Hi Everybody. I'm new to the forum and very interested in the awesome Yamaha NVX 155, of which i don't know much about, as its not available in the country where i live.
I have some questions that hopefully can be answered.

First some facts...
As far as i know, the NVX is available in the following countries only....

Malaysia (NVX)
Thailand (Aerox)
Indonesia (Aerox)
Vietnam (NVX)
Philippines (Aerox)

The NVX 155 , NMAX , & YZF-R15, all share the same engine, yet power figures differ....

NVX 155
HP 11kw @ 8000rpm
Torque 13.8nm @ 6250

NMAX
HP 11.1kw @ 8000rpm
Torque 14.4nm @ 6000rpm

YZF-R15
HP 14.2kw @ 10000rpm
Torque 14.7nm @ 8500rpm

Questions....

1. Why did Yamaha choose to call it the NVX in Malaysia & Vietnam, and not call it the Aerox like the other countries? (It seems to me, that Aerox would have been better, as its a legendary name for Yamaha, and suits this bike more in my opinion, even for marketing purposes)

2. Why would Yamaha not tune the NVX up to at least the power figures of the NMAX or even up to the YZF-R15?
I understand the NVX is lighter then the NMAX, so its power to weight ratio is superior, meaning its actually faster then the NMAX, but why did they choose to not tune it to its maximum anyway, and make it as fast as possible?

3. In what way technically, do the engines differ, in order to achieve these different levels of power output?

I look forward to some insight and answers to my questions, to help relieve my curiosity. Much appreciated, and thanks in advance.

This post has been edited by benzina: Jan 24 2019, 02:25 PM

Found the answer to question 1. "NVX" was chosen over "Aerox", due to possible copyright issue of "Aerox" name in Malaysia and Vietnam.

Still would like some insight into questions 2 & 3.

Thanks, yes i gathered all the ways to make more power from the same engine, but lets just take Aerox 155 vs Nmax for example.....
1. Do you know precisely which of these components around the engine of the Nmax, that differs from the Aerox in order to give it that slightly more torque? (Perhaps only a Yamaha Technician could answer, but its worth a try)
2. And why would Yamaha choose not do this to the Aerox, to maximise the its potential?

This post has been edited by benzina: Mar 14 2019, 09:04 AM

That would make for an interesting exercise, comparing part numbers. I remember running a few engine part comparisons between Aerox & Nmax, but from what i checked, they ended up being the same.
I can imagine the R15 would throw up quite a few different parts though, and i may try and get around to comparing them....be interesting.

Wouldn't it be nice if Yamaha brought out a special super hot version of the Aerox, with R15 power & torque, and simply called it Yamaha Aerox R155

Have a listen to how good this 155 engine can sound onboard a standard R15 V3....
https://www.youtube.com/watch?v=c2H1rfaUTys&frags=pl%2Cwn

This post has been edited by benzina: Mar 14 2019, 08:46 PM

Can anyone find the 2017 - 2018 Yamaha YZF R15 V3 Parts Catalogue PDF ?
Must be 2017 - 2018.... cause i want to compare parts list on engines. Thanks.

EDIT....I found it....all good

This post has been edited by benzina: Mar 15 2019, 02:26 PM

Compared & found the following...

Aerox vs r15 engine part numbers

Valves (intake & Exhaust) - (Same)
Camshaft Assey - (Same)
Injector Assey - (Same)
Throttle body - (Same)
Decompression Assey - (Same)
Head - (Same)
Piston Assy - (Same)
Crankshaft Assy - (Same)

All above checked out to be the same part numbers. (Yet we know compression ratio, exhaust, ECU Mapping and gears are different, so perhaps the extra power % torque achieved, just centres around these)

This post has been edited by benzina: Mar 15 2019, 05:23 PM

I think the ECU tune mapping is the reason for the slight torque difference between the Aerox vs Nmax, as all else, including transmission, appear to use the same parts.

