Yamaha Aerox & Jog RR 50cc Malossi Tuning Guide
Categories: 50cc Tuning, Featured, General Tuning
Written By: admin
The Yamaha Aerox and the Jog RR are the flagship performance Yamaha scooters, both featuring the highly tuneable Minerelli LC 50cc engine which responds very well to tuning with Malossi products. Yamaha AC powered bikes like the Neos, BWS, Zuma and Jog R are also very similar, but do not make as much power as the LC models, but this guide still applies to them.
Extremely early Yamaha scooters (I know the original Billywhizz for instance) had a restricted CDI unit, as far as I’m aware the new ones do not anymore, and won’t need a replacement CDI unless you install really high revving / high power race 70cc kits, which I do not recommend doing for road use unless you like rebuilding your Yamaha scooter a lot. I’ve had a relatively high revving Hebo kit installed in a fairly new AC engine before combined with a Hebo exhaust and it ran fine without a replacement CDI.
1. Yamaha Scooter Tuning: Malossi Variator
I always prefer to start tuning Yamaha / Minerelli engine based scooters by replacing the Variator with a Malossi Variator to start with. This is because, in my opinion, the standard Variator isn’t the best unit in the world and it seems to cause bogging at 30mph and struggles to keep the engine spinning at its optimum rpm (where it makes peak power). Although the standard Variator is fine on normal derestricted Yamaha scooters, when you start tuning you tend to end up with a narrower power band (the region where your scooter makes the most power) and since the standard Variator struggles to keep the rpm from fluctuating outside this range, causing bogging, a replacement performance Malossi Variator should be fitted before anything else.
2. Yamaha Scooter Tuning: Giannelli Exhaust
As with nearly every Malossi tuning guide I’ve written, I fit Giannelli exhausts 99% of the time for 3 basic reasons:
Cost: Giannelli exhausts are available from £88 for the Giannelli Extra and £117 for the Giannelli Reverse. Giannelli exhausts might not be the cheapest on the market, but the cheapest isn’t the best and they are by far from the most expensive exhausts available.
Power: Giannelli are very well performing exhausts, Giannelli’s perform equally well on both standard 50cc cylinders and Malossi tuning 70cc big bore kits.
Warranty: Giannelli’s are e-marked and legal. Although hardly anyone cares about fitting “race use only” parts, the main benefit this actually gives you is the fact they come with a warranty, race use only parts do not.
3. Yamaha Scooter Tuning: Malossi Big Bore 70cc kit
As per usual, I always recommend fitting Malossi tuning 70cc big bore kits. Malossi make the best tuning parts on the market. The Malossi tuning cast iron 70cc big bore kit is £158 in the UK and is the best value for money road cylinder kit available in my opinion; it makes the best combination of power, price and reliability. Malossi tuning also produce the MHR Replica kit which is an alloy barrel and nickasil plated cylinder designed to be a road going replica of the super power MHR Team race kits (which make 18bhp+ but are only really suitable for race use as they require another £2000 or so of parts alongside it to run properly). The MHR Replica makes a little bit more power than the cast iron kit, but in my opinion, not enough to warrant buying one for a road scooter that does the miles. If a cast iron one blows up, you can just get these rebored and a new piston, if an alloy kit blows up you need new nickasil plating and a piston, which costs almost as much as a brand new kit.
I did mention I have used Hebo kits and exhausts in the past on these engines with some success, but I wouldn’t recommend using them because they’re all alloy/nickasil barrels with a single ring piston. This is great for high revving power (due to less friction on the cylinder) but not so good for reliability and you’ll need to replace the piston often compared to the Malossi big bore kits. When combined with the Hebo exhausts, these kits are really high revving and make bucket loads of power yes, but are in turn, more difficult to setup (unless you have a dynamometer in your back yard). Also, my biggest issue is Hebo UK are possibly the worst suppliers I’ve ever dealt with when working in the scooter industry, poor stock keeping and make too many false promises about deliveries, waiting 6 months for replacement cylinder kits is totally unacceptable in my opinion. They used to have a guy called Colin working there who was a genuine bloke 100% concerned about his customers, but after he parted ways with them, Hebo UK have gone downhill rather sharpish in my opinion.
















