Yasuni R vs. Stage 6 Pro Replica *MKII* - What is the difference? PT2

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In this video we compare and discuss the differences between the Yasuni R, Yasuni Z and new Stage 6 Pro Replica MKII exhausts - and what these differences mean for performance.

[@YouCantSawSawdust]

More videos please,Scooter Street. They're always awesome and informative.

[@scooterstreetau]

Thank you, we are returning from Summer break very soon, more videos coming.

[@insoninenine8749]

We need a sports exhaust with touring sound, ie. a huge, silent muffler utilising the newest technology. Why is nobody making this? Would sell like hot cakes. Yasuni R is great, but unchanged for like 15-20 years since it came out. Wish they would do an update using the newest technology - super silent and improved corrosion-resistance (coating and/or stainless steel version) plus an even sleeker style option etc.

[@scooterstreetau]

Yes that would be a fun addition. Time to do a home job on your exhaust. Many of the engine have remained the same so the exhaust which is already defined for the models. More development would possibly push the price up on the cost of these new designs..

[@pubbiehive]

Leovince Touring, Sito Plus, etc.

[@exgtt2061]

General rule of thumb - the more welds rings, better the pipe. Cheap pipes are plain pressed steel, welded up the spine, top end pipes are like Zebras.

[@scooterstreetau]

We love Zebras, Thank you🦓👍

[@mikavanraamsdonk2933]

I know that the yasuni has 2 restrictors. Because it also has one in the silencer. Does the stage 6 also have 2 restrictors?

[@scooterstreetau]

Yes I believe so.

[@matthewnorris203]

Dyno testing is really the only way to check between these pipes.

[@scooterstreetau]

Absolutely true! It has been done, check out the performance exhaust comparison video on YT.

[@chad3390]

​@@scooterstreetau Hi where can i find exhaust comparison?

[@scooterstreetau]

@@chad3390 Search for it on KZbin, I did see one many years ago.

[@bendziwithazip]

I bought an Yasuni R for my piaggio zip 2000 50cc Do you know whats the best roller weights,Clutch springies and contra spring for it?

[@scooterstreetau]

Trial several different weights, you might have good luck with the 6.1g. Use a Polini adjustable clutch and the second notch. Contra, Green Malossi.

[@arnoldkul3827]

Hey friend I am setting up an Aprilia SR50 Stealth with the Minarelli Horizontal engine LC and Malossi Sport 70cc cylinder kit. And my question is would you recommend the Yasuni R, or is it better to run the Z with this particular cylinder. The previous exhaust was the Gianelli Extra V2, a basic 50cc exhaust when it was stock?

[@scooterstreetau]

I would use the R or higher class, the LC engine is of higher capabilities.

[@modestas-jb1wu]

Which exaust better for malossi sport 70cc Piaggio LC. yasuni z,r or stage 6 pro replica mk 2

[@scooterstreetau]

@@modestas-jb1wu Yasuni R.

[@St4roverov]

do you think yasuni r will go well with Stage6 MK2 racing?

[@scooterstreetau]

Yes🙌

[@tim0358]

no take a c16 a R is to low end for that cylinder

[@scooterstreetau]

@@tim0358Yes better performance👍 Just another noise level.

[@levivannieuwenhoven176]

so maybe the yasuni r is higher performance, but the performance lays at higher rmp. for example if you have a unrestricted 50cc 2 stroke scooter and you want the most tourque from 0 to like 30 kmph. is the yasuni r or the stage 6 the best?

[@scooterstreetau]

The low down power is best when the header ipe is narrow and has a slow taper to the chamber.

[@markov459]

Hello im considering on getting a yasuni R but alot of people ars telling me the yasuni Z is a better fit for my gilera runner 50cc 2012. Is the Z really better for a gilera or should i go for the R

[@scooterstreetau]

Only my opinion! "Z" is better for 50cc.

[@exgtt2061]

Buy the R, the Z is good with a 50cc cyl. Which you will get bored of.

[@ys.7710]

Which exhaust to you recommend for the Peugeot speedfight 2(2005)?

[@scooterstreetau]

LC or AC?

