yamaha aerox

[nicolasjamie]

hi. i have a yamaha aerox. i have just bought a performance exhaust and had it deristricted. i was wondering is ther anything i need to do to make it run smoothly with a standard engine. i have heard a few things about upjetting but truthly i dont have a clue what this means

[map]

So you want to de-restrict?
You will not achieve much by just doing the exhaust.

If your scoot not previously hacked you probably need to look into changing the washer at the pulley (they're usually restricted here) and maybe change the rollers. That'll help the back wheel engine keep up with the engine. TBH don't know if you'll need a cdi change.

Sorry if the previous paragraph was a foreign language to you.

Try the search on here or failing that google.

However, as you don't know what a main jet is I'd back away from doing any mods yourself now and be prepared to pay money to someone who does know (not that they say they know or can bodge do the work, someone who actually knows).

...or just wait and get a bigger bike. Speed comes to those who can wait.


...or feel free to join the ranks of ped-boi enthusiasts. I understand there's a regualr meet at McDs (any McDs). Don't forget the uniform of trackies and trainers and learn to perch that helmet on top of your head.
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[wr6133]

Usually will be jetted lean for emissions if you have properly derestricted it and added a better flowing pipe you may need to alter it. You'll need to find the size of the stock one and then buy a range of larger ones (up to about 10% bigger and all in between). Then get testing (so you'll want a pile of clean plugs too).

A lot of effort for a few MPH as map said just wait till you can have something faster. You are throwing money at something slow to make it less slow but it'll still be stupidly slow. If you really absolutely must do it then get a big bore kit 72 or 80cc is going to do something marginally more meaningful and it's just as illegal as derestricting it anyway.

[nicolasjamie]

so really me putting on the new exhaust is not going to make to much difference. thanks for the advise tjhink im just gunna buy a better bike. cant see myself hanging around mcds to much tbh.

[c_dug]

To be fair the Aerox wasn't that slow a moped when done properly, you'd probably push 45-50mph out of one if it was done right.

I disagree to an extent about stepping back, we all learn somehow and I certainly knew diddly squat when I started out. Asking advice and knowing who's advice to trust are certainly a decent place to start though.

I'm far from an expert but I'll say this much. To run at it's best an engine has a fairly specific air:fuel ratio, this is basically achieved by balancing the airflow through the engine with the jetting of the carburettor (jets are basically small brass bolts with holes drilled through them in very specific sizes), or on modern engines with a fancy fuel injection system. If the air fuel mixture is wrong it can ultimately kill your engine.

By adding a sports exhaust you have changed how much air can flow through the engine. Assuming it now flows more air you need to allow more petrol in to maintain the correct ratio.

The supplier of the exhaust might be able to tell you the correct jetting, or maybe a scooter forum (though bare in mind what I said about knowing who's advice to trust), one way or another though you will probably want to change the jets.

The actual process of changing them is easy enough if you have access to some tools, and you'll learn a bit along the way too. Cross that bridge when you come to it though, find out what you need first.
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[map]

[nicolasjamie]

which jetting would you recommend. for a 50cc

[nicolasjamie]

which jetting would you recommend. for a 50cc

[wr6133]

[map]

[wr6133]

You'll want to check it has been derestricted properly as well. I don't know the exact restrictions on your ped but normally you will have a combination of

Electronic - CDI restricition. Either need a replacement or snip a wire

Gearing - The variator will have some kind of ring in there that stops it coming together properly. You'd need to take apart the variator (normally requires an impact gun) and if the ring is present remove it

Fueling - Can be done a few ways but the normal is a bit of extra plastic that stops the carb needle moving fully.

Exhaust - You got that covered

That's just what I've come across doing the ped my wife uses and a few neighbours GY6 based ones. You need to get on google and see if the aerox has any of those or any others.

Once it is derestricted properly you need to get it tuned in right. Part of that is getting the jetting spot on but also the roller weights may need changing (google what they are and what they do).

Now if you are going to go to the trouble of doing all that I'd say buy this and whack it on after you remove all restrictions but before you get it tuned in https://www.ebay.co.uk/itm/Yamaha-Aerox-50cc-Cat-03-11-70cc-Big-Bore-Cylinder-Piston-Gasket-Kit-/400789929688?pt=UK_Motorcycle_Parts&hash=item5d50f0fed8 (this will need rejetting and new roller weights).

[Andy_Pagin]

Afterwards remember to inform the DVLA that you've converted it from a Moped to a Motorcycle, tell your insurance company the same, check your licence permits you to ride motorcycles and get a motorcycle MOT if it's old enough to require one.
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Yamaha Vity -> YBR125 -> FZS600 Fazer -> FZ1-S Fazer

[nicolasjamie]

how do i find the standard rollers size and what to change them too

[evoboy]

Telling us what exhaust it is will help...

