Small Engine Motor Madness 🤪

[Hellion]

The guy actually sat on it as-is, with stock motor and rode it around his shop. He's about 6 feet tall, plus a few inches maybe. If the two-smoke adds some decent power, it could be fun no matter how uncomfortable.

 

[Grizzlymi]

For sure. That turning radius sucks, so needs mo power!

 

[Hellion]

Part Deux. Always good DIY content:

Edited to add: looks like he is retaining the chainsaw more or less intact so it could return to duty cutting wood.

 

[Grizzlymi]

Mustie has some awesome content! Love his thinking out of the box approach. Very cool.

 

[Thepartsguy]

 

[Denny]

The valves are too shrouded, too small and 2 too many. It has been proven that any more than 4 valves per cylinder hurts flow.

 

[Thepartsguy]

The valves are too shrouded, too small and 2 too many. It has been proven that any more than 4 valves per cylinder hurts flow.

Take a tecumseh 3hp engine block and a Tecumseh 5hp engine block to another part of the earth and ask them to cut it out of billet would probably cost less then one American $100 bill… Whatever that would equal out to in there currency.

Bring that billet tec block back to the states and ask around prices to get it copied. You looking at a 10 run minimum with a hefty price tag each block. Someone looking to make $8k+ easy to copy the cheap 3rd world block.

So cheap down there they can just experiment and it doesn’t matter. I’m 1000% jealous..

 

[65ShelbyClone]

Looks like something the GY6 racers in east Asia would do.

It's also possible to have so much flow potential that you can't spin the engine high enough to get useful velocity through the ports. I see what I would consider a number of compromises that don't seem curious given the amount of work going into the head. Valve stems are pretty big diameter as is the spark plug.

 

[Hellion]

RARE John DeLorean built a high-speed go-kart Rescue​

 

[Hellion]

Okay, so how did he triple the two-stroke power? It’s one of those annoying wordless video montages.

Prototyping 2-strokes - handcrafted

Hi, this is a short summary of how some new special parts were made to boost the performance of an old 250 cc JAWA single. One could call it JAWA 360 now, or...

www.youtube.com

 

[Hellion]

These are so cool.

 

[Grizzlymi]

I had an old tether drag car when I was a kid. Even though it just went in a circle, it hauled a$$ and man would I get dizzy!

 

[Denny]

These are so cool.

That is so cool! When I was a kid I could run mine for hours without getting bored. The school by my house even had a gas powered car club.

 

[Wicked_Daddy]

Let me help ya out....

Egad I loathe video shorts and the vertical video format they do it in. We are in the widescreen era (and we even see in widescreen) but these neanderthals are taking us backward....

Only 8 HP out of that thing? Pretty... but c'mon - where's the power?

 

[65ShelbyClone]

Okay, so how did he triple the two-stroke power? It’s one of those annoying wordless video montages.

Prototyping 2-strokes - handcrafted

Hi, this is a short summary of how some new special parts were made to boost the performance of an old 250 cc JAWA single. One could call it JAWA 360 now, or...

www.youtube.com

It's all in the video: a multi-million of dollar casting foundry and machining facility were used to make a custom big bore cylinder and stroker crank. The "tripling" part is plausible to me since the engine only made 16-17hp originally and didn't really have expansion chambers. But still, when you make a power claim like that and have the resources that guy does, it's lame IMO not to have before and after dyno data to back it up.