[@ys.7710]

@@scooterstreetau ac i think

[@scooterstreetau]

@@ys.7710 For the Air cooled SPF 2 try the Yasuni Z. Great for 50cc and is relative to handle a 70cc sport kit.

[@pubbiehive]

If you look at how the expansion chamber is shaped (the most important part), the MkII has a similar shape to the Z, rather than the R. Also, if you cut a Yasuni R apart there are some secrets within.

[@scooterstreetau]

Cheers👍

[@euphoriatrance9911]

What secrets you mean?

[@pubbiehive]

@@euphoriatrance9911 Hard to explain, but the design is quite special compared to other pipes.

[@HarmAngeloDeVegt]

What is the difference between Polini scooter team 4 and the Polini 4 race exhaust

[@scooterstreetau]

We have not used them sorry.

[@insoninenine8749]

@Scooter Street Have you tried the Polini CP/CP Evolution carburetor? What is your opinion of it, would it be an upgrade compared to a stock 17.5mm DellOrto of the same size?

[@scooterstreetau]

Have not had one yet, I like the idea and cannot wait to get in our hands.

[@insoninenine8749]

@@scooterstreetau Yes, an upgrade to the carb/fuel supply system is long needed. I'm surprised the market for retrofitting old scooters with newer carb technology or EFI systems hasn't been exploited more (like there is for the GY6 for example, an EFI kit where you can adjust the fuel delivery at every 500rpm). There must be hundreds of thousands of Piaggio 2T motors running in Europe and elsewhere, constituting a potential market. It's been about 18 years since the Ditech motor came out, which I think failed because of lack of information on how to tune and repair it at the time, which I think would be much easier today with youtube and such. But it had significantly lower fuel consumption, much less smog and smell due to significantly lower oil usage, yet great tuneability if you added a fuel pressure regulator to it (imagine what an adjustable ECU/EFI could do). I know that newer 2T engines have some electronic carb control, but I don't know anything about it, like how much more efficient it is. There is the smartcarb/lectron alternative, but they are extremely expensive (4-500usd) and only make 25mm and up. Would be great if the Polini CP / CP evolution at least made a noticeable upgrade from the old DellOrto carbs, but there is suprisingly no depth reviews that i can find.

[@Tiki-m8p]

Hello! one question..can I install a yasuni r on my yamaha aerox scooter year 2010?..the cylinder is all original except that now I will change the cvt transmission, maybe a Malossi clutch and a variomat 70 intake nozzle.will the engine work normally?

[@scooterstreetau]

It will operate if tuned correctly.

[@youtubeslof8512]

Hi, do you know my leovince tt screws for the fitment dont go tight?

[@scooterstreetau]

Use washers to space out the bolts.

[@kavenskas]

Hello , Should i get stage 6 pro rep mk1 or yasuni r with 70cc stage 6 streetrace? Also what jet should i use if i currently have 65?

[@scooterstreetau]

The Mark1 is a good option if it is still available..

[@moritz3765]

So what is better performance r or stage 6 mk 2 for streetrace stage 6

[@scooterstreetau]

MK2 is current MK1 no longer available. Yasuni R slightly better than MK2

[@moritz3765]

@scooterstreetau so the jasuni c10 is better then all stage 6 auspuff

[@scooterstreetau]

@@moritz3765 No, Stage6 have some of the most top performing exhausts

[@moritz3765]

​@@scooterstreetau but i mean c10 vs the mk2 replica ?

[@moritz3765]

@@scooterstreetau so the jasuni c10 is not better than the mk2 replica

[@nakkileipa]

Which one should i get for my 50cc peugeot speedfight 2

[@scooterstreetau]

Yasuni R.

[@ashitoshramdien2588]

jog with 70cc malossi kit with yasuni r is it good

[@scooterstreetau]

Hey there JP , please tell us more, 😃🤗

[@MrJanka64]

I have to modify a 2011 piaggio liberty. I would have thought about dr evo 70cc, yasuni R, pinasco ovredrive variator. with original carburettor dell'orto 17.5 which jet I have to mount (with malossi red sponge filter). do i need to change the contrast spring, clutch springs and rollers? with what? if you can also recommend a strap. Sorry for the many questions and thank you so much!

