The CBZ has an Over Square and Overhead camshaft engine with a Keihin slide type carburetor with accelerator pump.

It has a larger spring operated nozzle to provide a richer fuel air mixture into the engine for better acceleration.

The term TPFC Means Transient Power Fuel Control system CarBikeTech (12 May 2017).

This Carburetor plays a major role by increasing the speed without any Power lag and Vibration jerks.

In 2004, a new variant called CBZ Star was launched with revised graphics and addition of self start, it replaces the Keihin Slide Carburetor with Conventional CV Carburetor which improves the fuel efficiency but hampered in pickup which is main feature of previous model CBZ, and was not popular due to over use of graphics and significantly higher price compared to its competitors.

After 3 years it got facelift update by changing clear lens indicators, tail lamp setup and part digital instrument cluster and Hero Honda CBZ-Xtreme Complies (BS3) emission norms Bharat stage emission standards.

This increases the throttle response crisps as like fuel injection and the engine feels lively.