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

NVX@Aerox and Nmax has same engine, but diff tuning and power output, due some differences.
- like the CVT is not 100% same as nmax. the belt, variator etc size also difference.
- weight difference. nvx more lighter than nmax
- nmax built mostly for city and touring use, due to bigger tank, comfortable seating position, where nvx suitable for city use due to sporty seating position and small tank like kapchai.

R15 is bit diff due to its manual transmission, the engine characteristic will be diff.
the engine cooling also much difff on R15 than nvx/nmax since the radiator is on right side, where R15 radioator at on front engine.

only yamaha knows the correct answer to your Qs.

but since u said they have the same engine, u can compare the part numbers, the parts tht can influence the output of engine.

like valves, cams, injectors, intake, head, etc..

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

the spec - power , torque- given by manufacturer is measured @ the crank.
so transmission is not involved.

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

Anyone can recommend a good deal for cash OTR for NVX in Klang Valley. The best i could get is 12k (from bike shop). Some going for 11.7k(3rd party dudes). Anywhere in Klang Valley would do. Thanx.

hi peeps,

i'm thinking of getting nvx to commute to work (70km to and fro, 40% traffic jam 60% highway). currently using vespa.

i'm contemplating on getting nvx or xmax, cos xmax seems to tick all the boxes except for the price of the bike which is a lot pricier compared to nvx and the size makes it a hassle in the jam.

appreciate comments from you guys. bare in mind that i will be using the bike for a long period (7 years at least) and i am not the type that change bike frequently.

my only concern on nvx is the reliability, as i saw a lot of fb comments on the issues faced by the owners (digital panel, fork, bearing etc.)

why not nmax?
same engine as nvx
price more cheaper.
bigger fuel tank
comfortable seating position.

digital panel u can change
fork n bearing u can change.
the most important things is the spare parts availability and easy to repair.
if u want to use it that long

xmax is good for long distance, but with higher price n maintenance

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.

if you can afford it, go for xmax
im nvx user, use for 30km from home to work and home again...
so far i never encounter any problem

i understand that nmax is more practical in all aspects. but i dont like the look of the bike. lol.

some of my friends are having those problem. digital panel is too sensitive, the digits are messed up (fading etc) due to park under the sun. in the fb group, some reported having the same issue eventhough they park indoor.

fork is too soft. this is minor issue that can be solved, but there are some in the group reported that their fork leaked at less than 10k mileage.

there's also reported cases on random vibration and humming (unknown reason) and broken bearing in less than 30k mileage.

these are all minor issues that can be solved, but for a bike of that price, i dont expect to have that kind of problems.

in my circle or friends, one is having issue with the digital panel, the other one with the fork. probably they received a lemon unit, idk.

glad to hear that yours have no issues. i guess i'll just gamble and hope for the best. trying my best not to spend on the xmax (servicing cost is almost the same, but monthly payment is a lot higher), but the poison after trying xmax is really effective lol.

This post has been edited by ZintanthraX: Mar 28 2019, 09:31 AM

servicing cost for xmax of cos higher than nvx/nmax.
the belt cost almost triple
the engine oil is more, and use oil filter.

i would say u need to spend double price than nvx/nmax for the maintenance.

it is more expensive but not by far. nvx belt is around rm70, xmax is rm120.

normal service is slightly more per service, but the interval is different if we go by the manual book. so if we were to compare for a total of 15000km, difference is acceptable (still below rm100).

but anyway, both service is okay to me cos my current vespa maintenance is a lot crazier than nvx and xmax.

forgot u using vespa now. if u can afford vespa maintenance, then of cos u can afford xmax maintenance cost.

for me 70km one way daily ride need higher cc scooter
you use highway right?
nvx max speed 110-120
wanna higher speed need use after market product,
slow on highway dangerous, mostly car drive above 110 anyway
if i work in peninsular, i will buy xmax instead i believe can go 160kmj
but i live in kuching
so no need higher cc scooter

yes and no. lol. and its 35km one way, 70km two way.

yes i use highway, but i'm using the motorcycle lane. so should be okay i guess.

This post has been edited by ZintanthraX: Mar 29 2019, 03:51 PM