This post has been edited by benzina: Mar 15 2019, 09:04 PM

Yes i wasn't suggesting where the power figures are taken from, only going through several parts to check on any differences, as i wanted to see if they also changed the anything around the transmission to suit the power differences.

But here's a question..... would the transmission belt be in exactly the same position on the variator for each bike at peak torque? (Rollers are the same too...13g)

NVX 155
HP 11kw @ 8000rpm
Torque 13.8nm @ 6250

NMAX
HP 11.1kw @ 8000rpm
Torque 14.4nm @ 6000rpm

This post has been edited by benzina: Mar 16 2019, 09:04 AM

Can you elaborate on the digital panel, fork & bearing problems you have seen? I don't recall seeing these, and don't want to read the entire thread again.
My impression of the NVX's reliability from reading up on it, is thats its been super reliable, as Yamaha's usually are.

Basic on your criteria of what type of bike you need, i would think the NVX is the one to go for, plus its by far the best looking sports scooter in the world, in my humble opinion.

Keep in mind that many of the used NVX'S on Mudah are asking for NEW retail price and more in some cases....make what you will.
I think you will love the NVX, and it still is one of the fastest, if not the fastest stock standard automatic 155cc on the market anywhere, due to great power to weight ratio.

This post has been edited by benzina: May 8 2019, 08:40 AM

i agree....a stock standard NVX is GREAT straight out of the box, and all you need. Factory Yamaha know what they are doing, and do it very well, striking that perfect balance of performance and reliability.

This post has been edited by benzina: May 8 2019, 07:50 PM

Was watching the Thailand MotoGP time trials last night, and after Valentino Rossi's crash (He was O.K.), I saw him taken back to the pits by a Yamaha Aerox 155 MotoGP edition. Looked great, complete with replica livery graphics.

I remember the 2016 Sepang MotoGP unveiling of the NVX / AEROX GDR155 with Valentino Rossi....how appropriate this bike has been for this scene. I noticed they used the Petronas Yamaha Motogp livery on the NVX last year, for use in the Sepang Yamaha pit bikes....again, very appropriate for the Malaysian specific market, with Malaysia's own Hafizh Syahrin riding Petronas Yamaha.
What an awesome pit bike Yamaha has to use for their champion MotoGP riders, and show off to the world.
The others like Honda etc, have nothing special at all.
Yamaha was very smart creating this very special sports scooter for this segment, particularly since it mimics a sports super bike. Only the Gilera Runner and Derbi GP1 came close, and they don't make them anymore.
If Piaggio were smart (they own Aprilia, Gilera & Derbi), they would make a proper Aprilia SR150 to compare with the Yamaha Aerox 155. They have a SR150 made in India, but thats just a Piaggio Typhoon that is rebadged as Aprilia. Even Honda don't have a proper premium sports version of the PCX.
I'm surprised Yamaha has not started selling the Aerox 155 in Europe yet, as they would have the market all to themselves, for aspiring young sports scooter riders, who want the best sports 155cc in the world, and dream of being MotoGP riders.
I guess sooner or later, Yamaha will release it to Europe, after seeing how massively successful the Aerox has been going in the Asean markets. [SIZE=7][SIZE=7]

This post has been edited by benzina: Oct 6 2019, 01:12 PM

I understand the theory behind this view, electric will eventually be the future, but we are talking about the most advanced,most powerful, efficient and cleanest 155cc on the planet, and until the day Motogp goes electric, i think particularly, the Spanish & Italians would go crazy for this bike. Then they can also bring out an electric Aerox, or even hybrid versions later

This post has been edited by benzina: Oct 6 2019, 08:38 PM

Italy and Greece have both NMAX 125 & 155. And all other major euro country's i checked have the NMAX 125.
NMAX is a global model, and also sold here in Australia in top line form 155cc (Made in Indonesia)
Aerox 50cc has always been available in Europe for the young sports riders who can start from age 16 there. It has always gone up against the Aprilia SR50, Piaggio NRG Purejet, & Peugeot Speedfight.
This is another reason they are actually crying out for the Aerox 125 or 155, as it provides the next step up, and the ultimate sports scooter machine to own.
India too, has been crying out for it, and i believe it is about to be released there in the next few months.

