Installing a Yasuni exhaust on a Yamaha scooter

[@therealboofighter]

Check out this video. kzbin.info/www/bejne/poibkKdpa9xrrtE

[@therealboofighter]

14:00 for the new sound!

[@matroy3573]

New pipe, new jet.. You need to jet your scooter because you have now a different amount of air exit

[@user-zt2cc7qq9b]

That's what I was thinking.

[@therealboofighter]

The jet is the small port or orifice that the fuel flows through into the carburetor. The larger the jet the bigger the hole. That means more fuel. They are all very small and going up one size is hard to tell by the naked eye. You have to rely on the numbers stamped on them.

[@therealboofighter]

That I have no idea.

[@therealboofighter]

@Rodrigo Lebedyev Pilguk I got all my parts from Scootertuning.ca tell them you saw them on my channel.

[@fluzzz1545]

what size jet do you get with a new pipe

[@mh2378g]

Thanks, great vid. I am planning to do the same to my RoughHouse 50R.

[@therealboofighter]

Nice.

[@dutch2smoked927]

HP LOGIC FOR THE WIN !!! so cool that you did this via jack :D but order a liquid cooled dubbel disk block so that you have disk brake in the back as wel

[@therealboofighter]

I don’t think I will go that far just yet.

[@dutch2smoked927]

@@therealboofighter aaah thats to bad :(

[@alvarogvdltgarcia52]

The yasuni Z for your information is a replacement for the original exhaust, with which the performance is somewhat or not at all improved as the inside is limited with a partition wall. In other words, it's just an appearance, but it doesn't give any performance. The best for a factory 50cc bike is the voca sabotage or yasuni r/carrera 10.

[@loganhubbard3177]

Removing the packing in this exhaust is shown to improve hp from factory. Correct ?

[@MrBoomBastic656]

Now do you have to remove those welds

[@davybondohome8460]

I went through all the same stuff fixed with 92 main and 46 pilot

[@therealboofighter]

Thank you for the info. Hopefully it will help others.

[@123edwardzpad]

Have you removed the 2nd restrictor in the silencer tip . That 1 requires no grinding, just screws. This is a really good video also. I watched you installl 70cc kit without removing the engine. Good stuff!

[@therealboofighter]

There was no 2nd restricted in the exhaust that I could find.

[@iamdustinhunter]

Now that you've had it for awhile do you find the sound of the new pipe too much? A friend went aftermarket and you can hear him a mile away. Debating OEM versus this.

[@knowledgeispower17]

There is a restricion in the silencer also. ;-)

[@therealboofighter]

I did not know that! I will have to look.

[@knowledgeispower17]

@@therealboofighter Watch this video: kzbin.info/www/bejne/pKCrgp6ki6ipbZI

[@therealboofighter]

Will do.

[@therealboofighter]

I wonder I could just drill that out?

[@knowledgeispower17]

@@therealboofighter Just cut the two welds from the side and it would came out just as it did on the other side. kzbin.info/www/bejne/joHXh5mjjpZ0lZI

[@dutch2smoked927]

ps if you lost power put in lighter rollers and better clutch springs the little ones and a better big one to

[@therealboofighter]

Thanks. I will try this.

[@dutch2smoked927]

@@therealboofighter yeah no problem also you can fine tune the carb after doing this

[@therealboofighter]

headz yeah, I have tried playing around with the jets. I have another video on that.

[@jeremybeaulieu4103]

Just put the right jet

[@kristijanmeglic3039]

I have the same exhaust and engine and when I installed a new exhaust on the engine it went max 20km/h, maybe you know why you removed the muffler or what it affects, I would like an answer 😢😢😢😢😢😢😢

[@mattalger2325]

You need to rejet the carburetor and usually install new roller weights in the variator any time you add a pipe with a chamber like the Yashuni. The bike may feel weird or sluggish without new roller weights, (usually lower gram weight) So, in the Zuma its probably somewhere around 6 or 6.5 roller weights for a tuned pipe. Also if you don't reject the carb, you could run the bike lean and burn the piston. Also, also, the Yashuni pipe actually has another restriction inside the silencer. You need to cut or grind the weld on that to drop that one out as well.

[@moncler8496]

How did you change the gasket on the bottom, it’s impossible!! It keeps falling

[@therealboofighter]

I am not sure. It just works for me.

[@ellipticxl5822]

Hey I have the same scooter and exhaust but I never knew about jetting what jet size did u use before and after exhaust

[@therealboofighter]

Before was stock. I think it said 80 on it. I have played around quite a bit testing different sizes and now I don’t remember what I have in it. It is a bit bigger then stock. Not much though.

[@mattalger2325]

​@@therealboofighter An expansion "pipe" on a Zume is going to need between 85 and 95 main jet I believe.

[@Ethan_Amendt.509]

Do you have a link to which you bought it from? I wanna buy one for mine lol

[@therealboofighter]

Scootertuning.ca

[@richarddukard8989]

Is the new sound really overbearing? I don't want to be that guy with the obnoxious sounding bike. I just want a bit more speed 🚴

[@therealboofighter]

I found it great. I also find sound to be subjective, I liked the sound and did not find it overbearing. I am also wearing a full face helmet so that muffles the sound a lot.

