Very cool! Even though I'm not sure what units your dyno numbers are it looks like some decent improvment - roughly 13% on the peak torque number and it is an 'all over' gain - not a trade off. Are you going to offer these for sale as a kit or something?

 

Thank you for your response!
We are in the final stages of adjustment / fine-tuning and then we are going to put it on the market.
The prize of the total set is not yet known.

At this moment we are thinking about an exchange system.
In other words: sent in your own filter assembly and we'll send you a complete ready-to-use setback in return.

 

Hi there, here are the stacks working on a customer MT09 Tracer 2017, we are glad to tell you they are working very well
We need to adjust the air/fuel a little bit , but that's no problem because we are working with Woolich Racing Software.
What you see here, is that we are trying to find the correct moment (rpm related) to lift the variable stacks, we are very close to it.
Thank you for any comment.

Wilco Visser
VPMotorsport
Netherland

This is the link to the short film working on the MT09:
IMG_4333.MOV

Hi, do you have a picture of these the variable stacks to share?

 

There is a link in the first post to a short video - if you google search their name you'll find some more - looks like they've already been selling a version for aprillia sport bikes for a while.

 

are you saying the only difference between the 2 runs on the dyno sheet is your velocity stacks?

if so I find that hard to believe

 

Hi, if you look a bit closer and probably you can read this as a tuner, we have made 26 runs: first without stacks and the other with stacks. Meanwhile we autotuned it with Woolich racing software. This bike has an akrapovic full system with db killer mounted. No more, no less.

On the other hand we are very very certain about the results. We see it on different bikes.

The compromise made by the manufacturer is a three times unequal lenght of stacks. We made 'the thing' how it should perform

 

Is "Vermogen" the same as horsepower?
Thanks!

 

Yes, that is indeed the same thing. Its the ho measured at the wheel.

 

Very interesting. How can I get in touch with you, I'm in Italy.

 

I'm interested on this. I have a 2016 MT09 Euro and I leave in Italy. How can I contact you for more details, please?

 

I think the only proper thing to do here is to have an independent 3rd party verify the results. I humbly volunteer my bike and my time at great cost to myself and significant loss of summer riding season to take the hit for the forum team.
@VPMotorsport - please feel free to contact me via PM and we can arrange the shipping details for my free variable length stacks
@vcyclenut - once I have the stacks installed I'll contact you and we can arrange some dyno time (again free of charge)

 

Hey Psycoreefer.

Unfortunately, we are not giving out free variable stacks. Variable stacks have been around for some time on high-end bikes and have been proven to work (ask the manufacturers). We are producing the stacks for different segments that dont have them fitted as standard.

We will let a known certified third party test them.

Thank you for your understanding.

 

We produced a improved version of the upper stacks, here have a look!

We made them stronger and more durable! Try to psot the differences.

 

Hey FZ09 forum,

We're thrilled to announce that our Variable Intake Stacks are now live on the webshop! Variable stacks on our webshop!

After extensive fine-tuning and rigorous testing on our dynojet, these stacks are ready to take your Yamaha MT-09 and MT-09 Tracer (with the CP3 engine) to the next level. Whether you're carving up the twisties or dominating the straightaways, our Variable Intake Stacks offer the performance and responsiveness your bike needs.
To show our appreciation for your patience during the development process, the first 5 buyers will receive a €100 discount!

 

Yes we tested the three short stacks it fixes the drop off at top end pulls flat to Rev limit

 

i will put them on my carbon baby maybe next month, I got 117 hp on the wheel now, so keep you guys informed.

 

so maybe we take the doubts and questions away😁

 

Hey Fred,

Thanks for posting!

We will upload the results of Fred's bike here as soon as he has been on our dyno.

PS. We are also currently working on a variable intake set for the XSR900 GP (which has the same CP3 engine), more info about that coming soon!

 

Awesome - please post your before & after dyno runs with the stacks being the only change - would love to see how they perform tested by a third party.

 

im in for dyno results !!!

 

Any updates ???? Up

 

No at the end of next week I will be in Holland

 

Ok, I’ve been in Holland this weekend and get the stacks on my bike that took a few hours to modified the airbox , put the stacks on it and install the rest of the hardware ( but no rocket science)
We tested the bike how it was ( without the stacks) and after (with them), and oh my god what a difference, not only on the dyno ( watch the result) but also on the road with the test drive.
The engine revs right from the start( bottom) until l the very end.
Accelerate in the corner is amazing, climbing in the chain in third gear( 100kilo plus gear) difficult to hold the front wheel on the tarmac.
Feels like a total new bike for me, in the lower range the engine feels nice and smooth, no dip or so, reacting on the gas is fantastic.
Just short,,,,,very nice mod.
Cp3 engine , akrapovic titanium exhaust with carbon tip k&n filter and the stacks.
It will require a flash update on the dyno to get the most out of it.

 

preparing the airfilterbox

 

Putting on the stacks

 

Are the 3 bottom stacks shorter than the stock short stack ?

 

Results of the dyno runs.

 

Are the 3 bottom stacks shorter than the stock short stack ?

Yes a little.

 

Very nice... I guess that you're getting your black beauty ready for 2025 Sardinia's tour

 

And you definitely wil drive on it

 

What about the wiring of the new stacks? How are they now connected to the stock cables and how it has been modified (still possible to return to stock cables?)?

 

They aren’t connected to the cables, it’s electrical power by a small device mounted inside under the seat.