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**ken cool** · 09-01-2009, 07:41 PM

Help Topic Approved

**abhilashabhi12** · 09-01-2009, 07:56 PM

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..

**zayn** · 09-01-2009, 08:54 PM

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...

**desideep** · 09-01-2009, 08:55 PM

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...

**niks_devil666** · 09-02-2009, 08:23 AM

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?

**amandeepkamboj19** · 09-02-2009, 10:33 AM

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)

**amandeepkamboj19** · 09-02-2009, 11:08 AM

guys i found one more air filter
it is RE0260

**desideep** · 09-02-2009, 11:11 PM

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.

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

**amandeepkamboj19** · 09-03-2009, 10:26 AM

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

)

**Kush Kurkalang** · 05-16-2016, 05:02 PM

Re: K&amp;N for Royal Enfield Thunderbird

I've heard; Any bike goes faster if it breathes well and releases the gases efficiently. For this, one can buy a free flow air filter like K&N and swap it with the stock filter. Just fitting this air filter won't help. Get a good after market silencer to match the outflow of gases. You can also get the muffler of stock silencer removed to get the job done. This is the basic and cheap way to slightly increase the top speed and performance say by around 10%-15%.

If you have time and access to good mechanic, you can play with piston head-head gaskets- downing the barrels or even making custom pistons and can shafts to improve compression ratio. Doing these things really transforms the bike into a beast and I have seen some 350 REs reach the 150 km/h mark(GPS speed).

**Funrider** · 09-07-2016, 04:24 AM

Re: K&amp;N for Royal Enfield Thunderbird

Originally posted by Kush Kurkalang View Post

I've heard; Any bike goes faster if it breathes well and releases the gases efficiently. For this, one can buy a free flow air filter like K&N and swap it with the stock filter. Just fitting this air filter won't help. Get a good after market silencer to match the outflow of gases. You can also get the muffler of stock silencer removed to get the job done. This is the basic and cheap way to slightly increase the top speed and performance say by around 10%-15%.

If you have time and access to good mechanic, you can play with piston head-head gaskets- downing the barrels or even making custom pistons and can shafts to improve compression ratio. Doing these things really transforms the bike into a beast and I have seen some 350 REs reach the 150 km/h mark(GPS speed).

Hi Kush,
I too have seen a few 350 doing good 140KMPH, but would you like to elaborate a bit on this process of Piston-heat gasket play. because what they told me was that they have rebored the engine to 500 cc and using Piston and head of thunderbired 500.

**rugved** · 09-08-2016, 01:12 PM

Re: K&amp;N for Royal Enfield Thunderbird

Originally posted by Kush Kurkalang View Post

I've heard; Any bike goes faster if it breathes well and releases the gases efficiently. For this, one can buy a free flow air filter like K&N and swap it with the stock filter. Just fitting this air filter won't help. Get a good after market silencer to match the outflow of gases. You can also get the muffler of stock silencer removed to get the job done. This is the basic and cheap way to slightly increase the top speed and performance say by around 10%-15%.

If you have time and access to good mechanic, you can play with piston head-head gaskets- downing the barrels or even making custom pistons and can shafts to improve compression ratio. Doing these things really transforms the bike into a beast and I have seen some 350 REs reach the 150 km/h mark(GPS speed).

True, As long as the engine breathes IN and OUT without obstacles it will perform better.

But This is conditionally accurate info. The condition being, With the Increased Air Ingress, their should be proportionate hike in Fuel Ingress as well. If NOT, then you end up making the bike run on extremely Lean mixture and will actually loose out on performance.

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