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**ken cool** · 10-30-2009, 11:03 PM

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**jasmeetsinghchawla** · 10-31-2009, 12:18 AM

Originally posted by aryan rajvanshi View Post

The reason to start this thread is because of my childhood arguments with my friends.I dont know the reason why manufactures gives more speed in the speedometer than the bike goes.ok giving the speed of 5-10km/hr more than the actual speed is justified but giving speed of eg-140km/hr in splendor is just foolish because i dont think that stock splendor can cross 100km/hr mark in any case.when my age is 10 i always think that the top end of a bike is same as given in the meter

but when my knowledge of bikes increases i come to know that it is a wrong conception but even at that time i have many arguments with my friends .So guys please guide me what is the relation between the actual and given top speed of a bike.

if it is just to show off that their (manufactures) bike has more top speed than it is surely foooolish

.

Thank God you thoght those things in your childhood some people think the same for their whole life.

**Yamaha_Gladiator** · 10-31-2009, 12:21 AM

Originally posted by jasmeetsinghchawla View Post

Thank God you thoght those things in your childhood some people think the same for their whole life.

so does that mean that the manufacturers make it for some kinda show-off

**ravi@17bhp** · 10-31-2009, 12:32 AM

Keeping aside digital speedometers, all analogue speedometers have speedo error at higher speeds and I guess it is unavoidable. In digital speedometers, correct speeds can be achieved with contactless sensors, but most of the digital speedometers in indian bikes still have speedo errors at higher speeds.

**amardeep2006** · 10-31-2009, 12:57 AM

for me it's false advertising

I would suspect the marketing guys had a hand in putting it there. There is no real useful purpose in doing that either other than ego stroking and of course a hope for more sales.

**moeed** · 10-31-2009, 01:14 AM

It is the case with almost all the Indian bikes. The sbk's have a meter reading till 300 km/h and they achieve it. But here, the bikes can't even come close to the top speed given on the speedometer.

225 cc bikes: 200 km/h
150 cc bikes: 160 km/h
125 cc bikes: 140 km/h
100cc bikes: 140/120 km/h

The max I could do on my bike was 110 km/h(after a lot of struggling and crouching on a slope)

**ravi@17bhp** · 10-31-2009, 01:25 AM

I do not think it is a great issue at all.

**jd666** · 10-31-2009, 07:52 AM

I think its got more to do with testing the bike on a rig, and opening her up in top gear. you can hit the rev limiter in 1st, 2nd, 3rd, but not in the top gear ( either 4th or 5th ), But try this, if you jack up the rear wheel, and can do it safely, you can hit the rev limiter in top gear also. That speed of the wheel at top gear, plus some margin is kept in deciding what the top speed indication of the bike should be.

Also meters generally over read the speed by 10-15%. So an allowance has to be made for that as well.

Moreover sometimes meters are shared across platforms, ( for eg the pulsar family, the 150s and the 180 first generation, and now the digital one is shared across all ). So its better to have one meter fit all meter assembly, cheaper for the manufacturer to order and install.

hope this helps.

**aryan rajvanshi** · 10-31-2009, 10:07 AM

When honda launched aviator after activa they also increases its meter speed by 20km/hr and its actual speed increases only by 4-5km/hr.I think by this method they can fool those who have less knowledge of bikes.

**rahuldevnath** · 11-01-2009, 12:27 PM

Most of it - is aesthetic, and the feel good factor.
The difference also lies between scooters and motorcycles. For vechicle which will not go beyond 100, putting say just 110 on the speedo, will be tough, and the clocks will also take much time to hop from say 10 to 20Km (the Physical space).

**Samarth 619** · 11-02-2009, 01:12 AM

I personally hate wrong reading speedos. For instance, my Pulsar UG3 shows 125-127 kmph max in Stock, which is 118 kmph real or so, because I saw top speed figures in Magazines...
On a 40 teeth sprocket, it showed 131. But, What's the real speed when 131 shows on the speedo?

New Karizma ZMR has a contact less sensor. Bike India said that 60 on its speedo is 59.4 in real or so... which is fairly accurate I say.

---
@ moeed: Problem's not about what speedo shows. Problem is that when it shows 100, you are actually doing 85 or 90 kmph ONLY ... In other words, speedo readings are wrong.

**jd666** · 11-02-2009, 02:36 AM

@rahuldevnath - correction mate, if they put only 110 or 120 on the speedo, then the needle will climb much faster, as the intervals will be spaced out more, and for a given speed increase, the arc of the needle will be much higher. So that will infact have a more psychological effect of acceleration or speed increase, but then its not done for that.

Im not sure of the terminology, but yes meters are also designed keeping the visual impact they have on the rider, and also how clearly the speed can be read out.

**aryan rajvanshi** · 11-02-2009, 08:43 AM

Originally posted by jd666 View Post

@rahuldevnath - correction mate, if they put only 110 or 120 on the speedo, then the needle will climb much faster, as the intervals will be spaced out more, and for a given speed increase, the arc of the needle will be much higher. So that will infact have a more psychological effect of acceleration or speed increase, but then its not done for that.

Im not sure of the terminology, but yes meters are also designed keeping the visual impact they have on the rider, and also how clearly the speed can be read out.

But dont forget that the top speed of rx 100 is 100km/hr and they give 120km/hr on the speedo.i think it is much better and it is also not scary at all.

**rahuldevnath** · 11-02-2009, 11:58 AM

Originally posted by jd666 View Post

@rahuldevnath - correction mate, if they put only 110 or 120 on the speedo, then the needle will climb much faster, as the intervals will be spaced out more, and for a given speed increase, the arc of the needle will be much higher. So that will infact have a more psychological effect of acceleration or speed increase, but then its not done for that.

Im not sure of the terminology, but yes meters are also designed keeping the visual impact they have on the rider, and also how clearly the speed can be read out.

Yes, you are right, just got confused, but then that could be the reason why till few years back there's wasn't a huge margin in max speed.

Originally posted by aryan rajvanshi View Post

But dont forget that the top speed of rx 100 is 100km/hr and they give 120km/hr on the speedo.i think it is much better and it is also not scary at all.

For manufacturers adding some speedo error, and increasing the max indicated speed to 140 would seem to be better.

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