Costly and effective way of truly bumping performance figures.

The other day I was spending my evening at the garage of my family mechanic.There were many bikes standing awaiting repairs and service.I saw a Bajaj Discover air box,all open.I saw a new Bajaj Pulsar150 standing with its carburettor awaiting cleaning,some other bikes like Kinetic Challanger and LML Adreno were also out there along with the usual horde of Hero Honda Splendours,Pulsars and CBZs.

A thought crossed my mind,which were infact confirmed by the latest edition of Bike India.

The Bajaj Discover had air-filter tubes that connected the air box to the carburettor.I found that these tubes can be very well be used to get a KN air-filter connected to the carburettor effectively.The KN air-filter can very well be fitted in the air-box in this way.The latest edition of Bike India in the Technical section says that,fitting the KN in the air-box that can happen,it will give the desired performance benefits and also impart an awesome noice without even going for rejetting !!!! Also an air-box located air-filter is far better than something located outside.Air-filters if they are kept outside airbox,then they are exposed to elements like dust,heat and moisture,which clogs the filter pores quickly,causing harm to the performance as well as the engine.

The New Pulsar 150 on the otherhand uses a well developed 29mm UCD carburettor also known as Ucal Mikuni BS29 carb.As a result with the similar air flow to the engine,the power of Pulsar150 is now bumped up to 15.2PS or 15bhp.So how about buying the entire carburettor and plonking it on our Bike ??? It is gonna roughly around 3000bucks by my assumptions to buy the entire new carb.

I however am not even thinking of the exhaust,as I don't want to go beyond stock looks.

So if I combine the KN and the BS29,I would be basically looking at a GS150R pumping 16-17bhp with huge top speed and acceleration.

Our GS150r is already good at performance like the new Pulsar150 and covers it up.

So it just makes me think how a basic 5000 bucks is gonna boost the machine.It is costly I admit,but would promise some real performance and it would be safe.

Odd sound coming from my Bike

Hi Guys,,

I have only rode for 100 kms on my new bike. I am getting some sound after turning off the vehicle. I am not sure where the sound comes and it is not from the front disk break. The sound comes for 5 min after we turn off the engine. Some thing like tik-tik ..I am not sure if this is a regular thing with this bike..

It's no big issue bro, the tik tik sound is coming from catalytic converter. When you hear that sound, it means everything is working fine.

K&N flows more air..and also larger particles of dust.In the long run the engine and moving parts are likely to be affected.

I seriously doubt about that. The high flow filters are made such a way that the basic function of a filter is not compromised(filtering dust). Else whats the point of buying one.

Thats right but increased amount of air flow will increase the amount of dust particle also

In other word filter cleaning frequency is is shorter, you can even witness the same on engine oil (howfast it will becoming dusty )

My conclusion is if K & N increases the air flow then it increases the flow of dust to engine, at least 25 % increase in dust flow than the normal one.

Please follow the link and read the contents.
Debunking the K&N Myth - Why OEM is Better : Nissan Articles

air filter do you want speed or better filterging ablety you have to choose either 1

It is like if you want mileage forget high speed and fast acceleration.



In a similar way if you want a air filter that filters more dust then it cant throw more air to as its sophisticated filter elements will block the air intake speed,


Most of the K & N filters are made and designed towards fast intake of air, increase in air intake speed will increase the quantity of dust also.


Example :
If one kg air is having 100grams of dust
And if Normal air filter intake speed is 100grams air per minute means after filtering their would be around 5 grams of dust going to engine.

In a similar assumption if the K & N air filter speed of air intake is 5 times more than that of normal air filter means the dust quantity goes in also would be 5 times more

approx of 25 grams

bike external appearance maintainance tips

the below has tips/procedure for paint protection(may be most of you already know these)

Meguiar's India

Thanks for the link bro, I spent around an hour to read and reach a conclusion. The results published on the site were just opposite to what I had in my mind before going through it. But its not that unbelievable, the article appeared to be genuine and the whole test was carried on diesel engine air filters.

Let me explain the details in a simple way. The test was carried under controlled conditions following ISO 5011 conditions.

The parameters used were

1. Flow restriction/Initial restriction - Resistance of filter to air flow measured in "inches of water(IN-H2O)"
2. Accumulative Capacity - The amount of dirt retained by the Filter measured in grams.
3. Accumulative Gain - The amount of dirt passed by Filter measured in grams.
4. Filtering Efficiency - The filter's overall ability to capture dirt.

As K&N is the most famous air filter lets focus on it,

• It had the least restriction to air flow
• The dirt trapped was comparatively less to others and it clogged faster than others.
• The dirt passed was on a high side
• Finally the filtering efficiency was also low

I can't say for sure if this source of information is correct or not, but it seemed well explained and genuine. The experiment compared many air filters of same type and not with a stock filter.

So still a vital information is missing even though K&N seemed to look bad in front of some filters, its still not clear how it match up with a stock filter.

My conclusion is that K&N had least restriction to the air flow, it can do better in a racing environment where only speed matters but in normal riding conditions its better to have a stock air filter.

Thank you for taking the time to go through the post and reading it IN FULL. All the filters tested are after market with a combination of Oiled and paper pulp based..just like Most OEM are.The point I had tried to drive home had been clearly explained by you in the last paragraph...
Thanks once again for the effort and clarity in your summing up.

false reserve

I too today faced false reserve, since i've heard about this issue, i just continued my ride without turning the knob to reserve. after few metres engine became normal.
Why this false reserve ? any technical explanation is welcome.

After how many KMS did you hit reserve???

I have faced it many a times, but i hit reserve within 2-3 KMS. When i take a flyover when nearing the reserve, the position of the bike tilts backwards and feels like you've hit reserve and it gets normal when you are going back down.

K&N

Anup have you ever wondered why Professional Race teams of Yamaha,Ducati,Honda,Aprillia never use K&N ? Neither do Ferrari,Williams Honda,Renault,or McLaren Mercedes.....

dinesh, thanks for quick response
after i faced false reserve i hardly rode 2-3 kmts, came to office, and now at office only. let me see how far she pulls. ya..the elevation in the road may be the reason i think, as you have told