[@scooterstreetau]

Yes, you need the Clutch or clutch springs, you need the rollers or the variator will be fine and you will need a special belt. For the carby you need jet kit.

[@MrJanka64]

@@scooterstreetau OK thank you

[@DennisSpecial]

👍👍👍👍

[@kristupas5009]

Hello, if it put on the stage6 mk2 on a piaggio nrg euro4, should i upjet it?

[@scooterstreetau]

Are these self mapping with an ECU and Lambda sensor to the exhaust? What does the exhaust manufacturer instructions advise for this one?

[@mirafiorimotorsport5678]

Hello i have aprilia sr (piaggio engine),with dr evo and dellorto 17,5.Now i bought yasuni r wich main jet put on the carb?

[@scooterstreetau]

What is the jet you have now with the EVO?

[@mirafiorimotorsport5678]

@@scooterstreetau 75

[@scooterstreetau]

@@mirafiorimotorsport5678 bring the jet up to 86-88 with the exhaust, it maybe rich but best to start here, and work down..

[@aliasniemand1508]

Which exhaust for my speedfight lc? Which exhaust for my 50ccm polini aerox?

[@scooterstreetau]

Go for the highest Matching exhaust for the Cylinder kit that you have. If you have STG 6 go for Stg6 exhaust, I use the Yasuni as it suits my requirements for fast acceleration on street riding.

[@dalefehring9537]

I have piaggio 50cc 2t hyper 2 engine AC with 17.5 carb , stage 6 50cc street race cylinder , malossi variator and malossi wild lion exhaust , is there better exhaust I can put on , Yassuni Z or Yasuni R .

[@scooterstreetau]

The Z will work very well, The R is favoured when running a 70cc kit.

[@exgtt2061]

Buy the R, then you are somewhat future proofed. The Z is limited. Saves money. In the future you could use mid race 70 with a 21mm carb and the R. The Z you will throw away once you get bored with 50cc and 17.5mm carb.

[@ketty5255]

Hello Mate! I recently bought Aprilia SR50 2020 , what exhaust do you recommend me for stock 50cc engine ? Yasuni R , Stage 6 Mk2 or something else ?

[@scooterstreetau]

When you say SR50, which SR50? SRMT? SR50R? We recently fitted a Tecnigas Triops to an SR50R 2016. The response and performance really is amazing, the water cooled engine unleashed it power from the little piston. A lot will depend on how far you want to go with the modifications, Yasuni R will live best with a 70kit but can be fitted to the standard 50 engine with carby and transmission mods.

[@ketty5255]

Thanks for the reply, model is SR50R 2020 beside tecnigas what other exhaust u recommend ?

[@scooterstreetau]

@@ketty5255 Yasuni or any other exhaust from a company near you. If you choose to stay at 50cc don't go too high in the exhaust class, YasR, Tech Triops will be fine. You need to disconnect the black/white wire on the ECU and fit lighter rollers, around 5.5 gram also the clutch spring set will give that low down power. You must change the main jet..

[@ketty5255]

Thank you very much 👍

[@scooterstreetau]

@@ketty5255 Thanks for your support.

[@ipman3800]

my Pro rep mk1 is a lil bit damaged..i think thats why i only hit 80kmh max...so i was thinking about getting a new one, to see if there a diffrence, but then i saw that there is a mk2 and ppl talk about the yasuni r being better....what should i go with? Setup: Yamaha Aerox: Stage6 streetrace 70cc Stage6 hpc 17,5 Dellorto original Filter "tuned" and with Malossi redsponge Stage 6 pro Vario Stage 6 clutchbell and torque control Top Performance Belt

[@scooterstreetau]

It looks like you are a fan of the stage 6 parts so you won't go wrong with the STG6 MKII. If it is in your budget and you want an upgrade go for the Yasuni R or City 16.

