Avoid octane boosters and injector cleaners as much as possible. They do more harm than good.

Check this out.

@F.I.: Haha ya...i do enjoy fireworks as long as it wont burst my engine...i have seen that exhaust in person and fireworks too...i am going to get that alluminum exhaust by the end of this month/early next month..should be able to post a review then...

Ya that snorkel may be for carb ninjas..

Btw have anyone tried removing catcon from ninja??and where is it in ninja(sorry for the noob question)

i am planning to change the air filter along with the exhaust..so any inputs guys



@ n_aditya...IIRC you are a using a k&n filter....waiting for your inputs on the k&n

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Anyone using joels airfilter??

Yes, I am using the K&N stock replacement filter in my ninja. Have used it for over 3000 kms and the throttle response has improved quite a bit. Just dont expect a huge difference in power bump.

Initially with the stock foam filter the bike used to effortlessly touch 145-150kmph and then the climb was slightly slower. With the K&N, its slightly quicker and does 165kmph with ease after which the progress is slightly slow. Since i generally shift at 11k rpm and above, i used to get 25kmpl with the foam filter. After the K&N, the FE has dropped to 23kmpl.

But if i shift slightly earlier and dont redline in each gear the FE is as high as 27kmpl.

No significant difference with the K&N. Only a marginal bump. Please keep this in mind so you dont regret later. On the sound part, no major increase in the decibel level too. There is a more prominent whoosh sound after the K&N installation. Doesn't sound like those K&N'd activa's and dio's with a sore throat, if you ask me.

I'm yet to clean the filter so not sure if it has a lot of dirt in the filter element. Will post an update when i clean the filter, which will happen in a month or so.

Hope this helps.

thanks a lot..it helps ...i want to change the air filter along with full exhaust system..so thinking over k&n filter...regarding the sound i dont mind even if there is no change in sound with airfilter because i am going to get sound which is completely different from the stock....heard that cleaning of k&n filters is a bit difficult process..where did you source the k&n from??

I guess you are quite interested in tyga full exhaust system(saw your posts in nin.org)

i am expecting significant bump in the power with both the exhaust and airfilter change

Cleaning the K&N filter is not difficult at all.

See this for detailed instructions on cleaning the filter.

You would need the K&N cleaning kit. Details here.

List of dealers who stock K&N filters and cleaning kits (recharge kits) are here and here.

I sourced my K&N filter from the US. The cleaning kit, i had it earlier as i run a K&N in my car too.

I've dropped my plans for an exhaust (slip-on and full system) as i dont fancy the dirt bike'ish sound at high revv's.

Just want to let you know that some folks who got a slip-on were complaining that the low end torque was compromised and the bike felt sluggish at low revv's. You might want to get more info from them.

Also please be aware that a slip-on pipe will make your engine run lean quite a bit. Not sure if the full system will have the same effects.

reg: k&n this info helps lot...will checkout the simota(dont remember the name well,i remember it as joels filter:P)..
Reg: the full exhaust system:actually i am taking the full system from a friend of mine who have used it for 2k kms(hez now selling his ninja so..)..i drove his ninja once and observed that there is noticible increase of power in the lower end say the fun starts from 4k rpm or so unlike the stock one where the fun starts ~6k rpm..and even that guy confirmed it and a better top end also(not too much though)......and the sound thing is completely one's choice

Mate

Snorkel is just behind the air filter box. It is a hard rubber tube rectangular shape abt 2 inch x 1/2 inch.

It is attached to the filter box. You can just pull it hard and it comes out.

After you change the full exhaust system if you remove the snorkel, you will get a bassy note.

Catcon is in the stock exhaust. As you will be replacing the full system , that would go with it.

If you change just the air intake and exhaust your bike would run too lean.
You should increase the fuel to engine also to avoid damage to engine.

thanks for the clarification buddy...the dyno graph i saw claims that just by removing the snorkel there will be 2bhp gain(i highly doubt it!)..

Didnt get the last part"increase fuel to engine"..u mean i should change some stock settings of ecu :O..

When you change the intake and exhaust characteristics, such as adding a free flow exhaust (slip-on, full system) and a high flow air filter such as K&N, the AFR (air fuel ratio) changes causing the engine to run lean. This can damage the valves and other internals in the engine in the long run. Popping from the exhaust, misfiring etc. are indications that the engine is running lean.

Stock ECU's generally adapt to the new AFR values and compensate for the change by advancing the timing for detonation or combustion. But only to some extent. There is a limit to this and thats why people opt for power commanders or aftermarket ECU's to ensure optimum AFR values.

PC's are available for the ninja 250R and are commonly known as juice boxes.

I would recommend "Dynojet Power Commander V" as it is more customisable and along with its "Autotune" unit, if you are not under budget.

They should have rejet the carb (shim the needles) for that gain.

what about the post 8krpm? is the power increase noticeable during mid-high rpm range? can you clarify on the better top end please (increase in power and/or the top speed?). Now you've gone and done it harsha! i'm not interested in full exhaust system but i am interested in installing a power commander and k&n air intake! i'll research a bit to see if its worth installing power commander + air intake on the stock exhaust setup. if you happen to know then do share it here!

very helpful page this for prospective mods! keep this going as i'm learning many new aspects

You dont need a power commander if you are going only for a K&N air filter. You would need one if you install an exhaust system in addition to the intake modifications such as K&N.

^^ you are right indeed!

finished my research and i can now happily drop the idea of getting the pc and full system exhaust! i will be placing an order for k&n soon though...

to what extent can the stock ecu adapt??.can the ecu handle if change only exhaust system without changing to k&n..i dont think here in hyderabad there are tuners who can handle ecus...i think even if i get a powercommander i should keep on changing the maps to know which one suits me best...

according to my friend topend is 4 kmph more than the stock one(180-182) but ya there is noticeable increase in the mid end...i dont think there will be much increase in high-end as stock one has its power in high end...

Well well well....
Look who's on a mods spree !

@Harsha and Abhinav: Seems like I will have a tough time to catch up with you guys when we go on a ride together...