ESE's works engine tuner

[Gradella23]

Rob, what would be a suitable rod and piston combination for a 63cc disc valve engine?

When i was thinking about designing a cylinder and crank kit for the italjet formula 125 twin, i was eying the kawasaki kx60 vertex piston, 43mm bore with one ring.
and a 85 or 90 mm conrod

[husaberg]

Frits Overmars makes a cameo appearance in this video

Lexus lfa exhaust. for those with short attention spans about 16.50

https://www.youtube.com/watch?v=crEeOEs4ZP0

[F5 Dave]

We fired up the TST100 with its 3D printed crankcases the other night. Pretty happy with how it went considering.

First learning with the injection, my primary injector was way too large and I lost control of fueling low down, it'd either lean bog or flood. Easy fix though. At the moment it's running a typical alpha-n map, but once the new injectors turn up, we'll swap over to the custom software.

https://www.youtube.com/watch?v=0LkzgFYekEk

Sounds fantastic Glen. Look forward to seeing it on track.

[Frits Overmars]

Frits Overmars makes a cameo appearance in this video. Lexus lfa exhaust. For those with short attention spans about 16.50

World fame after all
https://www.youtube.com/watch?v=crEeOEs4ZP0#t=16m47s

[Flettner]

When i was thinking about designing a cylinder and crank kit for the italjet formula 125 twin, i was eying the kawasaki kx60 vertex piston, 43mm bore with one ring.
and a 85 or 90 mm conrod

I actually have a KX65 cylinder here somewhere, I must dig it out.

[husaberg]

I actually have a KX65 cylinder here somewhere, I must dig it out.

Pretty sure i have one here too. Sing out if you want it..

[Flettner]

Pretty sure i have one here too. Sing out if you want it..

Thankyou.
I'll likely cast my own but I might take a look at the transfer arrangement.

[husaberg]

Thankyou.
I'll likely cast my own but I might take a look at the transfer arrangement.

they aren't that good tbh, flat roofed things.
if you were going to copy anything i would copy the ktm65 2009 on.
The ktm 50 was designed as a 65 and shrunk down.

this is what they look like


this one is only $149nzd a few hunded kms away
i wonder why lol.

https://pronorthparts.co.nz/65-sx-20...230138000-278/

this is their piston

For the rod in 12mm gudgeon you can go up to 98mm with a ts90/100. They have those weird Suzuki 19mm crankpins,
but Honda on the mbx80 nrs50 are 91mm to suit the 12mm se pin. 18mm big end pin
Yamaha pw80 is 12mm pin and 20mm bigend 94mm
Derbi senda is a 90mm on in 16mm be pin

[Flettner]

Where could we use this little beauty
https://youtube.com/shorts/id6LxB2RN...XDlYC34mK6zF5V

[husaberg]

Where could we use this little beauty
https://youtube.com/shorts/id6LxB2RN...XDlYC34mK6zF5V

https://www.youtube.com/watch?v=WZgAPV5M5Es

[ApolloMotoMoto]

Where could we use this little beauty
https://youtube.com/shorts/id6LxB2RN...XDlYC34mK6zF5V

Dynamic tailpipe restrictor nozzle.

Larger diameter at low rpm, closing down as RPM's rise to extend the effective resonant range of the pipe, similar in concept to a powervalve on the exhaust port.

[Peter1962]

Dynamic tailpipe restrictor nozzle.

Larger diameter at low rpm, closing down as RPM's rise to extend the effective resonant range of the pipe, similar in concept to a powervalve on the exhaust port.

Frits Overmars allready designed that, with a solution that is mechanicaly more easy to operate. (linear motion for the restrictor in the tailpipe)

[Peter1962]

Where could we use this little beauty
https://youtube.com/shorts/id6LxB2RN...XDlYC34mK6zF5V

This idea could well evolve into a Mark II version of your 'double sliding gibs' on the rotary valve !

[ApolloMotoMoto]

Frits Overmars allready designed that, with a solution that is mechanicaly more easy to operate. (linear motion for the restrictor in the tailpipe)

Correct

[Flettner]

Frits Overmars allready designed that, with a solution that is mechanicaly more easy to operate. (linear motion for the restrictor in the tailpipe)

Not at all what I had in mind.