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**ken cool** · 08-02-2010, 01:07 PM

Help Approved

**Binoy** · 08-02-2010, 01:19 PM

Originally posted by Zamaan View Post

Hello moderators and other experienced members, I am Zamaan from Bangalore. I bought my Fz-S from Perfect Riders-Lalbagh Road and my mechanic is Matheen-Dodda Mavalli.

Its been three months since I have bought my yellow-black baby

I wanted to know if there is anything I can do to increase the perfomance and the sound. Mileage also should be considered.

Is installing a K&N okay ? Is anything else required like upjetting or something ? I was told upjetting is not really required with Yamaha engines as there is already enough fuel transmitted !

And wha best cosmetic modifications can I do ? My budget is a little less because I am a student and my pocket money is not enough(Hope dad sees this

) Lmao !

I don't find any noticeable improvement with K&N without upjetting, As you are conscious about the mileage part then stay away from upjetting.
As for FZ, i think the performance is pretty descent upto 80-85kph. after all FZ is not made for the top speed its a pretty descent street bike.
If you need some more top end speed try sprocketing.
If you don't find these things to be satisfied, try any engine mods like porting etc.

Just one friendly question - if you didn't find FZ's power to be satisfied then why did you go for FZ?

**pavanchirmade** · 08-02-2010, 02:35 PM

Upjetting is very important when opting for a free flow intake like K&N or Uni etc. When we install a free flow intake, more air is sucked in but the same amount of fuel is sent as before. This results in the mixture becoming lean. Lean mixture may provide you better fuel efficiency initially, but the after effects are worse. Lean mixture heats up the engine a lot. Excessive heating leads to engine seizures and/or valve damage. The money you'd save on fuel when you don't upjet will be far less than the money you'll have to shell out once the engine siezes!
So moral of the story: Always go for larger main jet when installing a free flow intake!

**Zamaan** · 08-03-2010, 09:10 PM

Originally posted by Binoy View Post

I don't find any noticeable improvement with K&N without upjetting, As you are conscious about the mileage part then stay away from upjetting.
As for FZ, i think the performance is pretty descent upto 80-85kph. after all FZ is not made for the top speed its a pretty descent street bike.
If you need some more top end speed try sprocketing.
If you don't find these things to be satisfied, try any engine mods like porting etc.

Just one friendly question - if you didn't find FZ's power to be satisfied then why did you go for FZ?

As I said, mileage is the worry and engine mods like porting will kill my mileage totally

Explain, sprocketing !

And the answer to your friendly question is :

I hate Karizma, Pulsar and any Indian bike and R15 was out of my budget so went for FZ, I am happy with the power on streets. But as you can see in the picture above I am a tourer ! You can see a P220 & R15 and you should know how they damned me with their bikes on the highway !

**pavanchirmade** · 08-03-2010, 11:14 PM

Ya but you can always ride alongside those activa guys! lol
Jokes apart, if goin free flow, upjet without fail.
Sprocketting is changing of the sprocket on the rear wheel or the drive shaft
There are 2 sprockets on our bike in the final drive. The front one is a smaller one and the rear is the larger one.
Changing the sprockets to different sizes changes the way your bike responds to changes in the throttle.
Larger sprocket upfront will lead to lower acceleration and higher top speed and vice versa.
Larger sprocket on the rear will give you more acceleration and lower top speed and vice versa.

**kinshuk.arya** · 08-04-2010, 12:37 AM

Originally posted by pavanchirmade View Post

Ya but you can always ride alongside those activa guys! lol
Jokes apart, if goin free flow, upjet without fail.
Sprocketting is changing of the sprocket on the rear wheel or the drive shaft
There are 2 sprockets on our bike in the final drive. The front one is a smaller one and the rear is the larger one.
Changing the sprockets to different sizes changes the way your bike responds to changes in the throttle.
Larger sprocket upfront will lead to lower acceleration and higher top speed and vice versa.
Larger sprocket on the rear will give you more acceleration and lower top speed and vice versa.

what will happen if we increase the size of both the sprockets???

**vineeth aredath** · 08-04-2010, 01:29 AM

Originally posted by kinshuk.arya View Post

what will happen if we increase the size of both the sprockets???

AFAIK increasing or decreasing the both sprocket size affect the final drive ratio according to the number of teeth added or removed in each side, usually adding one extra teeth in front sprocket is equal to adding 3 extra teeth in rear.

So if you add one teeth in each sprocket, the ratio will change in such a way that your acceleration will reduce and top end will increase
Correct me if am wrong

**Zamaan** · 08-04-2010, 08:29 PM

Oh dint know

But the mechanic says no need of all those modifications, just the K&N filter will increase both the performance and mileage ! Is he just trying to sell it to me, for a quick buck ?

**pavanchirmade** · 08-04-2010, 10:25 PM

K&N is worth a try. and for more top speed go for larger front sprocket and leave the rear one stock.

**Zamaan** · 08-06-2010, 05:47 PM

Okay man !

**RanjithMN** · 08-06-2010, 06:24 PM

Is there any recommended Jet Size for FZ with K&N?

**pavanchirmade** · 08-07-2010, 01:59 AM

Well i suggest you pull out the jet from your FZ and take it to the local spare part shop, ask for jets bigger than that one. Hold the jet in such a way that you can see light through the jet hole so that you can compare the hole sizes properly. Buy 3 jets each bigger than the other. Try all the three in increasing order of size and see the difference, if you experience power loss after using a larger jet, switch to a step smaller one...hope you get what I am trying to say here..the post got a little bit complicated.

**Abhi6** · 08-07-2010, 11:10 AM

Guyz...I just fit K&N filters for my Yamaha Fazer last week. Facing a lot of problems now...My mechanic tried jetting/tuning for a long time and he has put a Jet size of 112 at the moment, my stock jet size was 117.5 .I tried telling him many times to upjet and not down jet but hes not listening. hez telling each bike is different and stuff..now my bike is bad....i mean its stalling at 8k rpm in the 1st,2nd,3rd,4th gears and @ 5th gear, it stalls @ 7k rpm. . It goes upto 92Kmph in 4th gear and after i change to 5th, it goes only upto 96Kpmh...I don't know what to do.............! hELP!

**anirudh fz1** · 08-07-2010, 11:37 AM

Originally posted by Abhi6 View Post

Guyz...I just fit K&N filters for my Yamaha Fazer last week. Facing a lot of problems now...My mechanic tried jetting/tuning for a long time and he has put a Jet size of 112 at the moment, my stock jet size was 117.5 .I tried telling him many times to upjet and not down jet but hes not listening. hez telling each bike is different and stuff..now my bike is bad....i mean its stalling at 8k rpm in the 1st,2nd,3rd,4th gears and @ 5th gear, it stalls @ 7k rpm. . It goes upto 92Kmph in 4th gear and after i change to 5th, it goes only upto 96Kpmh...I don't know what to do.............! hELP!

most mechanics dont know what they are doing, k&n will only work if u have a full racing exaust, upgrade to r15 sprockets ,u will have more power than u require on the roads.

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