ESE's works engine tuner

[JanBros]

maybe Jan will add some translation ans text ad some more pis thisis alli have

I'm a Jan
there is nothing technicaly interesting in the text, it is what we would call nowadays "clickbait" news : an article based on a photo that tell's you no more than what you can see in the picture.
I presume those days they already had some crowdfunding that raised 16.000 gulden (1 gulden is slightly less than half an euro) and there is some little talk about the successes of 1968-69-70 and the preparation for the next season.
what strikes me the most in the article is that at that time, aparently they didn't have an hydraulic press, for example to rebuilt cranks.

[Frits Overmars]

an article based on a photo that tells you no more than what you can see in the picture.

Except: the picture is lying! Jan Thiel never intended to place the exhaust pipe above the engine but he did not want to give anything away at that stage, so for this photo he rotated the cylinder 180°, with the exhaust port on top.

[pete376403]

More from FB. The text accompanying it is obviously AI generated as this engine is described as a 350 twin (so I left that off)

[Peljhan]

I do some manual machining for my projects and I am wondering how were the outer radiuses on engine mounts made on this Jamathi engine?
I have some ideas, but want to know how it was made back in a day?

[wobbly]

Just as easy now as it was back then. The case supported thru the mounting hole in a 3 Jaw on a dividing head set vertically - with a long series cutter machining the whole surface in
several passes.

[husaberg]

Jamathi

https://www.kiwibiker.co.nz/forums/showthread.php/145224-Race-chassis?p=1131025140#post1131025140

https://www.elsberg-tuning.dk/jamathi.html

[Flettner]

I do some manual machining for my projects and I am wondering how were the outer radiuses on engine mounts made on this Jamathi engine?
I have some ideas, but want to know how it was made back in a day?

Cast them.

[husaberg]

I do some manual machining for my projects and I am wondering how were the outer radiuses on engine mounts made on this Jamathi engine?
I have some ideas, but want to know how it was made back in a day?

Cast them.

Go all Bert Munro and use a file.
note these conrods

later ones were caterpillar axels heated up power hammered into a fillet holes machined and roughed out but then finished with handtools
i think he could knock out one in a weekend.
Early ones were i think from ford truck axles.

[ApolloMotoMoto]

Unintended Post

[ApolloMotoMoto]

I am attempting to track down an ignition coil that may not exist, or may be quite rare.... (or it might be very common but no one really knows what it is...).

I need CDI ignition coils for a project I am working on with ....really low.... inductance values.

I know Wayne uses high(ish) inductane Crane Cams PS91 coils for the 2-into-1 IgniTech DC-CDI setup to pump up the amps driven into the spark kernel.

But, I am playing with a different... expression... of the CDI circuit; and I am tuning for a faster rise time for the first high kV spike that "strikes the arc" (in addition to dumping some decent amps into the damped oscillation "tail"...)

The expression of the circuit I am playing with drives a requirement for ...medium... turns ratio in like the 30-60:1 range and LOW inductance....

Like uH scale primary and mH scale secondary. Anything over 1 Henry on the secondary is useless for my efforts...

IgniTech is one of the only people on the planet that publish inductance numbers with their coils; unfortunately no secondary inductance reported for the IC-CDI-F; but with its 80 uH primary inductance it is in a class of coils that are so rare they might as well not even exist.


Anyone of you know where I can find coil that are in the same "family" as the IgniTech IC-CDI-F, and by that I mean EXTREMELY low inductance?

I am really tring to see if I can find anything confirmed lower inductance than the IC-CDI-F ....anywhere on the planet..... before I go have custom coils wound.

[katinas]

Anyone of you know where I can find coil that are in the same "family" as the IgniTech IC-CDI-F, and by that I mean EXTREMELY low inductance?

I am really tring to see if I can find anything confirmed lower inductance than the IC-CDI-F ....anywhere on the planet..... before I go have custom coils wound.

Honda NS400\250 small type CDI coil MP 02, with primary 0,18 ohm, but secondary 4,1 k ohms.
https://www.ebay.co.uk/itm/183162158...+400+coil&epid
https://www.ebay.co.uk/itm/177335855...parms=amclksrc

[TZ350]

.

2Stroke Stuffing. Claims 26 HP on pump gas:- https://youtu.be/bRRIXnkRGwQ?si=mlPz2tbHtQNamVgD