August 24th, 2008 at 12:58 pm
what is the bets exhust to get for my yamaha neos 50cc 03 plate.
August 25th, 2008 at 11:29 am
I am looking to tune my Aerox, I’ve had it deristricted and its just capable of 50mph.
I’m looking to stick a performance exahust on, one of the more expensive and reputable brands as described.
They don’t come with rollers and/or carb jets and rely on you to buy them seperately (obviously different combinations will tune it differently.
Only problem is I don’t know what the standard sizes are to get the best performance from it, I know I need lighter rollers and a bigger jet size for increased fuel flow but don’t know the ones that come as standard on the bike.
If anyone knows of the sizes that work well please shoot an email to me.
Ideally I’m looking for better top end speed, and an acceleration increase.
Thanks,
August 26th, 2008 at 11:26 am
i have a yamaha aeroz 05 plate had i derestricted and new rollers and sports exhaust but ever since i have had this done my acceleration has decreased does anyone know how i could get better acceleration out of my aerox thanks write in !
August 26th, 2008 at 12:19 pm
http://forums.tunemyscooter.com/
http://forums.tunemyscooter.com/
http://forums.tunemyscooter.com/
http://forums.tunemyscooter.com/
http://forums.tunemyscooter.com/
Just incase you’ve all missed the previous links on the page!
September 4th, 2008 at 9:38 am
best rollers 4 yamaha aerox are mallosi 4.2 grams or less heavy one’s are no good
October 1st, 2008 at 3:11 pm
yeah i got a yamaha neos and tuned it to fuck it does about 80 and is 50cc beat that I dare ya!!!!!!!!!!!!!!!!!!
October 8th, 2008 at 4:33 pm
iv got an aerox that does 87 mph on a flat, havent even put my 70cc bore kit in…yet! haha, think tht smashes ur neos bro
October 13th, 2008 at 7:18 pm
hey jeremy how du manage that /what with den
October 13th, 2008 at 7:33 pm
He’s taking the piss you retard lol
October 16th, 2008 at 12:29 pm
I can get 75 - 80 on a good day out of my aerox 50
Giannelli Reverse
Malossi MHR Variator
Malossi Delta Clutch 107mm
Speedline Race 28mm Carb
Malossi race crankshaft 12mm
Few more bits that dont make much difference
October 17th, 2008 at 4:01 am
I’m aussie my yamaha aeorx does around 100 km/h on flat.
October 18th, 2008 at 6:05 pm
u must be having a laugh! do you mean kmh ?
October 31st, 2008 at 8:55 pm
Hi I was wondering would a 21mm Carb be ok for Yamaha Aerox 50cc
November 7th, 2008 at 10:47 pm
If a Rox is tuned well ,they can go very hard,there are so many vids on youtube to prove that…I think they are still one of the best scooters to tune,very fast….
November 11th, 2008 at 7:26 pm
Hello.
In Denmark we have the best test with Malossi MHR Team Speed - My aerox does about 22 HP and its not optimated AT ALL. Just “plug ‘n play”.
A friend of mine have an Benelli K2 - allso with Aerox motor on it - it did danish record with great 36.xx HP (Team Speed and NOS)
Heres a link with my little racer: http://www.scootergalleri.dk/html/gal_visbil.asp?ID=196373&ipc=601464
But I’ve wonder to trade it for an Yamaha Jog RR (with allmost same parts) or an ZIP SP - caus I want to Join the Danish National League
November 11th, 2008 at 9:52 pm
i have a aerox that run 120 kmh here in Aruba
i have won a race with a banshee 1/4 mile and full mile