[@ipman3800]

@@scooterstreetau so you saying the Yasuni R is basically better?? then i would def go for that...ehm im not rly a Fan Fan of stage 6, it was just the setup i was seeing by others and i liked the numbers they were getting....so now i have to buy a new one, and it feels weird to just by the same exhaust again...but i was scared the yasuni R isnt as good or just doesnt work good with the stage 6 70cc Streetrace

[@scooterstreetau]

@@ipman3800 Yes the R is my choice. ok not a fan, got it👍. The Yasuni is a great product, read some reviews and know you won't be wasting the money..

[@ipman3800]

@@scooterstreetau thank you very much my man

[@nickritter1992]

Just bought the pro rep, didn't even fit my scoot. Was about a half inch off on the flange. Bought the yasuni instead

[@jumbo6425]

Whats is batter giannelli silensers an stage 6 pro replika?

[@scooterstreetau]

Each of these brands has a specific set up where which the exhaust will work best, I always liked the Giannelli Reverse on a Minarelli engine, and the Stage6 Pro Rep on a Piaggio Hyper 2. The Giannelli has several exhaust in their range and each has a rev rating, so higher class cylinder will be better suited to higher class exhausts.

[@jumbo6425]

@@scooterstreetau yeah, thanks for education broo❤️

[@scooterstreetau]

@@jumbo6425 Shweeeet.

[@satamnn]

What is better for yamaha aerox stage 6

[@scooterstreetau]

Yasuni R or Higher.

[@elieltormi1212]

Sick video! I have Yamaha Aerox with 70cc stage6 streetrace, aliexpress 21pwk, stage6 sport pro variator, stage6 mk2 torque control clutch and polini speed bell, what exhaust would be overall best for wheelie and high speed?

[@valtslp7443]

get a dellorto carb, but you dont need 70cc to wheelie an aerox.

[@elkku552]

@@valtslp7443 I know but it makes it easier I think, what is the difference in pwk and dellorto?

[@scooterstreetau]

From our experience, generally speaking a smaller carb is better for torque, which will get you that really aggressive power-wheelie popping torque off the line. Larger carbs are better for top end obviously. In regards to exhaust, probably the Yasuni R.. But we're not talking huge differences here.

[@scooterstreetau]

@@valtslp7443 Dellorto is the one👍

[@YouCantSawSawdust]

@@valtslp7443 I'm shit at wheelies. Wish it wasn't so.

[@dav_id3961]

R for 70 cc arisal ? Is ok?

[@scooterstreetau]

Yes is good.

[@CliveSwabs]

Can these Yasuni pipes handle 80cc?

[@scooterstreetau]

Which 80cc cylinder kit specifically? Which scooter engine are you reffering too?

[@CliveSwabs]

@@scooterstreetau its for an 80cc motorcycle Suzuki RG80 Gamma 10hp

[@scooterstreetau]

@@CliveSwabs www.rrd-preparation.com/en/complete-exhaust-for-80cc-2-stroke-motorcycle/11395-exhaust-giannelli-suzuki-rg-gamma-80cc-2-stroke-1985-2001.html

[@paulbudford]

That's very interesting. Someone needs to dyno one. 😉

[@scooterstreetau]

Yes, that would be perfect..

[@lametraserillos1]

the stage 6 is a yasuni z without 2 welds on rear cone ... is like a yasuni r2 /bidalot smr (for derbis or minarelli engines) jeje both are from spain, im spanish ...

[@scooterstreetau]

Yes we thought that to be true👍👍

[@lostinspace2899]

Wrong. A Z doesnt run well at 11k rpm which the replica mk2 does very well. The replica mk2 is more like an yasuni R.

[@delahayenator]

If im not mistaken the Stage6 exhausts are made by Yasuni. The Stage6 cylinders are made by Athena.

[@Ropdnf]

80% of people who knows about motorcycles says yasuni R is not for 50cc engine,is stage6 pro replika mk2 good for stock 50cc engine or its same like yasuni R just for 70cc? I dont understand english ass well and thats why im asking...Thanks mate 😊

[@scooterstreetau]

Yasuni R is best for 70kit Yes. However, we have used Yasuni R and similar class of exhaust on the 50cc and it has a good result, but assure the rollers and transmission is set up to allow the RPM increase. Don't be worried to trial different modifications in an attempt to increase your knowledge and the performance changes✌

[@CliveSwabs]

Can they handle 80cc? Ive a Suzuki RG 80 im converting​@@scooterstreetau

[@scooterstreetau]

@@CliveSwabs Use an exhaust that is proven for the RG80.

