ESE's works engine tuner

[Frits Overmars]

...the green bike blows past the other bikes like they're standing still! Did the RSA125 act like that?

It would have, against a competition of reed-valve Hondas and KTMs. But except for the RSA's first outing, where it only displayed its full potential in a breathtaking final lap, there were always other RSAs around, and RSWs, that were not much slower.

[Muhr]

Maybe someone thinks it’s interesting

http://portal.research.lu.se/portal/...297/625826.pdf

[RomeuPT]

That intake rubber is huge - the old NX4 one is only around 25mm overall,so that pulls the whole carb and bowl way closer.
16210-NX4-000 - hard to find though.
A downdraft oval bore Keihin carb off a NS400 would be the go,its been done before.
As would a 36mm downdraft off an Aprilia RS250 road bike.
But the Lectron would work to.

Say I could grind 1cm and raise the flange lenght to fit a PWM, still good advantage over a worked pwk?

Guess I will buy the PWM and still test the worked PWK

[wobbly]

If you can find an NX4 manifold it would be as long as what you have shown, less the extra rubber and extra hoseclip on the carb.
I have seen several PJS carb for sale, that is the short race carb off the later Honda RS125.
It has TPS and the solenoid PJ - that makes the same power as a PWM, but depending on your end use, the PJ makes a huge difference to overev..

[RomeuPT]

If you can find an NX4 manifold it would be as long as what you have shown, less the extra rubber and extra hoseclip on the carb.
I have seen several PJS carb for sale, that is the short race carb off the later Honda RS125.
It has TPS and the solenoid PJ - that makes the same power as a PWM, but depending on your end use, the PJ makes a huge difference to overev..

I am pretty happy with the overrev I got already just with ignitech etc, dont need to blow parts even more.

Going to try both pwk and pwm

Hope to ear about any test of piston edge radius.

cheers

[wobbly]

Has someone got a pic of the Aprilia cylinder, looking directly at the Exhaust duct with a spigot fitted.
I want to see what the steps actually look like at the bolt on face.

[husaberg]

Has someone got a pic of the Aprilia cylinder, looking directly at the Exhaust duct with a spigot fitted.
I want to see what the steps actually look like at the bolt on face.

[jamathi]

Has someone got a pic of the Aprilia cylinder, looking directly at the Exhaust duct with a spigot fitted.
I want to see what the steps actually look like at the bolt on face.

Is this what you want Wobbly?

[TZ350]

Maybe someone thinks it’s interesting

http://portal.research.lu.se/portal/...297/625826.pdf

Yep, interesting. thanks.

[wobbly]

Thanks Husa and Jan.
I have a new cylinder to test from TM (designed with the side ears right thru the spigot ) and i want to run it with exactly the Aprilia style steps first
then several versions with top/bottom steps removed with added material in the spigot.

[jamathi]

Thanks Husa and Jan.
I have a new cylinder to test from TM (designed with the side ears right thru the spigot ) and i want to run it with exactly the Aprilia style steps first
then several versions with top/bottom steps removed with added material in the spigot.

The flange was 40-41 conical. Length 40mm

[wobbly]

The best TM spigot at the moment matches the oval duct exit, then matches the round header entry.
But with the added area of the ears down the side,I have reduced the oval height - to keep the exit area the same as previously.
Thus of course being a 2T you cant assume anything about what will make the best power with such a big change , so i will test all the different configurations again.

[SwePatrick]

That discussion about methanol and corrosion.

This floatbowl is from my VM44 carb, it has been lying in my garage since september untouched unopened.
A couple of days ago i was curious if it was mayhem inside the bowl.

This is what i saw: (dark spots were there when i bought the carb)

[SwePatrick]

News from Bidalot, a new hot 50cc cylinderkit



They say it will be a 70cc model also in the future.

Originalpost on facebook:
https://www.facebook.com/bidalot.tec...89852161083705

[RomeuPT]

Say I could grind 1cm and raise the flange lenght to fit a PWM, still good advantage over a worked pwk?

Guess I will buy the PWM and still test the worked PWK

Worked the pwk, bellmouth shortned 11mm, front shortened 2.5mm, air vents grinded, choke holes filled. and gone for some straight's. no plug checks yet.

Mid to high range seems to had a little lost, overrev seems to be a litle improved.