[@user-zt2cc7qq9b]

Do they recommend a larger jet for the carb with that chamber?

[@therealboofighter]

I do t think so.

[@user-zt2cc7qq9b]

@@therealboofighter Okay. I'm buying a 1993 Yamaha Jog and I want to put a pipe on it. How much was your exhaust and kit?

[@user-zt2cc7qq9b]

@@therealboofighter Also, I wonder how much of a difference it would make if I don't remove the restrictor insert thingy.

[@therealboofighter]

@@user-zt2cc7qq9b I think mine was around 350? Canadian. Check out Scootertunning.ca they have great stuff and selection. I would take the restriction out. It’s not to hard to do and makes it flow better.

[@JetSkiBuyFixPlaySellChannel]

If you change the exhaust you do need to rejet.

[@so2315]

Is this the Yasuni R or Z model? I ask because I put a Yasuni R on my stock 2005 Zuma 50 and the thing won't go over 10mph now, just bogs down like it is fouling the plugs. I have the stock rollers in mine, going to try 5 gram rollers and see if that helps.

[@therealboofighter]

I don’t know

[@czesare8902]

the vid shows the z

[@thecreator4008]

The z is more adapted for a stock 50, the R is more for the 70cc

[@czesare8902]

@@thecreator4008 i do agree to a certain extend, however in my experience if u have a regular or a high RPM 50cc the R will run better than the Z. the R is very good because u can use it on 50cc with good performance and and mild 70cc. i run the R on my stock 50cc aerox and that thing goes about 85+km/h atm with no extra tunning done to the scooter

[@thecreator4008]

@@czesare8902 Well the aerox is a really powerfull stock scooter😂

[@Ethan_Amendt.509]

Putting this exhaust on do you have to jet it?

[@therealboofighter]

You can.

[@Ethan_Amendt.509]

@@therealboofighter but is it mandatory for it?

[@therealboofighter]

I am not sure. Mine ran fine with out. It ran fine with a bit bigger jet. But I am not an expert in carb tuning at all. I could be way off in my thinking it was fine.

[@Ethan_Amendt.509]

@@therealboofighter k thanks

[@steencorneille8708]

Hey what size jet did u use?

[@willemloosman2127]

and u need lighter rollers in ur vario

[@joerivamonte3004]

Have ended up jetting the scooter since then?

[@therealboofighter]

I have been playing around with it.

[@miguelchevair4553]

The Yasuni Z is better for performance and acceleration for 50cc than a Yasuni R. The Yasuni R is better for performance and acceleration for 70cc scooter. Hope i help you :)

[@therealboofighter]

Every little thing helps. Thanks for sharing.

[@miguelchevair4553]

@@therealboofighter No problem love your vids :)

[@therealboofighter]

Thanks for that, I needed that encouragement. I have been working crazy out of town and have not had a chance to shot more. But I hope this winter to have a lot more on the scooter and MR2.

[@njghbcxdmvfghcfhb7916]

No...

[@dnh3005]

True

[@likkitongue]

Watching this a year later and hope you figured out that you installed the rubber bushings incorrectly lol. Appreciate you posting tho.

[@therealboofighter]

Nope and they are still going strong.

[@likkitongue]

@@therealboofighter Each of those big round rings on the exhaust gets two bushings with a metal sleeve. Bushings are tapered, so one fits on the inside and another one on the outside, tapers facing toward each other. Steel sleeve through both with the bolt through the middle. Hard to explain writing it out. Basically bolt, washer, bushing, bushing, nut is how it goes through on each ring of the exhaust. Just thought I would let you know if you ever need to do it again.

[@therealboofighter]

Thank you.

[@arnaud2896]

Any gain of speed?

[@therealboofighter]

About 5-10 kph

[@arnaud2896]

boofighter is it stock?

[@therealboofighter]

Other then the pipe, and the rollers and weights

[@arnaud2896]

boofighter perfect thanks

[@therealboofighter]

Np

[@mateotheduck7095]

Is it really loud in person?

[@therealboofighter]

No.

[@turbocharger5482]

did you change the main jet in the carb? that might be why you are loosing low end power

[@therealboofighter]

I have played with the main jet and it turns out that I don’t know what I am doing. Lol.

[@turbocharger5482]

@@therealboofighter do you know the size of the original main jet? if so then start with 10-20 sizes bigger then work your way up of down from there so that you have the right amount of fuel/air ratio

[@therealboofighter]

kzbin.info/www/bejne/kJOkiZedoMtqrNE

[@sungazergaming9996]

the reason there’s scratches cause there handmade in Spain

[@moncler8496]

My scooter won’t pass 40km/h now with it on, any idea as to why and or a fix?

[@c6liyt]

what scooter do u have ?

[@bixo873]

Now you need 70cc

[@therealboofighter]

Been thinking about it.

[@Style.23]

Cenkiw👏👏👏

[@SchleighSimeon]

Mr2

[@therealboofighter]

Hey.

[@borg386]

Sounds terrible!

[@therealboofighter]

Thank you for watching.