i read somewhere that a stock engine can be upgraded to double its power so will try k&n air filter and best or max carb setting and free flow exhaust i thing that will increase power by 20 % what do say and if we will be manage to put 4 valves and forget piston, stainless stell crank rods etc then the r15 can lag behind of our fz's and after all fz engine is larger by 4cc. What do u say guys ?

well said dude....
but i dont think K&N air filter does much to the power output....
and the rest of the mods will turn out to be quite expensive or difficult....

Theoretically the power of a street spec engine can be increased by 50% only. Practically the figure stands out to be 30% due to all the losses involved.
P.S -This statement is true considering only modifications and not re-designing.

I'm interested in knowing where you got those figures from. And what losses are you referring to?

went for a ride today and on the way back i rode the fastest indian....amazing bar the fairing vibes and RVM's
but the p220 owner was happy with my FZ
he said it was really smooth at the top too and the low end is great and he also said its way better than what he read

i dont exactly know about the figures but the losses here being referred to are those which occurs mainly due to the following reasons....

1. air resistance which increases with the increase in speed.
2. frictional losses etc.
3. by modifying engine it is very difficult to get it back to the same level of optimization as none of us have the tools required for it...

Air resistance does increase with speed but it has nothing to do with increasing engine power.

Why would frictional losses increase with higher performance? After all, it is not necessary that any mechanical component be replaced or modified. In fact, a well modified engine can have lower frictional losses compared a standard engine.

The manufacturer optimises an engine for a given set of usage conditions. For the FZ, like all other Indian bikes, the optimisation is done for city usage. By modifying the engine, the performance characteristics may or may not change. But when it does change, it usually changes towards usage for race conditions. So it can be said that a well modified engine is optimised for a different usage other than for city riding.

I apolozise for giving you the exact figure of 50%. This is a theoritical observation only(50% is the majority of the resultant figures). In engine designing, the materials used and the specifiation of the parts of street spec engines decide this figure. Which I studied in engineering. This is neither a rule nor a principle.
The saying "nothing is impossible" also holds true in this case aswell.
The figure of 30%, is also a practical observation. Its not exactly 30%. but the observed results say that the power can be increased by a practical figure of 30%(approx). Again this is no rule. There are certain limitations which the engines have to face which results in losses.
Some of them are:
power lost through exhaust heat, power lost through water heating(water cooled engines), power lost through motor friction, etc.
If im required to explain these..i dont think this would be the right thread to discuss the same as this is the ownership thread.

This clarifies your statement.

I personally don't need an explanation and I agree that one would beyond the scope of this thread.

Hey Guys, been about 3 months now since I got my Fuzzy, just thought I'd share my impressions with you guys...

Some details about the bike -

• Name - Sway
• KM done - 3500
• Services - 3
• Falls/Crashes - 3/1
• Work done - Changed Fins, crash guard, handlebar, Instrument panel, etc.(Kharcha - 8.5 K)
• Accessories/Addons - Mesh Seat, Philips 55w bulb, some radium work
• Longest trip in a day - 360 KM
• Usually put in a couple of litres of ExtraPremium between every 10 Ltrs of regular fuel. Prefer IOL pumps.
• Avg Fuel efficiency - 37
• Max Efficiency - 45 (Had set it all the way for mileage)
• Lowest FE - 31
• Top Speed - 117 KMPH

Planning to change to semi-synth around 4500KM, and change the spark plugs to Iridium at the same time. No further mods planned.. May go in for a paint job later.


Went for FZ at the last moment after I had decided on the GS150R. Was my first bike and I was at ease after a couple of hours itself. The wide tyres really did give me a lot of confidence at start. Ran it in as best I could (just 2-3 bursts up to 7000 RPM during the run-in).

No mechanical issues till date. Had 4 trips of more than 300k in a day, very satisfied with the handling and performance. Shocks are very good too.

After the accident had a bit of drop in the top end but noticed that it was set for mileage. Haven't really been able to rip it after changing the setting but feel confident it'll go to 110 at least, which is more than enough for me. Runs very well at 65-75 KMPH which is my usual cruising speed. Love the initial pickup of the bike.

Sometimes, I wish I'd gone for ZMA or 220 for the higher power and topspeed but the thought never crosses my mind when on the bike itself...I really love riding around on her, its amazing fun and takes my mind off all my moh-maaya related issues :P. Plan to keep her around for a couple of years and then upgrade to a bigger, faster machine. But right now its the exact bike that fits my needs and does it with the style dials turned up to 11!!

Would rate her 9/10 any day!

great write up dude.. Matching very closely with my personal experience with my baby FZ.. Truly love this machine, especially while cruising on streets

Problem with rear tyre.

Hi Guys,

I am facing some problems with my rear tire. My bike has done 1600kms and everything was going good till last week, when I started feeling my bike's rear swaying and giving away at curves. When I checked the tire, it was around 24 PSI, so I inflated it to the recommended 32 PSI. But the next day, I discovered a screw lodged into my rear tire. ( I always wonder how they end up going straight in ! ). Took it to the service and they fixed the puncture. After that its been a wild ride. I feel the rear giving away every time I hit a curve. There's a consistent wobble when I go above 30. But funny thing is the tire hasnt lost pressure. Till monday it was steady at 32.That day morning again I found the tire to be less inflated, so i inflated it to 32 and took it to service. They kept it there for an hour and a half and could not find any air loss . today morning, its still at 31. And bingo, evening its back to 24. I dunno whats happening. It seems like it loses around 10 PSI in a few hours when it chooses to . Also I feel the wobble even if the tire is correctly inflated. Can anyone throw some light on what could be contributing to the wobble ?

I am planning to take it to service again tomorrow. Is there something specific I can ask them to check ?

^^ yup you have a slow leak somewhere. Overcharge tyre to about 45-50 psi and then get it checked. minute punctures that dont show up under normal pressure, can be found more easily when the tyre is overcharged.

Thanks jd666, will try it today.

hi guys,

can i switch to semi-synthetic on my fz16 as it completed 3.5k and also i need to change oil now and anyone here used shell vsx 4t.