Announcement

**lockhrt999** · 12-06-2011, 02:33 PM

Originally posted by Nithesh View Post

the Indian made CBR comes with a rev limiter aswell. Thai made doesnt.

Basically most of the bikes have rev limiter to save engine from overheating. But on duke 125 it kicks in earlier to limit engine producing more power.

Originally posted by Nithesh View Post

As for ur "figures", are you just pulling it out or did you do some calculations for it?

Buddy it's a dead simple maths. As the KTM official has said on motoroid report, it does 127 kph at 10K in 6th gear and then doesn't let engine to rev higher than that even though it has enough torque remaining to push the bike upto 12K RPM. Now one doesn't have to be even smarter than 5th grader to calculate its speed at 11k, 12k rpm(off course with power limiting rev limiter removed). 127kph/10K rpm = 12.7kph/1K RPM. And that's how @ 11K RPM, the speed is 12.7 x 11 = 139.7 KPH... so on so forth.
Gotcha?

**lockhrt999** · 12-06-2011, 02:52 PM

Originally posted by payeng View Post

Is it just me or the bike actually looks better (filled up) with the rear tyre hugger..??

I agree. It feels more complete.

But that saree guard is useless and won't offer any protection. It's just a show piece to keep govt officials happy. I think the companies must be paying pile of money as bribe to those officials to get such designs approved. On pulsars they have hidden the front number plate by cleverly tucking it under headlight. The number plate can't be read from any direction unless you are ready to crouch down.

But look at the bright side, everyone is happy now.
I'm, because now traffic police will have hard time to read the number.
Onlookers, because it's no longer pain in the eyes to look at. And is better looking this way.
Bajaj, because no extra metal mount need to create, which is great way of cost cutting and exporting to other countries where front plate is non-existent, the process requires less hassle.
Govt officials, now they can buy a plasma or two.

Who said bribes are bad?

**the_mechanic** · 12-06-2011, 03:21 PM

>>>>> Awesum Calculations !

Originally posted by lockhrt999 View Post

Basically most of the bikes have rev limiter to save engine from overheating. But on duke 125 it kicks in earlier to limit engine producing more power.

Buddy it's a dead simple maths. As the KTM official has said on motoroid report, it does 127 kph at 10K in 6th gear and then doesn't let engine to rev higher than that even though it has enough torque remaining to push the bike upto 12K RPM. Now one doesn't have to be even smarter than 5th grader to calculate its speed at 11k, 12k rpm(off course with power limiting rev limiter removed). 127kph/10K rpm = 12.7kph/1K RPM. And that's how @ 11K RPM, the speed is 12.7 x 11 = 139.7 KPH... so on so forth.
Gotcha?

With the hype around KTM 200 the people seem to re invent engineering & mechanics yea & aerodynamics too I have been following the thread for a while & I am super amazed with the calculations leading into some abrupt figs, I dont want to contradict anyone or prove anything but the fact is the above " Simple Math " is WRONG u cant calculate 12.7kph/1k RPM so KTM would not be around the CBR 250 in terms of top speed, it mite get close in 0-100 figs but i am sure it wont better it by any chance the facts available on paper indicate them clearly. So people expecting or living in illusion tht it would be faster than CBR the truth is it wont ! its a request ...KTM is a wonderful product accept it the way its build& enjoy it for what it is.

**s_hari** · 12-06-2011, 03:50 PM

Question to XBHP team who got the chance to review the bike

Question to XBHP team who got the chance to review the bike:

Did we put a question to the Bajaj/KTM team on what exactly was the contribution by each company (Bajaj and KTM) in developing the vehicle. This will give us a idea in which areas Bajaj has contributed and gained experience as this same experience would be/have been used in development of next generation of pulsars and disovers

**lockhrt999** · 12-06-2011, 04:06 PM

Originally posted by the_mechanic View Post

With the hype around KTM 200 the people seem to re invent engineering & mechanics yea & aerodynamics too I have been following the thread for a while & I am super amazed with the calculations leading into some abrupt figs, I dont want to contradict anyone or prove anything but the fact is the above " Simple Math " is WRONG u cant calculate 12.7kph/1k RPM so KTM would not be around the CBR 250 in terms of top speed, it mite get close in 0-100 figs but i am sure it wont better it by any chance the facts available on paper indicate them clearly. So people expecting or living in illusion tht it would be faster than CBR the truth is it wont ! its a request ...KTM is a wonderful product accept it the way its build& enjoy it for what it is.

Excuse me?
When did I say it will be faster than CBR250? On the other hand please go back in the same thread where you'll find a my post that this Duke 200 may not be fastest indian but have potential for quickest indian.
Clear your facts!!
And how on the earth those calculations are wrong, care to explain? If a bike does 100 kph at 10K RPM in certain gear, that means the step value is 10kph for each thousand kms. Unless the bike's clutch plates have gone kaput or primary or secondary gearing rations are changed that step value stays constant for eternity.