To go faster on a scooter you need to spend money.

The more you spend the faster it goes.

Is it a Liquid Cooled Aerox or an Air Cooled one with a fan?

The 3 best things you can do to a standard Minarelli engine after de restricting the variator by removing the washer ( this is the only restriction it has) are;

-Sports exhaust.
-17.5mm carb as the standard 12mm one will choke it.
-Setting up the gearbox correctly.

You should see a good 50-60mph ( depending on your weight ).
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Suzuki GT250 x7------- Fazer 600------CB250RS------Aprilia Rally 70----- Bandit 600

APT Motorcycles

[nicolasjamie]

which jetting would you recommend. for a 50cc

[nicolasjamie]

its a tecnigas q-tre exhaust. its also liquid cooled

[c_dug]

This one?: https://www.adrenalin-pedstop.co.uk/p-Tecnigas_QTre_exhaust_system_for_Aerox_Nitro_50_etc-5599.aspx

Might be worth emailing the company in the link for more specialist advice, they only mention needed lighter rollers so it may be that it is designed for the standard jetting.
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[c_dug]

Or Technigas directly: info@tecnigas.com
____________________
I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[evoboy]

[Old_Steeve]

First of all at 16 years old moped level I fail to see a better scoot on the market for the money. True you could get a sports moped of italian exotica with the same basic malossi engine and gear and spend an awful lot more on not going any faster.

I have been riding bikes 30+ years and have owned many bikes from the first footings on a FSIE via superbikes like an RGS Corsa, Aprillias, Ducatis and GSXR's and virtually every type of bike you could name over this period. I currently own an Aerox 50 as well as a few other more accepted sportsbikes. Why? Because racing round rural somerset on a radically tuned 70cc moped is a surprisingly fun alternative type of motorcycling. The Minarelli engine is superb, the handling and ridiculously low weight as entertaining as it gets in a lot of ways.

Anyway, the aerox is restricted in the exhaust (check) and the variator only (undo, remove washer and bingo). There is no inbuilt restriction in the carb or cdi although they both benefit from a little bit of fettling.

To get maximum benefit from the pipe you will need a big bore kit, and air filter and before you know it over 10 bhp will be winging through those silly little (corsa shod I hope) wheels and you will be grinning like a cheshire cat on your microlight aerox. Power to weight and therefore acceleration even exceeds the limits for a 125 though top speed will be slower.

My personal favourite resource for all things Aerox is the ridiculously informative ped parts website. Various set ups are explained on there with tutorial guides and how tos. They are also ultra helpful by phone as well. Depending where you are also you can save a lot of trial and error by booking a session on their dyno especially for carb issues and optimising roller weights. This sounds like a plug and it really isn't but they are simply the best I have found for Minarellis by some margin.

You can have tremendous fun on an Aerox, tuning them is a fantastic introduction to learning the mechanical side of motorbikes and mistakes are relatively cheap to correct. As I said mine is a bit over the top and the last dyno run shows 17bhp and it's geared for about 85mph but the look on some peoples faces when they are putting far more effort than expected to keep with a moped on their "proper"bikes or the face of a copper when the helmet comes off and a diminutive 50 year old is grinning back at them is priceless.

Edited for malapropisms

[_Iain_]

At a guess,

58-64 main jet, 4.5gr 15x12 rollers & expect an indicated 55-60ish mph. See how it goes on a 64 & a 62 though, as a lot of peds seem to run pretty sweet on one or the other and opt for 4.75gr rollers if you're fat.

Unsure why people seem to think that doubling a vehicles top speed for £75 + an hours work is a complete waste of time & money.

Also worth giving Adrenalin Pedstop a call - they're pretty shit hot & have some tables whereby you tell them what your bike is, how much you weigh etc and they'll tell you what jets need to be fitted & what rollers you ought to run. They've helped me a lot in the past with customers having setup issues.

01226 630020

https://www.adrenalin-pedstop.co.uk/

Edit;

As for what is upjetting.

https://www.yamahamotorcyclespares.co.uk/spares/epcimages/9088/8.jpg

Replacing part number 21 for another one with a bigger hole in it to allow more fuel through.

Part no.21 is called a"Main Jet" and looks like this;

https://www.adrenalin-pedstop.co.uk/upload/products/236ecfff-133d-4aff-9d55-0b6861170dc0.jpg

If you don't upjet you will suffer loss of power, overheating, and in some cases engine seizure/holes in the piston. Not something you want to happen.
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Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[Old_Steeve]

[_Iain_]

It does make me chuckle.
____________________
Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340