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Next generation NMAX 155 revealed

Yamaha’s new NMAX 155 has always offered sporty performance and outstanding economy. Now the Blue Core powered scooter features a new engine, frame and suspension combined with a premium electronics package for an even more sophisticated ride.

The new model is due to arrive in Australia in the third quarter of 2021. Colour options are Sword Grey, Icon Grey and Storm Grey. Pricing is not set yet.

The new MY22 NMAX 155 comes with a wide range of technological advancements, and so will inevitably be offered at a higher price than the existing model. You can rest assured that the existing NMAX 155 remains a great value proposition for scooter customers.

The new model features the following:

New Smart Motor Generator System 

To provide more environmentally friendly performance, NMAX 155 integrates control of the power unit’s electronic-related functions such as fuel delivery, engine starts/re-starts and power generation into a single part called the Starter Generator Control Unit (SGCU). The SGCU provides integrated control of the Smart Motor Generator System (for quiet engine starts) and the Stop & Start System (to reduce wasted fuel when waiting at traffic lights or other similar situations).

Quiet engine starts 
The Smart Motor Generator System enables quieter engine starts and re-starts. Until now, the motor for engine starting and the generator were separate parts, but this model uses a Starter Generator Assembly that combines the functions of both and is governed by the SGCU. 
During power generation the SGCU controls the switching of electric current and other functions based on vehicle conditions. Also, the SGCU’s control of electricity generation reduces energy loss during power generation. When starting the engine, the Starter Generator Assembly turns the crankshaft directly without having to drive it through gears, thus eliminating the sound of the meshing gears for quieter starts.

Yamaha’s new Stop & Start System contributes to reduced fuel consumption
This system automatically shuts off the engine when the machine is stopped and idling at traffic lights and the like to reduce wasted fuel. The SGCU provides precise engine control to make extremely quiet engine starts possible. Also, the SGCU monitors running conditions and inhibits unnecessarily frequent engine starts and stops in conditions such as congested traffic. To re-start the engine when stopped, the rider needs only to twist the throttle, causing the engine to quickly re-start and provide a smooth take-off. The Stop & Start System can be turned on or off as desired via a switch.

Variable Valve Actuation for exhilarating acceleration
The engine adopts a Variable Valve Actuation (VVA) system that contributes to linear acceleration characteristics and a pleasing feeling when accelerating. It works via a mechanism that shifts between two intake cam lobes, one for the low rev range and one for the mid to high rev range, with 6,000 rpm as the shifting point. The rocker arm shifting is actuated by a compact solenoid coil with sensitive response characteristics. This mutually complements the torque curve for excellent torque throughout the rev range. The settings for the intake and exhaust components as well as optimised fuel injection settings make the cam switch smooth without any abrupt feel.

New cylinder head, compact combustion chamber, bigger airbox and raised compression ratio
A liquid-cooled, 4-stroke SOHC, 155cc, single-cylinder, 4-valve fuel-injected engine with CVT is adopted. The bore x stroke of 58 mm × 58.7 mm delivers excellent power and torque characteristics.

This engine is a further development of the current NMAX’s liquid-cooled 4-valve fuel-injected unit and makes use of a new cylinder head and a compact combustion chamber to achieve a higher compression ratio. Where the current NMAX has a ratio of 10.5:1, this engine has a higher 11.6:1 ratio, thus boosting combustion efficiency. 

The intake valve is wider with a 20.5 mm diameter to ensure strong intake efficiency, the cylinder head also has an optimised coolant pathway to improve reliability, and the same spec lightweight forged piston as the YZF-R15 is employed.

Also, features like Variable Valve Actuation (VVA), a DiASil cylinder with excellent heat dissipation, an offset cylinder that reduces horsepower loss, a small-diameter crank pin and narrow conrod design are all carried over from the current model.

New frame design contributing to ride quality, onboard comfort and usability
To find the right balance for styling, ride performance and utility, a new lightweight, high-rigidity frame was designed and adopted for this model. The frame pairs together a 60.5 mm diameter main pipe, 45 mm diameter down tube and 1.6 mm thick reinforcement pieces.

The seating area is now wider to allow more freedom in the sitting position. The width of the footboards has also been increased by 5 mm over the current NMAX, providing additional freedom at the foot area. Also, reviewing the shape of the footboards has brought easy foot reach to the ground.

