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Thread: K&N for Royal Enfield Thunderbird

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    Rusted amandeepkamboj19's Avatar
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    Question K&N for Royal Enfield Thunderbird

    i am thinking forward to buy an air filter for my royal enfield thunderbird
    but i am very confused
    what should i do should i go for it or not
    i dont know if it will increase my bike's performance or not???

    So if anybody using K&N on RE please give me the feedback

    one thing more there are two models available for RE on is

    E0900

    this one can be fitted directly into air box

    and one is R1100

    this one is cone air filter and to install this one i have to take air box out


    please help me out
    should i go for it or not
    and if i do then which one
    Last edited by amandeepkamboj19; 09-02-2009 at 11:09 AM. Reason: found original pic or filter

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    Help Topic Approved
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    IMHO I wuldnt appreciate any of the RE bikes to be with K&N.. REs already run on Lean burn putting up K&N will make things worse..

    One of my frnds frnd has tried this on his 2004 Electra & got rid off Immediately after his very next long trip.

    even if U can try & Upjet but I am not sure till how far it can help U get performance..
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    Thumbs up

    keya aman bhai.....why to go for k&n a/f mast chalti hai apki RE-TB wase you know ki my piston ring is gone as per chintu bhai said but bhai serious improvement in pickup + cruise at 80 with no problem
    aman bhai go for R-1100=Rs2400 up-jetting to koi itne zaruri nahi hai...jet is bigger enough... & E0900-is for the car...& i think ki if you change spark plugs too that will be good...
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    Quote Originally Posted by abhilashabhi12 View Post
    IMHO I wuldnt appreciate any of the RE bikes to be with K&N.. REs already run on Lean burn putting up K&N will make things worse..

    One of my frnds frnd has tried this on his 2004 Electra & got rid off Immediately after his very next long trip.

    even if U can try & Upjet but I am not sure till how far it can help U get performance..
    i dont agree with that one...

    for Aman ... Go for the first option cause it will keep your filter away from Rainwater and all that and then you would not have to worry about some one nicking your filter from the bike. upjet if needed you have a AVL just try to increase the fuel in the mixture and see if you like it otherwise the OEM is always there...
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    Quote Originally Posted by desideep View Post
    i dont agree with that one...

    for Aman ... Go for the first option cause it will keep your filter away from Rainwater and all that and then you would not have to worry about some one nicking your filter from the bike. upjet if needed you have a AVL just try to increase the fuel in the mixture and see if you like it otherwise the OEM is always there...
    @DD : how much of performance boost can be be expected?
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    thanks for replying guys

    But i am still very confused

    As all of us know that K&N are free flow air filter.
    But i think stock air filter does have sufficient air flow rate

    There are many thinks to keep in mind before changing stock air filter because it is manufactured to work best all over the rpm range
    but free flow air filter works awesome on certain rpm range and worst on rest of it.


    So
    what i will be doing is
    i will check the air flow rate of my stock air filter and compare it with requirement of my engine

    i usually run my bike b/w 2000 t0 4000 rpm range


    my bike is 350cc

    so if i assume my bike runs on average at 3k rpm then

    flow rate for my bike should be

    350x3000=1050000cc/min

    now required air flow rate is 1.05 cubic meter per minute(without any resistance to air)

    now can any one tell me please what is air flow rate of stock air filter

    one thing more air filter for thunderbird and electra is same even though if they work at different rpm range(please correct me if i am wrong)

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    guys i found one more air filter
    it is RE0260

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    Quote Originally Posted by niks_devil666 View Post
    @DD : how much of performance boost can be be expected?
    Not any thing ground breaking but yes the initial pick would increase and the millage would aswell but the Bike would heat a little more

    But again you guys dont have to worry about the heating thing cause you both have AVL's

    oil flow is extreamly high in the AVL i know a guy in UK he is using the AVL oilpump on his pre 70 CAST IRON bored out to be a 600+ and he does not have a heating issue.

    been to the silverstone with him once and that thing i able to popwheelies even if i was not trying but thats a separate story.

    incase you want to sqeeze more to get more juice but less taste then go path of Upjetting. exact jet number could be answer by Prakhar here. he has tried it i think.

    Quote Originally Posted by amandeepkamboj19 View Post
    thanks for replying guys

    But i am still very confused

    As all of us know that K&N are free flow air filter.
    But i think stock air filter does have sufficient air flow rate

    There are many thinks to keep in mind before changing stock air filter because it is manufactured to work best all over the rpm range
    but free flow air filter works awesome on certain rpm range and worst on rest of it.


    So
    what i will be doing is
    i will check the air flow rate of my stock air filter and compare it with requirement of my engine

    i usually run my bike b/w 2000 t0 4000 rpm range


    my bike is 350cc

    so if i assume my bike runs on average at 3k rpm then

    flow rate for my bike should be

    350x3000=1050000cc/min

    now required air flow rate is 1.05 cubic meter per minute(without any resistance to air)

    now can any one tell me please what is air flow rate of stock air filter

    one thing more air filter for thunderbird and electra is same even though if they work at different rpm range(please correct me if i am wrong)
    thats too much of calculations bullets dont go by all this :P
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    Quote Originally Posted by desideep View Post
    Not any thing ground breaking but yes the initial pick would increase and the millage would aswell but the Bike would heat a little more

    thats too much of calculations bullets dont go by all this :P
    hhuuuummmm initial pickup will increase
    that i know but what about top speed

    and i always prefer technical way as far as engines are concerned
    cant help it bro( i am mechanical engg)

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