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We all do it: Browse through a motorcycle’s spec sheets to look for the engine’s power above everything else. But why do more and more spec sheets use the unit kW for engine power instead of HP? Why do not we settle on just one power unit?

The short answer is about accuracy and a standard measurement, as we shall see below.

Where did HP (horsepower) come from?

It all goes back to the invention of the steam locomotive.

Thomas Newcomen was the inventor in 1712, but it was James Watt (familiar name, is it not?) who improved the design in 1776. Then, Watt devised the method of comparing the power of his locomotive to the equivalent of how many horses to promote the power of his locomotive on a more relatable scale. Hence, horsepower.

Since then, this value has been adopted for rotary motion for trains and through the Industrial Revolution. Therefore, the value stuck for motorcycle and car engines.

Watt’s mechanical horsepower is defined as a horse lifting a 550lb. load 1 foot in 1 second, which equals 32,549 ft-lb of work per minute, or 4,500 kilogram-metres per minute.

Okay, so why Watt?

However, Europeans prefer to adhere to SI units or in other words, metric units. This is where the discrepancies creep up.

See, Imperial horsepower measures as 745.7 Watts, while the European SI metric horsepower unit also known as PS (Pferdestärke) or CV (Chevaux-Vapeur) is only 735.5 Watts.

This is why while some spec sheets pronounce an engine to produce 70 PS, it actually produces only 69 HP.

These different units i.e. mechanical HP, metric HP, PS, CV only created confusion to vehicle buyers, so in 1972, the kW replaced PS as the SI unit for engine power through EEC directives. But as of 1 January 2010, the EU only permits HP as a supplemental unit to kW.

How is kW calculated?

Kilowatt is a function of torque and revolutions per minute (RPM)  and is calculated as following: Power (kW) = torque (Nm) x speed (revolutions per minute, or RPM) / 9.5488.

The calculation is actually the same for horsepower: Power (HP) = torque (lb-ft) x speed (RPM) / 5,252.

However, to convert published kW to HP: Horsepower = 1 kW x 1.34. Thus, an engine which produces 12 kW of power equals 16.1 HP.

JSPT (Jabatan Siasatan dan Penguatkuasaan Trafik / Traffic Investigation and Enforcement Department) Bukit Aman is investigating the actions of an escort who stopped a truck in a dangerous manner.

The director of the department, Datuk Mohd Azman Ahmad Sapri said he was aware of the incident. “JSPT will investigate the incident and in terms of compliance with standard operating procedures,” he told Harian Metro.

The incident went viral after a 35-second clip believed to be a dashboard camera recording from the lorry was uploaded on social media.

The video shows a police escort suddenly swerving in front of a lorry and ordering the driver to stop immediately. The truck was able to stop but within a very close distance to the two motorcycles in front of it. The escort himself was also in danger should the truck’s brakes malfunction.

Every road user, what more trained enforcers such as traffic police, should be aware of the braking distances of other vehicles, especially for heavy vehicles such as trucks and buses. The weight of heavy vehicles produce very high momentum thus requiring a longer stopping distances. In addition, the driver may lose control of the vehicle when applying sudden braking.

Apart from that, drivers behind the bus or lorry may also be affected because they cannot see further ahead apart from the back of the bus or lorry. The driver behind has the potential to crash into the vehicle in front and cause a chain accident.

Police arrested nine motorcyclists on the Kuala Lumpur – Seremban Highway, last Sunday night. Seven of them were arrested for dangerous riding and performing “Superman” stunts, while the other two were arrested for altering the motorcycle’s registration number to confuse the authorities.

According to Bukit Aman Traffic Investigation and Enforcement Department Director, Datuk Mohd Azman Ahmad Sapri, the nine motorcycles are Yamaha Y15ZR, Yamaha 135 LC and Modenas Kris 110. All motorcycles have been confiscated for further action.

“The arrested persons were between 16 and 24 years old and they were taken to the IPD Seremban Traffic Police Station for further action. Legal action is carried out in accordance with Section 42 (1) of the Road Transport Act 1987 and Section 108 (3) (F) of the same act, ” he said.

Mohd Azman said those arrested were not involved with any motorcycle groups from nearby districts such as Port Dickson and Kuala Pilah. “Some of them came from several areas around the Klang Valley and only use this highway as a convoy route to go to eateries located around Senawang town.”

They were arrested while the authorities were carrying out Op Samseng Jalan (Road Hooligan Operations) at the Senawang Toll Plaza. A total of six officers and 68 personnel were involved in the operation from 4 pm to 4 am.

