Re: K&N airfilters or Simota airfilters

An impression can lead to an inspiration As in my case... Started with a mere rc1060.. :P ended up with.. well almost everything

Re: K&N airfilters or Simota airfilters

Seriously bro. But how many people have the love and patience that "you" and "Juned bhai" have? That's simply phenomenal!

Re: K&N airfilters or Simota airfilters

& what about UNI Filters??
Uni Filter
I have heard that they are even better than both above mentioned Air Filters??

& also, do AFR ratio is automatically maintained by ECU in bikes having open loop FI also like in R15 or only in closed loop FI bikes like ZMR/CBR??

If I install an air filter in my ZMR, what all things I have to do along with it in a stock bike??

Re: K&N airfilters or Simota airfilters

Nothing else. The ECU handles upto 20% AFR variations.
Uni is like a foam based filter, unlike K&N/Simota. Ashwin is using it (on a ZMA though!)

Re: K&N airfilters or Simota airfilters

yup Uni is a foam based filter..but when we compare all options, which one is best for a ZMR??

Re: K&N airfilters or Simota airfilters

Stay stock! There are negligible gains bro. With SBKs, you may get 5 odd hp increase. Do the math!

Re: K&N airfilters or Simota airfilters


Exactly.. lets take an example of a child and a father..

child - any indian bike.. (2 year old Kid)
father - Busa.. (28 year old young dad)

Now.. given 2 balloons..

give one balloon to the child.. and give the other one to the father of the child..

ask them to blow air into the balloon..

now who will be able to blow in more air and fill up the balloon??

the father right?? and what will happen to the child?? he will run out of breathe and possible that he can have a cardiac arrest

what I am trying to say here is.. an Indian bike which is like a baby cannot gain very high power with these mods.. at max you might gain 1 to 3kmph more speed.. and a very minute notice in acceleration.. just to gain this negligible speed you are putting your bike's at risk.. no matter how costly the performance air filter is, they will never filter the tiny particles of dust... they are gonna go inside the carb/engine and reduce the engine life.. so if you care for your bike.. better avoid it..

now.. coming to the father.. since he can blow the balloon faster, he can fill the required air to inflate the balloon at max.. which means.. the busa is gonna gain more out of it..

Hope I made it a bit clear.. if confused.. forgive me

Re: K&N airfilters or Simota airfilters

Nice analogy, just one minor addition. Lets assume that performance filters ruin our bikes in about 40k kms or 2-3 years of usage. They'd ruin the Busa in the same time limit, but usually people don't ride their SBKs that much. If you read int'l SBK forums, people insist on stock filters. They only add pipes (exhaust), sliders etc as after market accessories, but not filters.

Re: K&N airfilters or Simota airfilters

Well, lets not forget.. Busa is also a machine.. except its a monster.. it will get affected no matter what if you change the stock air filter..

so even though the father is big and he can fill the air in the balloon.. lets not forget he is straining at the same time.. he will run out of breathe at one moment.. may not run out of breathe quickly like the child.. but at one point of time.. father will be exhausted... same with the bigger machines.. so better to stay with stock and not strain the engine..

Thats my theory.. and purely my opinion

Re: K&N airfilters or Simota airfilters

Well nice explanation regarding child and father theory but as u know most of the children are spoiled brats so they always do things which are not right ...In this case installing a performance filter...well its clear that more air intake leads to performance of the bike (may decrease the life of the bike in long run) but as I said spoiled brats never listen....now the issue is Filter installing in carb bikes need Jetting...can anyone explain what is to be done and what is the concept of it and a proper way to jetting the bike

Re: K&N airfilters or Simota airfilters

Jets are "pins" within a carb that let air/petrol in the combustion chamber. Stock jets are usually small (depends upon the bike) and designed as per the stock requirements.
Now, assume I have a P180. It has stock jets the size of 117.5. I fit in an after market filter and go about upjetting the carb. I'd need jets (or pins) larger than stock size of 117.5.

I may opt for a Karizma's jet. Its 125 in size. (I may still need a bigger jet for optimum AFR)
These are main jets I'm talking about. After plonking in the bigger jet, I set the AFR (Air Fuel Ratio). The mixture shouldn't be too lean or too rich. This is done by trial and error.

Hope this helps.

Re: K&N airfilters or Simota airfilters

Yeah.. I can see that.. well, the tuning after upjetting is the difficult part... and like Divya said.. its a trial and error to adjust the AFR (Air Fuel Ratio)

the bike has chances to run too lean or too rich which will affect the bike badly.. and its time consuming..

Re: K&N airfilters or Simota airfilters

Ok...I own Pulsar 220 and now I need to install K&N will the local mechanics will know abt the jetting part or I need to get some one who knows properly abt jetting...also how will I know if the mixture is too lean or too rich

Re: K&N airfilters or Simota airfilters

You're lucky. K&N has a dedicated air filter for P220 alone! Nothing else needed. Its plug and play.

[this is claimed by K&N, I've no experience with the above claim on a P220]

Re: K&N airfilters or Simota airfilters

U serious dude????...well then I need to check out feedbacks for this...