a new 149cc engine and five-speed gearbox, which also powers Hero Honda Achiever and Honda Unicorn with Advanced Microprocessor Ignition System which was introduced first by Hero Honda in Hero Honda Ambition 135. 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. After the separation of Hero Honda joint venture in 2010, Hero Updated next generation model by changing the bike name as Hero Xtreme in 2013. Transient Power Fuel Control Transient Power Fuel Control system uses its nozzle inside the carburetor to sprays petrol inside the engine. So, when the rider opens the throttle suddenly. it will give power instantly to rev the engine without any issues, nearly equal to fuel injection concept but it is powered mechanically, whereas Fuel injection is an electronic concept. This increases the throttle response crisps as like fuel injection and the engine feels lively. However, this increases the emission levels and TPFC Accidentally waste some amount of fuel, Because, the accelerator pump inject some extra amount fuel when the rider applies sudden throttle compensate for lean air-fuel mixture which it generates. Hence, TPFC was consequently discontinued. Later, the fuel injection technology replaced the carburetor, it performs the same mechanism but drastically improves the fuel efficiency, due to correct level of air-fuel mixture performed electronically instead of old Carburetor mechanism.. Related bikes Hero Honda Ambition 135 Hero Honda Karizma R Hero Honda Splendor Hero Honda Hunk Hero Passion Hero Pleasure Hero Honda Achiever Honda Shine Honda Unicorn Hero Honda Super Splendor Hero Honda Karizma Hero Honda Karizma ZMR Honda Activa References . Related bikes Hero Honda Ambition 135 Hero Honda Karizma R Hero Splendor Hero Honda Hunk Hero Passion Hero Pleasure Hero Honda Achiever Honda Shine Honda Unicorn Hero Honda Super Splendor Hero Honda Karizma Hero Honda Karizma ZMR Honda Activa External links CBZ Motorcycles introduced in 1999