The police also issued 101 summonses for various offences. Among them such as the registration number does not follow the guidelines (5), no registration number (20), fancy registration number (1), imperfect accessories (12) and no side mirror (14).

Apart from that, other offences included not displaying P and L stickers (10), expired road tax (10), noisy exhaust (7), expired license (2), structural modification (1) no brakes (5) and the owner allows improper usage (1).

CFMoto has launched a racier version of the 450SR, called the CFMoto 450SR S.

It is powered by a 46.3bhp, 449.5cc parallel-twin engine with a 270-degree firing order (to mimic that of a 90-degree V-Twin). There are twin balancers to check engine vibes. Other features include those already on the 450SR such as winglets, and full colour TFT dash, but the main distinction here is a single-sided swingarm.

While sharing the same platform as the SR, updates to the new 450SR S further include an underslung exhaust, winglets, a bigger 240mm rear brake disc, and beefier 37mm upside down forks with damping adjustment. As with its sibling, that engine is installed in a Chro-Moly chassis which weighs just 11kg when combined with the subframe.

CFMoto claims a kerb weight of 179kg. The tank holds 14 litres of fuel, with the manufacturer claiming up nearly 300km of range.

Braking power is provided by Brembo on both ends, supported with ABS.

A five inch curved TFT dash allowing you to control the traction control, and mobile connectivity. There’s also automatic headlights and an ESS emergency braking feature, which flashes the rear stop light to alert other road users of hard deceleration.

Will the CFMoto 450SR S be heading to Malaysia? We hope so!

The Meteorological Department of Malaysia (MetMalaysia) has issued a heatwave warning. According to them, temperatures in 12 areas are expected to hit 37-deg Celsius, for at least 3 days in a row.

MetMalaysia, through a post in their Facebook page, said that those areas are in Perlis as well as Kedah. They include Pulau Langkawi, Kubang Pasu, Kota Setar, Pokok Sena, Pendang, Padang Terap Sik, Baling, and Kulim.

Other areas include Kuala Kangsar in Perak, and Beaufort in Sabah.

On another note, other areas are expected to hit a maximum of lower than 35-deg Celsius.

As such, do take precautions when you ride during a heatwave. Here are a few tips:


Dehydration will make you drowsy, and cause headahces and bodyaches. You will also start to lose focus when you ride. So, keep drinking water, fruit juices (without sugar), and isotonic drinks (with moderation). Stay away from carbonated soft drinks.

Wear the correct gear

Wear mesh jackets and ventilated riding pants. You will feel hot, granted, but there is at least some protection. Also, wear helmets that provide plenty of airflow such as for sport-touring if you prefer full-faces.

Cool off

If you are riding long distance, stop when you feel drowsy. Then wet your shirt and put it on to keep cool. Another method is by wetting your balaclava and putting it on. The cool air on your face will keep you awake. Similarly, you could also wet a piece of cloth or clothing and wrap it around your neck like a scarf.


Speaking about stopping, do stop as regularly as you need because insisting on riding while you are feeling drowsy is too dangerous. Take a short break, drink some water and eat some snacks that provide high energy. On the note of what to consume, stay away from spicy and greasy food.

QJMOTOR Malaysia has launched their newest scooter, the QJMOTOR LTR150.

Despite its retro classic shape, it is equipped with a single-cylinder, SOHC, 4-stroke, 149cc engine that is quite powerful. It produces 16.4hp (12.2kW) at 8,500 RPM and 14.8Nm at 6,500 RPM. (For comparison, the 150cc, SOHC, liquid-cooled Yamaha Y15ZR engine produces 15.1hp at 8,500 RPM and a maximum torque of 13.8Nm at 7,000 RPM). The engine’s power is sent to the rear wheel through a CVT transmission.

The chassis features a disc brake system with a large discs measuring 190mm at the front and 225mm at the back. A dual-channel (front and rear) anti-lock braking system (ABS) is a standard feature for rider safety.

The QJMOTOR LTR150’s seat is made for the rider and pillion’s comfort even if it is for long rides. The storage space under the seat is also very spacious enabling the rider to carry things with ease. There is also a USB charging socket in the front storage compartment.

Other features include an LCD digital meter display, LED lights, an Idling Stop system that turns off the engine when idling, and a 6.5 liter fuel tank.

QJMOTOR LTR150 is offered in three colors namely Lime Creme, Sky Blue, Mint Green and Carnation Park. It retails at RM8,888 (off-road) and is covered by a two-year or 20,000km warranty (whichever comes first). It is available at all authorised QJMOTOR dealers throughout Malaysia. BR


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