Two Stroke Motocross
Two Stroke Motocross Forum => General Two Stroke Talk => Topic started by: Flettner on May 12, 2019, 06:20:22 PM
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A big thank you to Ray Smith for resurrecting this site. Rebooting all the old stuff on My Fuel injection development has paid dividends in terms of a resource to show time lines for the development as it happened in real time. KTM recently tried to patent the TPI system, claiming they invented it. Actually a recent article put out by KTM now claims they accidentally " discovered'' TPI in 2014 , perhaps here on TSM I would say , but never the less a patent was applied for. TM, understanding that TPI was free for any manufacturer to use has set up and is starting to sell 300 TPI enduro bikes. They were unhappy that KTM tried to pull this greedy trick. They came to me for help to stop this patent application, understanding that I had done TPI first and published it . I pointed them to this web site where there is a time line on development. I have heard that the KTM patent application has been declined because of the appeal TM has put up, using TSM as a heads up. So this means TPI is now free for any manufacturer to use. Good for twostrokes.
Go buy a TM ;D
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You are welcome.
Your documentation of that design was how I found TSM in the first place. I was saddened by its loss when the server crashed and was a big part of why I worked to get the original content back.
I am glad it paid off.
(BTW my name is Ron :)
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Opps, sorry Ron , for some reason I always thought it was Ray? Please accept my apologies.
Im keen to post on my mk2 system but have promised TM I will keep mum about it at the moment. In the next few months will be make or brake, Im about to finally finish my 360 rotary valve revers cylinder mk2 TPI engine, Ive told TM if they do not do something with mk2 TPI by then, I'm publishing it, here.
I can and will post some update pictures, just with a rag over the cylinder for now, there is a lot more to this engine apart from just the mk2 TPI.
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I am looking forward to seeing your next masterpiece!
--Ron.
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Flettner I always enjoyed following your TPI research (even it much of it was WAY over my head)... Looking forward to see what you've been working on... Please post when you can. 8)
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https://youtu.be/bhKrRlZxomc
New rotary valve timing adjuster and throttle, all in one.
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wig blown back!
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Looks like you still need to connect a few wires... lol
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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.
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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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When all said and done flettner, I believe a book is in order.
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That foundry is some top notch stuff... awesome work.
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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.
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shafts ground and parts assembled.
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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.
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Flettner has anyone ever called you a mad scientist... ;D
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Flettner has anyone ever called you a mad scientist... ;D
I've been called worse ;D
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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.
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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.