ESE's works engine tuner

[peewee]

upp stuff is garbage from my experience. genuine mikuni ruuber inlets are top notch. beware of imposter brands

[speedpro]

Mikuni stuff isn't all that expensive either, example and possibly useful: https://www.mikunioz.com/shop/mikuni...v=8e3eb2c69a18

[F5 Dave]

It's just licking 100hp, I suppose I could throw 30 away

[diesel pig]

Mikuni stuff isn't all that expensive either, example and possibly useful: https://www.mikunioz.com/shop/mikuni...v=8e3eb2c69a18

And they are really good to deal with as well.

[guyhockley]

Great minds think alike, Guy . This is how we tried to kill that nasty return pulse. The result (lack of) made me conclude that it wasn't just the pulse that messed things up; it had to be the Helmholtz resonance as well, so more drastic measures were called for. We'll turn those pipes into foulstroke megaphones; that'll teach 'm!
Attachment 340859

Someone always has to go one better...

[Muhr]

Is there anyone who has tips on where to buy new power valve servos with potentiometes

[wobbly]

As a huge number of owners fit aftermarket pipes on the R1 Yamaha , there are plenty of the exup servo motors on Ebay.
All of these are of recent manufacture so they are in good condition compared to the old YPVS units.
The only difference is that the plug is part of the body.
R6 and many other models dont work with the Ignitech.

[Muhr]

Thanks Wob! the only new ones i found are:
https://m.ebay.ie/itm/CAGIVA-MITO-12...wAAOSw32lYuR1q

[flyincat]

To the pipe guys....what is the impact of a highly curved pipe in regards to measured length vs reality? In the case of a straight pipe, measured and reality being the same thing. Clearly the inside of the curve is a completely different length than the outside, especially when the fatter section is curved. This must cause the pressure wave to do some funny stuff, no?

What is the proper length measurement method for a highly curved pipe? If the proper way is still the center line, is there a better way than eyeballing the center line?

[Haufen]

To the pipe guys....what is the impact of a highly curved pipe in regards to measured length vs reality? In the case of a straight pipe, measured and reality being the same thing. Clearly the inside of the curve is a completely different length than the outside, especially when the fatter section is curved. This must cause the pressure wave to do some funny stuff, no?

What is the proper length measurement method for a highly curved pipe? If the proper way is still the center line, is there a better way than eyeballing the center line?

Measuring the outside and the inside lengths and dividing the value by two should be more accurate than eyeballing the center line.

I have seen very curved pipes act as if they were a tad shorter compared to the straight versions.

[jamathi]

'sad' news from Holland
RYGER seems to have big financial problems and will probably close down.
Bankruptcy very likely.....
Not very strange after failing to sell even 1 engine in 2 years.....
There is only 50% of the announced 70HP and 30.000 rpm.
And maybe even less!
Earlier claims were a bit exaggerated!
Some people even believed it, I never did....
Knowing from experience the effort it takes to make just 54 HP with a 125cc engine.

I just read on a Dutch forum that RYGER BV has been disbanded....
But Ryger is not bankrupt-yet....

[peewee]

what do you think of this head from 2019 ktm250sx carburetor model ? they used this style in 2014 but i thought they went back to common bathtub design

[Frits Overmars]

'sad' news from Holland. RYGER seems to have big financial problems and will probably close down.
Bankruptcy very likely..... Not very strange after failing to sell even 1 engine in 2 years.....
There is only 50% of the announced 70HP and 30.000 rpm. And maybe even less! Earlier claims were a bit exaggerated!
Some people even believed it, I never did.... Knowing from experience the effort it takes to make just 54 HP with a 125cc engine.
I just read on a Dutch forum that RYGER BV has been disbanded. But Ryger is not bankrupt-yet....

This announcement from the Dutch Chamber of Commerce would suggest that they are, Jan:

2019-02-12: Wijziging: Per 15-11-2017 liquidatie beëindigd. Per 11-2-2019 is de rechtspersoon uitgeschreven wegens Geen bekende baten meer aanwezig bij rechtspersoon.

I suppose it would also mean that you are no longer bound by your Non-Disclosure Agreement .

[Frits Overmars]

what do you think of this head from 2019 ktm250sx carburetor model ? they used this style in 2014 but i thought they went back to common bathtub design

It would be a bit difficult for KTM to go back to a common bathtub design, as they never did use a bathtub design in the first place.
Below left are a couple of KTM head designs, below right is a bathtub head, looking rather like a bathtub, wouldn't you say?

[peewee]

i must have my terms wrong frits. i meen the style with flat roof. what is the reason for no defined squish band ? maybe it has more managable power or something