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News:
Like the Phoenix rising from the ashes Two Stroke Motocross is reborn!
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General Two Stroke Talk / Re: Rotary Valve EFI 360.
« on: July 10, 2021, 01:32:18 AM »
running it around the yard now, crisp throttle response.
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General Two Stroke Talk / Re: Rotary Valve EFI 360.
« on: March 15, 2021, 03:56:42 PM »
Life gets in the way, sorry the video upside down, but here running at last. Only on the water brake dyno at the moment. You can see the sliding Gibs throttle at work. They overlay the rotary disc valve, Its just running two of the four TPI injectors at the moment, i.e. standard TPI. At some point when I learn more about this ecu Ill start blending in the A port injectors. They will come on as the pipe starts working. Autolube is connected to the power valve so only opens as the power valve does, on load. Oil is feed direct through to the bigend. I am running 80 to one pre mix as well in the E85 fuel.
https://youtu.be/977BWjCMC8E
https://youtu.be/bhKrRlZxomc
https://youtu.be/977BWjCMC8E
https://youtu.be/bhKrRlZxomc
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General Two Stroke Talk / Re: TPI
« on: August 30, 2019, 12:47:56 AM »
See that nice 7075 kick start. First kick and it split in half. Bugger, O well ill build another in steel. 4140, and get it nitrided. In steel I can make it thinner.
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General Two Stroke Talk / Re: TPI
« on: August 27, 2019, 09:03:21 PM »
All the gears shown earlier are inside the this case. Bob weight and kick start gear / spring etc. Its all ended up a bit wider than I expected but too bad just needs to run now. This is the 360 with mk2 injection. Although this case look bulky it all machined from blocks of 6061, thin, so it all weighs bugger all.
Kick start is machined from a piece of 7075 block. Worked out nice in the end.
Kick start is machined from a piece of 7075 block. Worked out nice in the end.
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General Two Stroke Talk / Re: 175
« on: August 26, 2019, 01:45:18 AM »
Seems, the money didn't eventuate, par for the course.
I'm keen to go ahead anyway. But I must finish this 360.
It's finally ready for wiring, a big job, left side kick start is complete.
With this new 175 I think I'll just stick to a conventional kick start after all, just easier and with my new hip I can kick start again.
I'm keen to go ahead anyway. But I must finish this 360.
It's finally ready for wiring, a big job, left side kick start is complete.
With this new 175 I think I'll just stick to a conventional kick start after all, just easier and with my new hip I can kick start again.
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General Two Stroke Talk / Re: 175
« on: August 13, 2019, 12:30:37 AM »
Steel I guess. Just that I got some intetest from a guy in the US wanting a 175 size engine for an offroad application. He seems keen on my Rotary Valve technology with the sliding Gibs and the tpi. I'm Looking at building a prototype for him, two in fact. But until I see money it's just talk but it's intetesting to know other peoples opinions. I'm keen on a 175 myself.
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General Two Stroke Talk / 175
« on: August 10, 2019, 01:57:15 PM »
What sort of interest would there be in a 175 size bike. Modern design, TPI etc? Just an over oversized / powered 125.
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General Two Stroke Talk / Re: TPI
« on: July 16, 2019, 11:40:53 PM »Flettner has anyone ever called you a mad scientist...
I've been called worse
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General Two Stroke Talk / Re: TPI
« on: July 15, 2019, 09:28:04 PM »
https://youtu.be/MxyTBXiaFQw
My new 175 piston, not fully machined outside yet and the lump on the top is so I can hold the piston while I finish the cutaways, ring groove etc. No gudgin hole to worry about fouling with exhaust and transfers ( short circuiting), exhaust on the new 175 cylinder will be simple bridged port but each port (2 exhaust ports) will exit the cylinder separately. Exhaust ports will be all the way round to half way. Max exhaust blow down time area. Bridge can be water cooled right up to the cylinder wall.
My new 175 piston, not fully machined outside yet and the lump on the top is so I can hold the piston while I finish the cutaways, ring groove etc. No gudgin hole to worry about fouling with exhaust and transfers ( short circuiting), exhaust on the new 175 cylinder will be simple bridged port but each port (2 exhaust ports) will exit the cylinder separately. Exhaust ports will be all the way round to half way. Max exhaust blow down time area. Bridge can be water cooled right up to the cylinder wall.
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General Two Stroke Talk / Re: TPI
« on: July 12, 2019, 01:40:27 AM »
shafts ground and parts assembled.
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General Two Stroke Talk / Re: TPI
« on: July 11, 2019, 02:11:37 AM »
All the kick start and left side bob weight drive stuff back from hardening. All 58 / 60 Rockwell. Bearing hardness.
The little splined shaft is Honda on the outside and Kawasaki spline on the inside, one way drive. Other wider gear is bob weight drive and kick start idler.
The little splined shaft is Honda on the outside and Kawasaki spline on the inside, one way drive. Other wider gear is bob weight drive and kick start idler.
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General Two Stroke Talk / Re: TPI
« on: July 05, 2019, 01:27:53 PM »
have spent a lot of time finishing off my home cast facility, finally a proper foundry I can still use on the wet days.
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General Two Stroke Talk / Re: TPI
« on: July 05, 2019, 01:22:15 PM »
yes, those bloody wires, there is enough of them. Just sent the last of the kick start components away for case hardening. Should see them back next week, then to make a case around them.