hello guys...,

Today i was hunting the source of gulping sound, so i removed the seat under cowl and the bend pipe that connects the carb to filter and started inspecting the carb closely

Now i think the sound is not from the carb but from a tube that is connected to the air box (am not 100% sure)

am attaching the pics of the above mentioned tube,

i removed the tube from the air box, inspected it closely and confirmed the sound;

so Guys please help me to find out the tube name and its use

now i just Blocked the one end of the tube that connects the air box and found out a noticeable change,
= After Blocking the tube, bikes RPM increased sudddently from 1500 to 3000 and it was stabilized at that point

= i tuned the idealing screw and kept the RPM back to 1.5k and noticed that the RPM is constant But once accelerated it takes a lot of time to come down and the Gulping sound still persist

=i kept the bike for 5 minutes in ideal RPM and found that there is no Sudden stall of engine and NOW I FEEL SOME IMPROVEMENT IN BIKES CONDITION

=guys am really confused now and eagerly waiting for your replays.......

Ravi Bro, yes i have K&N RU0200 cylindrical FFF and i know that its Recommended to do up jetting after installing a FFF But where to do here i don't know any one who will do these things PROPERLY

Vineet, are you running on Free Flow Filter? I did not notice it. In that case, you need to do upjetting and proper tuning. These kind of problems come with all performance airfilters if you do not do upjetting and tuning.

With free flow filter, if you do not do upjetting, even if you tune for rich mixture, the bike will run on lean mixture (now your bike is running on more air and less fuel).

Hi Bro, i can do adjustment in airs crew but most of the time my preference was some experts,

free flow filter was installed before some 7,000 Km, even the problem persist with the stock filter

one thing i would like to know is if the mixture is lean,will the bike touches 140Kmph(speedo read)

Dude am seriously addicted to the K&N and Don't want to remove it i am really happy to go on with the up jetting But the Problem is there is no good Mech here, searching for one good mech to do upjetting but unfortunately i couldn't find one

last week During service mechanic informed me that the spark plug is in good condition and can be retained for another 2 or 3k

Throttle cables was changed before some 12000 kms and there after haven't did any checkups

AFAIK,you bike is running lean and the carb has to be tuned well to sort out this problem. First, you are running a free flow filter, next, you havent still tuned your bike's carb. Every time you open and clean the carb, the A/F screw has to be tuned for optimum mixture.

try a couple of things

1)What happens wen you use choke when the bike is idling ( use the choke slowly)
2) try tuning the bike your self. Play with different setting and check.
3) Chuck out the free flow filter and use a stock one or upjet for christ sake
4) check the plugs to find out whether the bike is really running lean
5) check whether the throttle has some free play.

Most importantly, can you really adjust the A/F screw ???

hi Bro,
In my case AFAIK, the problem can be due to
1.a faulty choke cable
2.a Damaged insulator
3.a malfunctioning TPS or Airscrew...

So i hope by this Tuesday will at least find out the core

What about your DIY work, Did you find anything wrong with the main fold ?

thanks dude for your valuable information's

@RAVI@17bhp= thank you Brother

Well, this sounds good. Vineet, you can get in touch with Mr. Hadi Hussain and see what he says.

Well well this needs some serious attention..

My 2 cents of advice from my little experience..

Head to Majestic Motors near Minerva Circle & get in touch with Mr. Hadi Hussain ( he is the service manager) this guy is very good & understands in & out of almost all HH bikes.

am now getting to the bottom of this and want to resolve it for sure.
Could the TPS be a reason behind the problem.
Was reading this TPS Switch, and could this be a solution to the problem.

Thank you brother for your information and support
no i don't have any worries right now and feel really good to know that there are many like you to help me. once again thank you brother...

Vineet, I too do not know the exact cause of your problem. What we can do is, list all the suggestions given by the experts here. Eliminate one by one by checking/rectifying them. Ultimately we definitely can find the solution for that.

You said the carb is cleaned and properly tuned. So it is not the problem. then as somebody suggested, hope you have checked for any breaks/leakages in air channles to the carb.

I found that, problem with choke and tight valves may cause the revving problem. You have not yet checked the choke, so try and rectify the choke. Still if the problem persists, just ask an expert mechanic to check for tight valves. Based on his inputs, we can go ahead further.

Do not worry, we can find a solution. Contact rockkyyy (aswin) from Banglore. Somewhere he mentioned that the service at millennium motors is very good. Next time, try this service center. We will see what we can do next. If the problem still persists, we can mail to Hero Honda main office and get things right.

Hi Ravi Brother first of all am Thanking to god for making your attention on my Problem

Brother sorry to say that i don't know anything about tappet sound and how to assess it,

Tight valve! so what should ido?

Am gonna change my choke cable soon, since the Part is not available here(Kerala) am Planning to change it from Bangalore

Brother i now Remember an issue that was happen before some Two years During the service, i told to adjust the air screw But mechanic informed me that the Air screw is jammed and could not be adjusted. later they extracted the screw and re threaded the carb after this every thing was fine,
Is there any relation with the above incident and my current problem

HI bro go on with your DIY work, Tomorrow Am leaving to Bangalore, will check the availability of parts out there,
That's the same problem which am Facing From past 1 year Bro, But this time am Planning to check Every little thing possible,
if you could borrow a friend's Karizma air screw and try to fit it on yours. If this solve the problem then you will have the solution

MY KArizma mods... is the one of the best thread that i had come across so far and the person who started the thread is Mr. Sankar who is a Brilliant Automobile Expert and AFAIK He lives in TVM, Kerala, i used to dream about my bike being inspected by him And i strongly Belive that with the help of someone like him,i can solve my problem i was a silent Reader of the thread and Many times i Tried Get an account in TEAM BHP but i couldn't
Even MR.sankar is a member of our XBHP but i think nowadays he is not active,
AFAIK Here in Xbhp There are many Experts and few of them helped me a lot but bringing Their suggestions into practice was a bit Difficult because of the poor Man and material availability
But you really makes me to wonder, saying that am not finding any good mechanics here to resolve this. Being in Capital, i think there will be a lot of Mechanics wwo can solve the problem and i hope you can find one soon

GOOD LUCK Bro

Vineet, do you have any tappet sounds? Another reason for your bike's behaving may be cause of tight valves. Also check choke cable if it is right.