[@CliveSwabs]

@@scooterstreetau there is none

[@scooterstreetau]

@@CliveSwabs Ahh damn, time to copy and create👍👍

[@TEAMVISKAT81]

yasuni is the best... stage 6 exhaust suck ass, had the stage 6 pro rep, hands down the worst exhaust ever :D

[@scooterstreetau]

Yas we are big fans of the Yasuni. Great product with excellent performance. Which Yasuni do you run now?

[@landmonkey22]

Probably made by arrow or leovince they make pretty much everything i think..

[@scooterstreetau]

Yasuni is from Spain. Yes Arrow and Giannelli merged into Arrow Co. 👍 Can we find out for sure....?

[@landmonkey22]

@@scooterstreetau love the quality of the yasunis, dont think we will ever know for sure, I think polini makes most pf their own stuff, except for the Original, like the wild lion from malossi that are just gg's

[@lostinspace2899]

Sounds like you dont like the mk2 or dont even give it a chance. You even say the Yasuni R will give you more performance without even have done any tests with results lol

[@scooterstreetau]

We certainly do like the MK2, (which is essentially a Yasuni Z) we are big fans of Stage 6, and the styling of their product range. If you want to buy the MK2 exhaust, I recommend it to you.

[@lostinspace2899]

Do you guys have a test bench? Would be nice to compare these 3 exhausts. I already own the replica mk2 with an sport pro mk2 @ 11.000 rpm.

[@scooterstreetau]

@@lostinspace2899 No we don't, we do not do any racing anymore and we tend to do only street riding now days.

[@theo2522]

Hi I have a problem with my sr 50, I just fitted some lighter rollers(mix between 3 original and 3 4,8g) the first test run it topped out at 75 km/h but when driving it the day after it only topped out at 70 and when giving it full gas it feels like it’s choking it self or like driving in honey, also when driving at a decline it pops in the exhaust and drives very choppy.

[@scooterstreetau]

HI Theo2, I have no idea what other upgrades you have on the Scooter so I can only address the information given. Firstly the rollers are too light, I would recommend move the weight up to 6.5 gram and then reducing the weight if necessary. Do the pen mark for belt topping position. Secondly, check the spark plug is it blackened? If so you may have a fuelling or low spark issue. Good luck👍

[@theo2522]

@@scooterstreetau are you sure about 6.5g? If I’m not wrong the factory ones somewhere between 5,4 and 6g. And the 4,8g came with my Leo Vince pipe. (I got the 2019 euro 4 model) I have done the pen mark and it almost erased all of it.

[@scooterstreetau]

@@theo2522 Yes start with 6.5 gram rollers and then reducing the weight if necessary. The stock comes with 7.5 gram from factory. Ok so you have a Leo Vince exhaust. So you must fit Clutch springs and also change the main jet. The engine Computer ECU can also be modified to give the ability to tune the carby.. Great, the belt is going all the way so now follow the above and get tuning..

[@theo2522]

@@scooterstreetau oh okay thanks. Is the ability to tune the carb from the ecu only for the ditech models, if not how do I do it on a carb model? Also is it worth getting the malossi cdi for this setup? Thanks for the help btw I really appreciate it

[@scooterstreetau]

@@theo2522 Yes, the ECU for this model is available from Malossi, this is the best way to go! Also check the transmission for the restricting spacer (hub) shaft in the variator. Forget the Ditech for now as it is Fuel injected and tuning from the ecu is only adjusting the mapping, not important for your model. We have a video that goes through the ECU on the Aprilia which has the same system as yours. Watch this - kzbin.info/www/bejne/o6GVqGNribtmjMk&ab_channel=ScooterStreet it will give you a general idea on how the system works.

[@mftuning2891]

Idon't know why you say bushes. I don't see any in the video......

[@scooterstreetau]

They are inserted into the mounting where the engine mount bracket connects to the body of the exhaust. ( Difficult to see)