Help choosing exhaust.

[hoecake]

Hello! I have a Yamaha Jog RR from 04. It's stock with the vario restrictor removed. It's already a ripper, but i am kinda stuck on what exhaust to choose now. Top contenders are in order - 1. Leovince TT. Can pick up for 120€ brand new. 2. Stage6 Pro Replica Mk2. On sale for 150€ on maxiscoot. 3. Polini orginal, Wild Lion, Giannelli go. These are all the same exhaust, but i was wondering how the powerband is on them? Where is peak power? How is the power compared to the TT? 4. Yasuni R. Just went off sale on maxiscoot. Now over 200€.

I just wanna go quick and wheelie easily. Budget would be ~150€, hence why the Yasuni R is at 4.

Thanks for all the help guys!

[aeroxbud]

The wild lion would give you more low down grunt. It's also quiet. The Yasuni R or pro replica highest top speed.
The TT is a good pipe for the money. Will have more power and top speed than the wild lion. But won't compare to the Yasuni.
You can get an idea of the power band here. static.pedparts.co.uk/c/asset/sports-pipe-blog/50cc.png
I ran a Yasuni Z on my jog. Had great acceleration, and not bad speed. Power is very similar to the TT. But has a lot wider power band at the top than the TT.

[aeroxbud]

The expansion chamber exhausts will need lighter rollers and clutch springs.
A good variator would make a big difference to the way the bike holds the revs as you accelerate. The Yamaha one isn't very good to be honest.

[hoecake]

Sept 7, 2024 6:44:01 GMT -5 aeroxbud said:

The wild lion would give you more low down grunt. It's also quiet. The Yasuni R or pro replica highest top speed.
The TT is a good pipe for the money. Will have more power and top speed than the wild lion. But won't compare to the Yasuni.
You can get an idea of the power band here. static.pedparts.co.uk/c/asset/sports-pipe-blog/50cc.png
I ran a Yasuni Z on my jog. Had great acceleration, and not bad speed. Power is very similar to the TT. But has a lot wider power band at the top than the TT.

Thank you mate! Yeah i've been looking at the Z, might buy it if it goes on sale. And the variator rollers and springs are pretty obvious. It seems like the powerband on the Z is very long, so it produces good power all around instead of just at the peak?

[aeroxbud]

Yes top speed isn't as good as the R. But its got a nice wide power band to make it easy to set up. The Z is making about 0.5hp more all the way to its peak power than the Yasuni R. It doesn't sound a lot. But it's quite noticeable on small bikes.
I really like Yasuni pipes. They always seem to have a wider power band than the other pipes. The only down side is they rust pretty badly.