term decision.

As of yesterday, the screw connecting rear brake lever to the RH step down was missing so had to get it made from an engineering shop. Today the mechanic hurt his hand, he says.
Third time lucky? I hope I can get my bike Joelled tomorrow.

Prince : I dont see the same hole in my bike's exhaust. Looks like some defect for sure. Check with A.S.S and check the new models during your visit.

I have never seen any holes on the silencer that high up. I would suggest, remove the silencer and get it closed by welding.

Before doing that, check your acceleration, fuel efficiency and all. After welding, check again. If no big difference then you are good to go. Though I doubt if they will be any negative impact by closing the hole. I don't think any manufacturer will use such a crude rudimentary method for back pressure and the like.

last sunday, i also went to welding shop, and the guy said- i can close this hole but your bike will misfire.

he may be correct or wrong, but atleast he knew that such a hole exists in pulsars.

i will try to check as many pulsars as i can, till then keep your suggestions flowing in.

edit: can you guys check your pulsars and report back, if such a hole exists.

How difficult is it to visit the ASC and ask them directly?

Why try hands on something which you are not knowledge about or have any prior experience.

3 pages on a topic in regards to exhaust hole.

The Particular hole near the Exhaust Manifold should not be there under any circumstance. There had been corrosion problem due to the immense heating and cooling effect in the presence of moisture,and this had lead to the problem..You can remove the bend pipe and exhaust assembly from the engine and get the welding done...Once removed ,check the inside of bend pipe for further corrosion. ,and tap the pipe lightly with a hammer , near the spot.If corrosion is more ,better to go for a new one.

today i checked a few other pulsars in my office parking, they also have a hole at the same location. only thing is my bike's hole has incresed in size somehow.

see, the main aim of this discussion is not - "how to close the hole"

BUT

"what is the purpose of this hole" & "is it ok to completely close it" ???



no buddy, as i mentioned above, i checked a few other pulsar 150/180's in parking lot, the hole is there on every bike.

what i will do is close the hole with welding and redrill with smaller dia bit.

BUT

• WHAT IS THE PURPOSE OF THIS HOLE ????

thanks Anant (Antz.bin) & Samarth (samarth 619) for actually visiting service centers and reporting back through SMS.

here is what they found out-

samarth visited a service center and found that there is a natural hole in all bikes in silencer header pipe near cylinder head. i think he checked P180 UG3.

Anant also visited a service center and asked about that hole but found out that nobody knew much about it.
further the service head told him that -apparently it is an exit for the dust if it happens to enter combustion chamber. otherwise this dust will eventually damage the exhausts internal parts and ruin it.
further he was informed that there is no harm even if the hole is closed completely. there will not be change in performance.
this is one of the many holes present in pulsar exhaust.

once again thanks guys for taking the pain to actually visit a service center and report back.

HOWEVER--

i don't think it is for dust. how will dust enter combustion chamber, through air filter ? and imagine dust passes through air-filter (which is very difficult) and manages to also pass through carbeurator and even if it goes to combustion chamber, it will burn and most probably be converted to ash and these small particles when comes out -- how can it damage exhaust.... man it will damage engine internal parts (block piston walls and other moving parts) much before exhaust and we should worry about dust damaging that instead of exhaust. very difficult to digest.

in my opinion, it has something to do with back pressure only.

experts please comment.

quite surprisingly nobody knows anything about these holes.

c'mon guys ..... bikers.... ????