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2 min read13K Views

KTM 125 Duke BS6 vs BS4: Differences Explained

The two motorcycles not only look identical but also have the same power output. So what’s different?

The two motorcycles not only look identical but also have the same power output. So what’s different?

[Update: KTM has launched the 2021 125 Duke in India. Click here to read about it]

KTM recently launched its entire BS6 portfolio, including a heavily updated 200 Duke and revised 390 Duke. Unlike its larger cousins, the 125 Duke BS6 gets fewer updates but receives a substantial price hike. It now costs Rs 1,38,041 (ex-showroom Delhi). That is an increase of Rs 5,541 over the BS4 125 Duke.  So what do you get for that premium? 

 

Engine:

The 125 Duke BS6 gets a cleaner BS6-compliant motor. Its exhaust routing too has changed -- it has been routed from under the motor than around it. Despite the update, KTM has done well to keep power and torque output identical to the BS4 125 Duke. The new motor delivers 14.5PS at 9250rpm and 12Nm at 8000rpm. Even their weight is identical so both motorcycles are expected to offer similar performance. 

 

Cosmetic updates:

The KTM 125 Duke BS6 gets minor cosmetic updates in the form of a completely black engine cowl and a blacked-out underbelly exhaust. At a fleeting glance, you would be hard-pressed to differentiate the BS6 125 Duke from its BS4 predecessor. 

 

Underpinnings:

Both bikes remain unchanged in terms of underpinnings as well. They have the same dimensions and use the same trellis frame with WP upside-down forks and WP monoshock setup. Even braking remains the same -- ByBre 300mm front and 230mm rear disc. The only major change is ground clearance. The KTM 125 Duke BS6 now has a 20mm lower ground clearance due to the new exhaust routing. 

 

Availability:

 

The new KTM 126 Duke BS6 will be available from April 1. That’s the deadline for BS6 vehicles, post which you will not be able to buy the BS4 KTM 125 Duke. If you are planning to buy the KTM 125, we suggest going for the BS4 variant as the updates are not much to justify the BS6 125 Duke’s price premium. You might need to hurry though as the BS4 version will be available in limited stocks.

 

KTM 125 Duke User Reviews

R
rinku on Jun 25, 2026
3.8
Service cost 2k aa jata

Service cost 2k aa jata hai, best oil 7100 good mileage, good performance 800 tank full ho jata hai, 45 ka average aram sa de deti hai 200cc ka compare kare to 125 cc best hai, har chiz bs top speed 135 hai 200 ki top speed 150 tak jati hai, itna hi fark hai bas power dono me same hai, aur average bhi acha de deti hai, 10 second me 70 sa 80 speed pakad lati hai. Read More

A
aditya on Feb 05, 2026
4.3
Pocket Dynamo

I got this bike back in 2019 when it was launched, I was beginner so my first choice was a bike with moderate power and torque and good ride comfort. So, I went through lot of options, FZ l, Apachi 160 and 200 , Classic 350 and Duke 200. I got my eye on FZ as it was very much beginner Friendly and it was pocket friendly too. I decided to book FZ but on the same day KTM dropped this Pocket Rocket duke 125 and obviously for me it was a show stopper, without any second thought I went through the specs sheet and boy oh boy it felt just like a match made from heaven. I went to showroom the very next morning and just booked my duke 125 and after a month I got the delivery and till after after 7 long years, I have regretted for one single day. Good quality and best feeling riding this Pocket Rocket. Total in 7 year's, I have rode 51,000 kms on odo where I have only used it for ride propose and not for commute purpose. The best thing about this is the ride comfort because of the posture and ride quality. I have done Pune - hyderabad - Pune in 24 hrs with 4 hrs of sleep. I have rode on different terrains and in every seasons and it has never disappointed me in any given situation. I love riding it everyday with or without luggage. It feels fun to ride. Of course, I recommend it to every college boy with no riding experience to start their journey with this bike as it offers good amount of power and torque and would help you to be a good and safe rider with it's features. It will fall you in love with the motorcycle world and also take you to the places you thought of riding once in your collage days. It also offer mileage of 40 kmpl which is also good as a beginner. It will help you understand many concepts of motorcycle rider which will help you in future when you upgrade to a high cc. Read More

A
akshay on Jan 07, 2026
5.0
Perfect for riders

KTM DUKE is my favourite bike this bike is comfortable to ride and highllight as a premium, ideal for new rider waiting for experience offering sharp looks excellent handling tech like a TFT Display act. Duke 125cc is the sharp handlling for riders, offering a premium, agile city ride with sharp great look and refined performance first class like a big bike in small package though its engines feel under powered on road KTM Duke 125 cc is highly recommended as a premium, Stylish beginner bike for city commuting ktm feel worth decent power for it class but is main drawbacks are higher price for 125cc ktm bike is comfortable for city rideRead More

S
sandeep on Apr 06, 2025
4.0
i love bike

This bike is verry good. I love this brand My favourite bike KTM Duke 125 beacouse this bike is past brand in indian 125 cc segment liquid cool engine i gone to buy this brands bike beacouse this is my dream brand KTM . this bike provide by mileage 45 to 50p kmpl This bike price in India 2.8 lack .Read More

D
debajit on Feb 16, 2025
5.0
Favourites

This bike is verry good. I love this brand My favourite bike KTM Duke 125 beacouse this bike is past brand in indian 125 cc chekment liquid cool engine i gone to buy this brands bike beacouse this is my dream brand KTM . this bike provide by mileage 45 to 50p kmpl This bike price in India 2.8 lack . Read More

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Benjamin Noel Gracias
Senior Correspondent. Loves bikes and the technical bits associated with them. Has traveled extensively across the country and been reviewing bikes for the past four years.
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