The above is my reply to the present topic which I wrote back quite some time ago and extracted out by using the search feature of the forum.

On a different note, why do these same topics keep getting approved. The discussion on torque and rpms has been held before multiple times with in-depth discussion and fantastic coverage by knowledgeable members of this community.

It is important that members first search the forums for the already available excellent knowledge before simply submitting a new thread for mods to approve.

It is not the job of a moderator to redirect you to a previous post. Sometimes a mod will just approve a new post instead of taking the trouble of searching and redirecting to already available post for want of time or other constraints. The same trouble of searching that you should have taken in the first place.

I request members to first use the excellent search feature of the forum before posting anything. I also request mods to simply approve, ask the member to search the forum for available knowledge and close the topic. Otherwise we will keep reinventing the wheel over and over again.

For now, here are two links which discuss the exact same topic in comprehensive detail. Kindly go through these:





Ask questions from others to FURTHER your understanding, but first try to understand on your own rather than giving up and asking without even making an effort.

Necessary Disclaimer : This is not aimed at anyone personally, please be mature and take this post in the spirit that it is intended.

Even I think so the same.


Its ok if it not aimed personally, but in order to avoid repetitive post following steps needs to be taken -

1) We must improved our search engine..

2) A thread starter must have right to delete it post / thread started by himself with a permission of moderator (though necessary information might be preserved by moderator or back-end team), it will help XBHP SERVER tooo...

3) Thirdly, as We all know there are still unapproved / or thread pending for approval .. so what ppls dont like to wait so much on APPROVING PROCESS.I think we can avoid this by simple use my point no. 4.

4) We can make subpage even on the homepage so that a person need not to be roamed here and there.. this will improve our search option too. (like SITEMAP)

5) Even I tried to find something related to TORQUE & NM but not successful in that, may be i was trying with wrong keyword, or some other technical issue

I hope moderator will not blocked me after giving such suggestion .....

This topic has been discussed so many times, that if it appears again, I will ban myself, like a suicide.

Anyways buddy, you can just understand that most bikes which have maximum torque at lesser rpm's like Suzuki Zues/ heat (3000 rpm), RE (around 3000 rpm or so), etc. usually have the "push" right from the launching of the bike...

and the bikes having higher torque and power figures, like R15 (7500 rpm), etc. may have to be accelerated more, and revved higher to reach that high point and experience the "push".


In short, "Push" that you experience while riding a strong bike, is a force that comes from an engine. And Torque is the "push".
So, "push" = "force" = "torque". Clear now?

There are torque graphs of motorcycles and cars, that show what torque does a bike make at different rpms.

Correct me if i am wrong(90% odds), In my thoughts peak torques is at the RPM near to which we start feeling the urge to shift up when riding economically and max power is where the engine starts to feel losing blood pressure during spirited riding

i would like to disagree with Samarth as i ride a slingshot which is essentially a Suzuki Zeus/Heat, maximum torques is where engine produces maximum load carrying capacity(IMOAPS) so at 3000RPM bike is able to travel in 5th cog without any jerking but to get that push as Samarth stated bike needs to be taken to even higher RPMs where maximum power kicks in, Bikes like R15/Gladi etc... has maximum torque at higher RPM so that when riding slow you'll have to stay on smaller gears.

As i already stated everything above is IMOAPS only,please guide me to the correct path

Buddy, mostly you're right, specially about the R15/ Gladiator.
But, as for your first point, we shift up usually near/ under max torque zone because we don't usually give full throttle while riding on normal roads. Hence, we feel the urge. Mostly all engines are being tested for power/ torque at full throttle only.

So, go full throttle and it won't ask give you the urge to upshift.


Wherever in the rpm range your bike has maximum torque, you will feel that at this point, it rides rock steady, unaffected by other forces like headwind, tailwind, etc. In other words, its "force" is maximum.


And, Slingshot's engines are tuned from the Zues/ Heat engines. It makes maximum torque at 3500 rpm instead of 3000. But again, does it have a tachometer by which you can confirm your experience?

Re: What Does Torque of Motorcycle actually means?

Torque is basically the force put to the ground to move the car from the tires. So more torque = more acceleration. Also, this applies for heavy towing as well like in trucks. You'd need a lot of force (torque) to put down to the pavement to haul a 15,000 lb trailer. Picture torque as like how strong you are, and horsepower could be like how fast you are. If you're just fast but not strong, you'd be able to run pretty fast but only if you weigh like 100 lbs. If you're fast AND strong, you can run the same speed as the other guy while carrying two boulders on your shoulders. If the guy who's both fast and strong put the boulders down, he would have a quicker take off than the "fast only" guy along with keeping the same speed as him. Then if another guy was just strong but not fast, he'd be able to carry the boulders but would be left in the dust.

Re: What Does Torque of Motorcycle actually means?

The formula of Power is (2*pi*N*T)/60 where pi is 3.1428, N is engine speed in rpm and T is torque in Newton-metre. The unit of Power is in Kilowatts which can be converted to BHP by dividing the resultant value by 0.7645.As you can see from the formula, power is directly proportional to the engine speed and torque. To increase power, you can either increase the torque or make the engine revv higher. Some engines have very low rpm range but still they accelerate decently. That's because mainly the torque is making the engine accelerate. A Volkswagen Polo diesel redlines at just 4000rpm but still it has more horsepower and still it accelerates nicely. Why? It's because of the torque. In other words, the torque compensates for the rpm. Now in some engines, the torque is low but it revvs too high. Take the classic example of Ninja 250. It has torque of just 22nm but still can smoke anything below it's category. Why? Because it revvs high. 22nm is produced at 10000rpm and 33bhp at 11000rpm. Here, the rpm compensates the torque. I know that I shouldn't be comparing cars to bikes but it's just for simple understanding.Longer the stroke is, lesser is the rpm range. Shorter the stroke is, greater is the rpm range. But then, there are exceptions. A Pulsar 220 having stroke more than 60mm revvs as high as 11.2k rpm on tacho and Duke 200 having a short stroke of just 49mm revvs ridiculously low at 10500rpm.Bottom line is, a bike with short stroke and power producing at high rpms can accelerate much better in straight line as compared to a bike with power peaking out in lower rpms due to long stroke. Having said that, if you can make the latter revv as high as the former, then I'm sure that the latter will accelerate better than former. But it is not advisable to make a long stroke motor revv high coz it leads to more wear and tear of the engine and ultimately reduces life. But a long stroke motor will have better roll-on acceleration than a short-stroke motor (R15 vs CBR150R) i.e roll on from higher gear and lower speed.