**R-series** · 12-06-2011, 05:23 PM

Anyone mentioned "No short gearings?"

"With a slightly taller first gear complimented by short second, third and fourth gears,.."

source : KTM 200 Duke: First Ride Page - 2| Zigwheels.com

**s_hari** · 12-06-2011, 05:58 PM

XBHP police

Request to XBHP police : Sunny bhai is missing along with his review on Katooom 200. Please find him asap.

**the_mechanic** · 12-06-2011, 07:28 PM

Originally posted by lockhrt999 View Post

Excuse me?
When did I say it will be faster than CBR250? On the other hand please go back in the same thread where you'll find a my post that this Duke 200 may not be fastest indian but have potential for quickest indian.
Clear your facts!!
And how on the earth those calculations are wrong, care to explain? If a bike does 100 kph at 10K RPM in certain gear, that means the step value is 10kph for each thousand kms. Unless the bike's clutch plates have gone kaput or primary or secondary gearing rations are changed that step value stays constant for eternity.

I neva said u told KTM is fastest or anything it was a general comment on the thread. As far as the 12.7/1k RPM calculation theory is concerned ...R15 does 90 kmph @ 6000 rpm so as per your formula its 15kmph/1k RPm would make R15 go at 150kmph @ 10k RPM or for tht sake CBR does 120 kmph @ 7k RPM so it should do a 170@ 10k RPM ...plz understand the fact RPM is not directly proportional to speed the vehicle.

Below is the formula to derive speed of the vehicle depending on the RPM

(0.00595) * (RPM * r) / (R1 * R2) = vehicle speed in miles/hour

where:
RPM = engine speed, in revolutions/minute
r = loaded tire radius (wheel center to pavement), in inches
R1 = transmission gear ratio
R2 = rear axle ratio

**Wanted DoA** · 12-06-2011, 08:39 PM

Originally posted by the_mechanic View Post

I neva said u told KTM is fastest or anything it was a general comment on the thread. As far as the 12.7/1k RPM calculation theory is concerned ...R15 does 90 kmph @ 6000 rpm so as per your formula its 15kmph/1k RPm would make R15 go at 150kmph @ 10k RPM or for tht sake CBR does 120 kmph @ 7k RPM so it should do a 170@ 10k RPM ...plz understand the fact RPM is not directly proportional to speed the vehicle.

Below is the formula to derive speed of the vehicle depending on the RPM

(0.00595) * (RPM * r) / (R1 * R2) = vehicle speed in miles/hour

where:
RPM = engine speed, in revolutions/minute
r = loaded tire radius (wheel center to pavement), in inches
R1 = transmission gear ratio
R2 = rear axle ratio

Lockhart is right.

going by formula you gave..

speed = c*RPM*r/(r1*r2)

where c= 00595

now lets simplify this..

speed = RPM * ((c*r)/(r1*r2))

now if the gear is unchanged (suppose we're riding on 6th gear only)
the only variable values will be speed and RPM. and transmission gear ratio, rear axle ratio, loaded tire radius will be constant for same gear.

so speed = RPM * K ...where K = (c*r)/(r1*r2) which is a constant (for same gear)

Hence be proved: speed is directly propostional to rpm.

example:

1st. A bike is moving at 'x' speed @5000 rpm
2nd. same bike is moving at 'y' speed @10000 rpm

going by what we evaluated above y will be double of x in ideal conditions.

**Digital_shubhi** · 12-06-2011, 10:30 PM

Still no Ride report..

How long we need to wait for it......

**Sunny** · 12-06-2011, 10:39 PM

Patience please, QUALITY takes time

Tomorrow afternoon max!

**J K** · 12-06-2011, 10:41 PM

Waiting.....................

**chicane1879** · 12-06-2011, 10:41 PM

A Sincere request...

If possible, please include the performance figures vis-a-vis the competition!!

**Shubz** · 12-06-2011, 10:42 PM

And videos too! Badly want to know what it sounds like!

**payeng** · 12-06-2011, 10:51 PM

Originally posted by chicane1879 View Post

A Sincere request...

If possible, please include the performance figures vis-a-vis the competition!!

From Varad More's Zigwheel's review, it seems that the 200 Duke is a Focussed Street Hooligan. Therefore "apples to apples" comparision would be with the Yamaha FZ and the likes, the result of which we all can kind of predict.

Zigwheels: "No unnecessary tries at making it best of all worlds with tourer-friendly laid-back yet sporty two-piece clip-ons or a feeble effort like some of its rivals to club racing ergonomics with comfort in one package.

This is an out and out naked hooligan for the street who is utterly shameless about its arrogant character and one who does not feel intimidated nor threatened by anything the rider has to throw at it."

Originally posted by Shubz View Post

And videos too! Badly want to know what it sounds like!

Autocar India: "This motor loves to be revved and produces a fantastic aural note while doing so and what’s great is that the engine feels smooth at all speeds".

Announcement

KTM Duke 200: Review out on xBhp very soon!!!!

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