BS4 vs BS6 Two-Wheelers: Differences, Mileage & Resale Value

Compare BS4 vs BS6 bikes, mileage, cost, emissions & resale value in India.

BS4 vs BS6 Two-Wheelers: Key Differences Every Rider Should Know

Well, if you've been biking for a while, there is a chance that maybe, just maybe, you would have come across the names “BS4 bikes” or “BS6 bikes”. But what do these actually mean? “BS4 and BS6 are actually short forms of some guidelines or standards on emission specifications, which is more of a guideline on how much cleaner or more efficient the engine of the bike needs to be.” Now, let’s see what is important to consider when buying or selling a new bike.

In this article, we will discuss all that you need to know about BS4 vs BS6 two-wheelers. Moreover, we will let you know why choosing the right BS between BS4 and BS6 can result in saving you money in the long run for you. Furthermore, discover how you can engage the services of Vutto to discard your existing BS4 motorcycle and purchase a brand new one.

1. What Are BS Emission Standards?

“BS” is shortform for “Bharat Stage”, which is equivalent to the standard of air quality required in India. This is implemented by the Government of India, in an attempt to lower the amount of air pollution, which is caused by transport vehicles, to some extent. This is similar to Euro-norms that are implemented within the Euro-nations of Europe. In each succeeding level, the restrictions on the amount of carbon monoxide (CO), hydrocarbon emission (HC), and nitrogen oxides (NOx) that your bike may emit become even stricter.

• BS4 (Bharat Stage IV) emission norms were introduced from 2017.
• BS6 (Bharat Stage VI) emission norm was enforced in the whole of India from 1st April 2020, bypassing the earlier standard of BS5. The move from BS4 to BS6 marked one of the biggest technological shifts in India’s two-wheeler industry.

2. BS4 vs BS6: Key Technical Differences

Let’s now see the points where BS6 motorcycles are different compared to BS4 models and how this affects bike consumers.

A. Cleaner Emissions

The key differences lie in the emissions control system. The BS6 motorcycles are designed to emit lower levels of nitrogen oxides by a maximum of 70% and lower levels of hydrocarbons and particulate matter.

B. Fuel Injection (FI) vs Carburetor

The majority of the BS4 motorcycles used carburettors as fuel systems, but the fuel systems of the BS6 motorcycles have fuel injectors. Fuel injection ensures much better atomization of the fuel-air mixture, along with optimal power, mileage, and refinement. On the other hand, the BS6 bikes have been made costlier by fuel injection.

C. Engine Performance

BS6 engines perform in a more efficient way with smoother acceleration and purer combustion. Oxygen (O2) sensors and Electronic Control Units (ECUs) have been incorporated to improve the power performance. Though the initial BS6 models have seen a slight performance loss, the companies have now managed to optimize the engine performance to sometimes even better than BS4 norms.

D. Price Difference

With the increase in technological components like catalytic converters, sensors, and fuel injectors in the bike, the price of the BS6 bike has gone up by 10-15% as compared to the BS4 bike Nevertheless, the cleaner ability and extended engine life make the cost difference worthwhile.

E. Fuel Compatibility

BS6 engines require BS6 fuel, which has lower sulfur content. Usage of BS4 fuel in a BS6 engine can be detrimental, but nowadays most fuel outlets across India offer BS6 fuel or BS6-grade petrol.

3. Impact on Mileage and Maintenance

Another big myth circulating about BS6 bikes is that they are less fuel-efficient, whereas, in reality, BS6 motorcycles are actually more fuel-efficient, as the fuel injection system injects the right amount of fuel at the right time.

Maintenance costs can be a little higher since the FI systems do require periodic servicing by a trained technician. They also give your engine a more extended life and reliability.

But if you have a BS4 bike that is still in running condition, you can very well continue using it legally. However, as years go by, their spare parts will gradually become less available, and, quite rightly, this would be the right time to sell your bike to upgrade to BS6 bikes.

4. Why Upgrading from BS4 to BS6 Makes Sense?

BS6 motorcycles are not only cleaner but also future-ready. As cities move toward stricter emission zones, BS4 bikes might face restrictions in some regions in the coming years.

Upgrading to a BS6 motorcycle ensures:

• Better fuel efficiency
• Smoother ride quality
• Lower emissions and pollution
• Higher resale value

Being a BS4 bike owner, Vutto can assist you in selling your bikes quickly at an appropriate and fair market value through “Sell Your Bike”. Also, Vutto buys pre-owned two-wheelers (BS3 and BS4 bikes) and pays instantly on inspection.

5. How to Sell Your BS4 Motorcycle Easily

Since the market is shifting toward BS6 two-wheelers, now is a great time to sell your bike if it’s an older model. The sooner you sell, the better your resale value.

Here’s how Vutto simplifies the process:

• Instant Valuation: Visit Vutto’s website and enter your bike’s make, model, and year for a free market valuation.
• Quick Inspection: Schedule a free inspection at your home or a nearby Vutto centre.
• Fair Offer: Get a competitive quote based on your motorcycle’s condition.
• Instant Payment: Receive payment directly to your bank account within minutes.
• Paperwork Done for You: Vutto handles RC transfer and legal documentation.

No middlemen, no delays, and no risks — just a quick and transparent way to sell your bike safely.

6. What Happens If You Keep Your BS4 Bike?

If your BS4 motorcycle is well-maintained, you can continue riding it without issues. However, over time:

• Spare parts might become harder to find.
• Service centres may prioritise BS6 models.
• Resale value could drop significantly.

That’s why selling your BS4 motorcycle now — while demand still exists — makes financial sense. Vutto provides a hassle-free way to do this without compromising on value.

7. Environmental Benefits of BS6 Bikes

BS4 to BS6 transition is a regulatory changeover, but it’s a transition that ensures aces of fresh, clean, and pure airflow for every individual. BS6 bikes give off fewer toxic and particulate emissions.

Therefore, by selling your bike and purchasing a new BS6 vehicle, you are not merely upgrading your vehicle – you’re helping to ensure a brighter, more sustainable future.

FAQs About BS4 vs BS6 Two-Wheelers

Q1. Can I still ride my BS4 motorcycle in India?

Yes. As long as it’s registered, insured, and maintained, you can continue using it legally.

Q2. Is BS6 fuel safe for BS4 bikes?

Yes. BS6 fuel can be used in BS4 motorcycles without issues, but the reverse is not recommended.

Q3. Can I sell my bike if it’s a BS4 model?

Absolutely. Vutto directly buys BS4 motorcycles, providing instant valuation and payment.

Q4. What is the resale value difference between BS4 and BS6 bikes?

BS6 bikes usually have a 10–20% higher resale value, depending on brand and model.

Q5. Is it better to upgrade to BS6 now?

Yes. BS6 bikes are cleaner, more efficient, and future-proof — making them a smarter investment for long-term riders.

Final Thoughts

The move from BS4 to BS6 is an impressive step toward a future where two-wheelers in India are not only clean and smart but also less polluting and more fuel-efficient. The new bikes of this BS6 generation will be the ones to use for daily commuting due to their improved efficiency, lowered emissions and greater mileage.

If you own a BS4-type motorcycle and wish to upgrade, you must definitely sell your bike NOW. Vutto offers instant evaluation, inspection, and secure transaction within just a few days. Make sure you have the new BS6 model with the good feeling of having taken an environmentally responsible and satisfying choice not only for yourself but for the earth too.