ESE's works engine tuner

[WilDun]

While the first one was just so obviously a 125 single with disc valve induction, 42 mm carb, 6 speed, water cooled, 54 kg rider and with just a hint of HCCI, the one below is one is a bit different. Just another friggin 4 stroke , but neat nonetheless:

https://www.facebook.com/7Tune/videos/640131842690922/

No more Willy.

Honda 125/5 maybe?, - Frits's one? well.... a Deutz at full revs? Prize for the biggest laugh however, goes to the Trombone Vespa!!!

Sorry TZ, we're corrupting your thread.

[Pursang]

I think we need to hear a 2 Stroke Tractor?

https://www.youtube.com/watch?v=02i02czjcfs

And who actually invented the Expansion Chamber Exhaust?



Cheers, Daryl

[Tim Ey]

For the rpm of a Bulldog, the mounted pipe is only 4-7 meters too short...

[Haufen]

Two-stroke song

[breezy]

Breezy, the term "running on the pipe" is just another expression for 'running in the powerband'.


Frits, thank you very much. i had hoped it meant as soon as the engine fired up..never mind...

[Jannem]

Another 2-stroke tractor.😊
https://youtu.be/RoiWpJLokEc

[WilDun]

I think we need to hear a 2 Stroke Tractor?

https://www.youtube.com/watch?v=02i02czjcfs

And who actually invented the Expansion Chamber Exhaust?

Cheers, Daryl

I meant the Lanz Bulldog but confused it with the Deutz.

This stuff is very interesting indeed, but the "oddball" thread was more or less intended to catch the overflow from this thread so ESE could concentrate on actual engine modification projects etc. but whether or not TZ thinks that, I dunno - he may think differently!

[Grumph]

And who actually invented the Expansion Chamber Exhaust?

Cheers, Daryl

Every Lanz I've seen here in NZ - and there are a few brought out for parades etc - has a plain pipe with a straight through silencer.
If the mag is in good nick, the party trick is to run very slowly at idle - and blow smoke rings.

There was a write up in Classic Bike or Classic Racer, late 80's, of a guy who rode worked Villiers 125's in the IOM - 1950's. To silence one of them for a last minute running in session on the island, he tacked on an old fire extinguisher body - double taper....
Apparently it went so well he actually thought he was in with a chance of a place...Then he took it off for the race.
Hindsight is a wonderful thing.

[peewee]

hey guys I got the swingarm finished and installed. rear brakes are mounted and chain alignment was on the money. just have to put on the body panels and I can test ride it next weekend. like haufen suggested I made 11mm holes on each end for a rosett plug weld. also im going to remove the complete front brake assembly and get rid of some unecesary weight

[husaberg]

I think we need to hear a 2 Stroke Tractor?
https://upload.wikimedia.org/wikiped...15.07.2006.jpg

Cheers, Daryl

Every Lanz I've seen here in NZ - and there are a few brought out for parades etc - has a plain pipe with a straight through silencer.
If the mag is in good nick, the party trick is to run very slowly at idle - and blow smoke rings.

One of the more intersting things with the bulldogs is how they can be started with special 12g shotgun cartridge.
They crank start using the steering wheel on the flywheel as well.
They are pretty common over here, two within 20kms, probably more.

[SwePatrick]

Not uncommon on Methanol burners to have a silencer fire. Initially anyway, it's the coolest part of the pipe and anything coming through unburned is going to collect/condense there. Then when it's hot enough, it'll catch fire. I'd guess you're running very rich - leaning down is a delicate process on Methanol.
FWIW, I stopped using packed mufflers on the 4T speedway engines and went to all metal bypass type mufflers to avoid the fires...

I can´t say i am running it rich, but i still need more experiance to state that.
I got 'perfect' colours on spark plug after a ~74hp pull.
But! now when you are saying it, i DO have problems with carb, maybe it floods and get rich condition all of a sudden in the middle of one of the last pulls.
I need to study on that, engine is apart for checkup and i am impressed.
Almost no wear at all.
Piston skirts weared like one heat in motocross and the wristpin has a little bit of wear(ordered a new one with KBK bearing)

I find this amazing cause it actually is a KX250 engine that i only has downstroked.
No lighter piston etc etc etc.
And i have revved it ~14000 several times.
~40 runs on 1/8 mile, over 100 dynopulls, and a couple of hours of cruising and testing.

Methanol must be a twostrokers best friend =)

[adegnes]

Ngk B-E10.5



Any experience with this one?
Step up from the BRxEG?
It has a slanted straight ground strap, and a fine center electrode(not made of fancy metal tho)

Yeah Wobbly, I know. R7376 or go home...

[dark art]

Ngk B-E10.5

I believe those are non-resistor plugs. About the performance, it seems a pretty standard spark plug, except the 10.5 range.

[adegnes]

I believe those are non-resistor plugs. About the performance, it seems a pretty standard spark plug, except the 10.5 range.

Maybe that's what's "racing" about them, no resistor and half a step colder

I'll have to dig a bit more.

[dark art]

Maybe that's what's "racing" about them, no resistor and half a step colder

No resistor means no use with digital electronics, so not a big help with modern programable CDIs. Maybe for vintage and classic racing the 10.5 temp range is good choice for cheap plugs or for the ones who use analog igniton systems (and eventually want to mess up the adversaries who use digital ).