BS4 ENGINE VS BS6 ENGINE — Why BS6 is Better?

Bikers Duniya
2 min readMar 14, 2021

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To regulate the pollution emitted by cars and two-wheelers, the govt of India has put forth regulations referred to as Bharat Stage Emission Standards (BSES). The Central government has mandated that each vehicle manufacturers, both two-wheelers and four-wheelers, should manufacture, sell and register only BS6 (BSVI) vehicles from 1 April 2020.

In this article, you’ll study the BS4 vs BS6 engine, major differences, and therefore the performance of the new BS6 engine.

Technical Difference

First of all, you need to know why BS4 engines are terminated & BS6 engine is introduced in the market. When a motorcycle or car runs lots of harmful gases come out from its exhaust. All these gases harm the environment as well as the human body, So Indian Government time to time brings some new rules known as bs Norms & tell them to all manufacturer company. BS6 Engine produces very less harmful gases compared to BS 4 Engine, here are the limits which are changed in BS 6 Engine,

Two-Wheeler: Carbon Monoxide (CO)BS-IV Engine1.970 g/kmBS-VI Engine1.000 g/km

Two-Wheeler: Hydrocarbon (HC)BS-IV EngineNo LimitBS-VI Engine0.10 g/km

Two-Wheeler: Nitrogen Oxide (NOx)BS-IV Engine0.39 g/kmBS-VI Engine0.06 g/km

Engine Operation

In BS 4 Engine you may notice that a maximum of them was in carburetors but in today’s time, Fuel Injection is used mostly in BS6 Engine.

Mechanically & Electrically Operation

In BS4 Engines Carburetor was there, We can manually tune the carburetor from there, Like how much fuel & air we want to send in the Engine. Petcock valve was also there, from where fuel passing can also be controlled. But in BS 6 engine ECU is situated there So everything is automatically controlled there by the ECU unit itself. Bikes coming with BS6 Engine are full of sensors that were not in BS4 Engines, So we can tell that BS6 Engine is more Electrically controlled.

Engine Performance

Fi Engine means in BS6 engines engine performance is also improved, As an example in Pulsar NS 200 in the BS4 Variant engine produces 23.5 ps max power but in the BS6 variant, it produces 24.5 ps max power. But if you tune your BS4 bike properly it can also give you a better performance.

Read more at Bikers Duniya: https://bikersduniya.com/bs4-engine-vs-bs6-engine-why-bs6-is-better

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Bikers Duniya
Bikers Duniya

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