On a side note, i test rode the NMAX 155, and found it to be more a cruiser machine with its sitting position, as apposed to the Aerox which is much more sports style riding position.
I also found something i did NOT like about the NMAX....I found it difficult to find the centre balance when going very slow crawling pace. It felt like it wanted to tip from one side or the other. IT was very strange, perhaps it was that low seat to higher handlebar arrangement that caused this issue i found with it, because i can't think of anything else.
Where as the Aerox and the Piaggio Liberty 150 have great low speed balance from my experience with them, and both have similar seat height to handlebar position.

This post has been edited by benzina: Oct 8 2019, 01:06 PM

And thanks for confirming this NMAX issue for my headspace too....as i thought it was just my imagination, but it's something i'll never forget.
I'm surprised more is not made of this in any reviews i've seen on the NMAX vs Aerox.
There has been only one youtube video review where i remember the guy mentioned it, and also one written review too.

This post has been edited by benzina: Oct 10 2019, 08:43 AM

The NVX 155 uses 5W globes for the auxiliary park lights and 10W globes for the amber turn signals.
I'm thinking of swapping these out for LED's.
Does anyone know the correct LED type for these?

From what i gather.....
Auxiliary lights - T10 (12V) 6000K LED
Turn signal lights - ?

I would use the brand OSRAM, so if anyone can confirm if the auxiliary light type mentioned above is correct, and also provide the type i need for the (AMBER) turn signals, that will be much appreciated. Thanks in advance.

This post has been edited by benzina: Dec 13 2019, 01:14 PM

O.K I've successfully changed my auxiliary park lights to LED, and they are fantastic!!! The stock ones made a yellowish light, where as these LED are COOL WHITE and match the LED headlights now, plus they are a bit brighter and only use 1W.

I'm going to leave the stock turn signal bulbs as they are, because i believe you have to change the relay as well....and i'm not prepared to do that.

This post has been edited by benzina: Dec 23 2019, 12:09 PM

See this article i found from a UK Website too....

https://scooterlab.uk/yamaha-aerox-125-europe-2018-news/

Its interesting how they come up with different graphics to suit each different ASEAN market region tastes. Apparently, Yamaha researched this.
After viewing all Aerox/NVX markets....Indonesia,Thailand,Vietnam,Philippines & Malaysia, i personally think Malaysia and the Philippines offer the best looking graphics.
I also think the first generation graphics were the simplest and best too.

Here is a link to information regarding Yamaha's GDR155 research and development into colours and graphics to suit different markets. You can view a clay model of the GDR155 here too.
https://global.yamaha-motor.com/showroom/cp...rchives/2017_1/

This post has been edited by benzina: Dec 30 2019, 09:06 PM

Looks like the Aerox and Nmax have a technological rival to match them now in the 2020 Piaggio Medley 125 & 155.

See this link...... https://transitmotorcycles.piaggiogroup.co....Medley-for-2020

Just on the engines alone, the 155 version has 12.1kw @8750rpm / 15nm @ 6500rpm
The 125 version has 11kw @9000rpm / 12nm @ 6500rpm.

They are a lot heavier though, so i think the Yamaha's would still win a drag race based on power to weight, but these Piaggio's are fully loaded with everything including ABS / Stop Start / LCD Dash etc etc. They are well engineered and high in quality too.

You can't beat the Aerox MotoGP bike styling, but if Aprilia did a scooter like the Aerox with the Piaggio 155 engine they have (Piaggio own Aprilia), then that really would be a competitor to the mighty Aerox.

This post has been edited by benzina: Feb 15 2020, 11:25 AM