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Thread: [Help]: Air filter queries for Yamaha Fz!

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    Addicted Zamaan's Avatar
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    Default [Help]: Air filter queries for Yamaha Fz!

    I Have a Yamaha Fzs, I have a friend who is a mechanic in Lalbagh road, Bangalore. He suggested me to add a K&N filter which would cost about 2k, and he said that BHP would increase !

    May I know how much of it will increase ? Is it worth installing ? Mileage will be affected for sure, but how much ?
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    What a K&N actually does is it takes in more air than a normal filter. To compensate this you also need to increase your fuel intake to the carburettor by upjetting. You will get some increase in power and a nice loud grunt but fuel efficiency will be reduced by 5-7 atleast. For FZ-S it would be RC-1060 model (RS.1800)
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    Sorry that I dint post in the correct section

    Anyways thanx for the help, really appreciate your advice and maybe I'll go for it once the service period from the showroom is completed
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    hi,,
    one of my frbd has installed a rc1060 in his fz and there is a increase in power but its not a great increaseast was no dr..and coming to mileage there is neither a increase nor a decrease its around 40-42
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    Quote Originally Posted by raman sriharsha View Post
    hi,,
    one of my frbd has installed a rc1060 in his fz and there is a increase in power but its not a great increaseast was no dr..and coming to mileage there is neither a increase nor a decrease its around 40-42
    40-42 ????? I get 36 exact !
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    Quote Originally Posted by DEvIl$ LAir View Post
    What a K&N actually does is it takes in more air than a normal filter. To compensate this you also need to increase your fuel intake to the carburettor by upjetting. You will get some increase in power and a nice loud grunt but fuel efficiency will be reduced by 5-7 atleast. For FZ-S it would be RC-1060 model (RS.1800)

    Exactly... @Topic starter also remember to do the upjetting when you put the K&N... otherwise the air fuel mixture will be lean and the engine starts to overheat which will cause extra heat over the piston head which in turn cause the piston rings to melt and finally the engine will seize...

    Note: for all cases the engine doesn't seize... there are lot of people who fits the K&N and does no upjetting and have no probs... my friend has a ZMA with a K&N without upjetting... i really hate to ride that bike... coz of the air fuel mixture is lean... the proper is to do upjetting... the mileage difference will be really high, atleast 5-8 i think...
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    Quote Originally Posted by Binoy View Post

    Exactly... @Topic starter also remember to do the upjetting when you put the K&N... otherwise the air fuel mixture will be lean and the engine starts to overheat which will cause extra heat over the piston head which in turn cause the piston rings to melt and finally the engine will seize...

    Note: for all cases the engine doesn't seize... there are lot of people who fits the K&N and does no upjetting and have no probs... my friend has a ZMA with a K&N without upjetting... i really hate to ride that bike... coz of the air fuel mixture is lean... the proper is to do upjetting... the mileage difference will be really high, atleast 5-8 i think...
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    Question K&N In Kolkata......??

    Where can I find K&N filter in Kolkata...? Also from where I should re-jet my Carbs..? I have a Yamaha FZ-S... Does Yamaha Factory Shop have some performance enhancing parts or etc....?? can somebody provide any Info??

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    Quote Originally Posted by Binoy View Post

    engine starts to overheat which will cause extra heat over the piston head which in turn cause the piston rings to melt and finally the engine will seize...
    Wow such doom n gloom

    Wouldn't the piston crown melt first, not the rings? Since the rings hold the pressure in whereas the piston (esp the crown) takes the initial hit of the explosion, heat, pressure. The piston is made (factory and forged) from aluminium, The rings are made from a much harder metal/s (alloy) than the piston, also the bore liner is made from a metal much harder than the aluminium piston.

    Aluminium has a lower melting point Vs the other metal in the combustion chamber so it makes sense first that the piston will melt (I've seen numerous pistons melt but rarely rings)

    I've got a K&N cone filter on my FZ-S (200cc engine kit) with aftermarket carb.

    In the OP's case, since you are riding almost 100km's I'd suggest leave it as stock/factory as possible. Don't bother chasing power upgrades as your fuel economy will suffer.

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