Optimised front rear suspension settings and ideal chassis rigidity
In finding the balance between the new engine and new frame, the front and rear suspension settings were optimised to achieve a pleasant and comfortable ride. The rear suspension in particular was fine-tuned with road tests and Kanno Hyoka (evaluating motorcycle performance based on test rider perceptions and feedback) through which the ideal balance of the spring constant and damping force was found. The rear helps provide a natural feel to the steering and flexible ride character and is preload adjustable. 
In addition, newly designed lightweight cast wheels are adopted at both the front and rear to reduce unsprung weight.

Smart Key system equipped
NMAX 155 uses a Smart Key System. If the rider has the Smart Key on their person, the machine detects its presence and allows the operations below to be performed with the main switch knob without needing to insert the key itself:
Turning power on or off
Engine starting/stopping - starting requires pulling in the brake lever and pushing the starter button
Handlebar lock release
Seat lock release
Fuel tank lid lock and release

Underseat storage space capable of holding an XL full face helmet
The underseat storage compartment offers a 23.3 L capacity with a space-efficient design that allows a full-face XL helmet to fit inside. The hinge that opens and closes the seat has two springs, so that after unlocking via an easy-to-access button, the seat opens slowly and naturally. It can also stay open by itself, making it simple to put in or take out items. There are also two helmet hangers on the outside part of the trunk liner that add even more convenience.

Easy-to-read full LCD instrument panel 
An easy-to-read full LCD instrument cluster shows remaining fuel, water temperature and the current time. It can also display an odometer, trip meter, fuel consumption (current and average), voltmeter and other data. A convenient lever-style switch on the left handlebar cycles through displayed data. Also, when stopped, a maintenance tripmeter can be displayed to show how long until the next oil change or V-belt change. 

Yamaha Connect enabled
Download the Yamaha Connect app to get more from your NMAX ownership. The app features a wide range of functions. For example, the LCD display can indicate your smartphone activity such as:

Meter indicator - Smartphone information like received calls, e-mails or text messages and remaining battery level can be displayed on the multi-function 
meter unit (instrument panel). Up to six different apps can be chosen and set for display. This feature also automatically adjusts the clock of the multi-function meter based on the time set on your smartphone.

RevsDashboard - The smartphone screen becomes a RevsDashboard displaying data like degree of throttle opening, engine rpm, rate of acceleration, an eco-friendly riding indicator and more.

Maintenance recommendation - Based on a variety of data like your motorcycle total mileage, ride frequency and average engine rpm levels, the app estimates the condition of the engine oil and provides recommendations for engine oil change timing within the range described in the owner's manual. You can also change the recommendation timing yourself. The app also takes into account data of battery voltage to gauge the condition of the battery and recommending if a check is required.

Fuel consumption - The app tracks your average mileage and displays it either by day or by month for easy viewing.

Malfunction notification - Should your motorcycle detect a malfunction, you will receive a notification via the app. In addition, you may designate a notice be sent that contains the location, time and other information to a designated third party, EG your Yamaha dealer, via e-mail.

Parking location - You can see where you last parked your motorcycle, a helpful feature when trying to find your motorcycle in large parking lots.

Ranking - You can share your mileage and ECO driving results with Yamaha users all over the world and enjoy them as a ranking.

New lighting design and function
Both front and rear lights are slightly raised upward to fit with the upright riding position and give the machine a light, nimble look. The design of the LED headlight — positioned approx. 14 mm higher than the current model — is reminiscent of car headlights with a dual light appearance and six LED bulbs in total for a bold look. The taillight is also 47 mm higher and gives the machine a nimbler look from the rear, while the light guides inside give it a unique appearance.

Other features and benefits include
7.1 litre fuel tank in the centre tunnel and fuel tank lid can be opened with an easily accessible button
Handy front pockets near the rider on both sides. Left pocket contains a12v socket for charging accessories while the right has a waterproof lid
Optimised front and rear disc brakes with improved rider feel
Dual channel ABS as standard with 230mmm front and rear discs Traction Control System equipped
Spacious ergonomics with plenty of legroom
• 13-inch wheels with 130-section rear tyre. Both tyres are tubeless