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Buddy, Calculating Top speeds is a complicated matter due to the following reasons:

1. Speedometers are not always accurate. 116 kmph on speedo maybe 108 kmph in reality, and the better equipped sites and journalists will try to calculate real speeds, like BS Motoring, Zigwheels, etc.

For an exception, Karizma ZMR does have an accurate speedo sensor, and it displays 127 kmph while its really 126.xx kmph, while older Karizma R used to display 140 kmph when its real speed is 125-127 kmph.


2. Even after all this speedo error talk, tested top speeds are affected by headwinds, tailwinds, road conditions, bike condition, road length available, rider skill, etc. I've been seeing this industry for 6 years now, and believe me, different top speeds achieved by different people is nothing new here.

Still, in Indian market I believe, Duke 200's top speed is the least complicated to calculate because it touches rev limiter in the top gear in most conditions, which gives it around 136-138 kmph real top speed, which can't be exceeded unless the ECU or gearing is modified. But other Indian bikes (in stock condition) don't touch rev limiters in top gears.


Am I clear with my text, or do you have any more doubts?

based on the reviews for which you have provided the links, my guess is its top speed is between 105 to 115 kmph, depending on conditions like rider weight, other load on bike, wind speed and direction, road incline decline flat etc. moreover not every FZ-16 will have same top speed. it will vary.

earlier i too used to wonder these things, as max. speed of my P150 as written in service manual is 120 KMPH, but i was never able to achieve that. then i read it carefully and it said, with 68 kg rider and further mentioned that 15% variation is allowed due to manufacturing tolerances and blah blah. so normally my bike does a top speed of 105-107 kmph and on a favourable day, it does around 114 kmph. so it is fine.

so as long as your bike's top speed is between 107-115 kmph it should be fine.

I gifted a Fazer to my inlaw, in which I have done 121 at max and 118 almost on every ride. If you have favorable wind drag and a slope it could touch upto 125 I suppose. On stock FZ the max I have done is 120, the speedo is very hesitant to dial the next digit after 118.

I think you need to do a speed test with atleast Duke or a Car on the front and see how much your Fazer can go so that you won't be in the dreamland of claiming that fazer touched 125km/hr.

Interesting how indian auto magazines spew performance figures (I think couple of them use data loggers but others???). Strictly on paper if you calculate the gearing, the FZ16 should do around 119 km/h (true speed) at 9,000 rpm (true speed). However, there are other factors that come into play when acceleration and top speed runs are done. Transmission losses, wind resistance, tarmac friction and resistance (also called roll on resistance), load on the engine (i.e. weight of rider and total wet weight), barometric pressure and altitude, humidity, and lots of other factors affect speed runs and top speed.

Another major factor (especially for acceleration) is the skill of the rider to exploit the power band of the engine. It requires an understanding of the way the engine is making power and where optimal shift points are.

The bottom line is that all these magazines are quoting different figures because they are testing in various conditions and using various methods and instruments to record their results. None of the factors and conditions in which the bikes are being tested are recorded or laid out while quoting the performance figures. I also have my doubts about the authenticity of these magazines. How impartial are these reports, how much is 'paid for' reports (monetary or in kind)?

Yes Calculating speed is really a tough job, I remember I was Riding my apache beside P200NS & Karizma mine was showing 85kp/h where as Karizma was at around 85/86 too but NS Was showing 90kp/h at same time .... wonder whose figure's were accurate ....


Even checked with Analog meter too hardly 1-3 kp/h difference was, mine was 60-61 his between 60-65

And practically I've achieved 133kp/h on My apache (not one time but several time I've went till 130-131) but whenever my Tank is full Bike takes effort to even reach 125 after 115 it gives indication of Peak power reached .... but no 5-6 liter in tank I can easily touch 120 without any effort ...

With Pillions with weight & almost half tank (no wind support) I"ve went till 115-116 too...

So what I believe is 115 is what Apache can deliver if added pressure weight & other factors

Whatever the speedo of my Fazer showed, the GPS reading never got past 112 kmph ever. I weigh 66 kgs, and I had to crouch while riding.



A video recorded by me and my bike just managed to touch 126 kmph on speedo.

@souymya_Digi: Do bear in mind that if you are using a phone GPS that is also not completely accurate. Phone GPS is accurate upto 2-3 mtrs max based on signal reception, terrain and other factors.

If really really one wants to find out the true speed then the Data loggers have to be used which are calibrated with the bike's weight, rpms, total gross weight (Bike+Fuel weight+Rider weight) etc. and other details.

Cheers,

Using those data loggers magazines found the top end of FZ, Fazer to be 110kmph only.

Using a speed gun is easier!

Speed guns have their own set of problems, including wrong locks and wildly off the mark readings. The most perfect way to do speed reading is to use a dedicated speed track and speed traps as used in drag racing or Salt Lake Bonneville (after all their recordings are considered official world speed records)

Mate,

i believe Abhimanyu31 has already answered quite aptly to that. The mags have not mentioned the variables under which such tests have taken place . Cheaper mags and sites mention the speed based on the speedo readings

Cheers,

I dont have a speed gun, So I stay in the previous decade and firmly believe whatever I see on the speedo . Lets say if the Fazer tops 110 while 120 on speedo and if you have favorable wind drag and a good slope then off-course the bike gains more momentum, isn't it? .Once I tried to check using gps calibration on my mobile (BSNL 3G) for an RTR and the top speed shown was 33 when speedo display well over 120.

TOP speed on fazer

The top speed on the speedo touched by me is 130kmph on fazer, that too on a slop and favourable wind conditions, doesnt always cross 120 mark but on 5 - 6 occasions i did manage to cross 125kmph.