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Old 11-28-2017, 10:38 AM   #71 (permalink)
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Quote:
Originally Posted by Panther140 View Post
I've heard about it a lot, but I haven't been to it.
I just started riding on the street about two weeks ago. I used to race motocross, but never had a street legal bike or a Class M License until last week.

Looks like a really fun time though! How many people show up? Based on the pics, it looks like a Lot lol.
My best guess would be over 500 cycles - maybe significantly more.

You should take a ride this spring and check it out.

This was our group at the last one -




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Old 11-28-2017, 12:47 PM   #72 (permalink)
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My interest in powered paragliding has been rekindled, so at some point in the future I expect the engine will be 2-stroke. I think I read they are around 20 HP, which isn't too bad considering you wear it like a backpack.
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Old 12-13-2017, 03:43 PM   #73 (permalink)
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Thanks for the memories!

Thanks for all the pictures and the good memories that go with them. In 1973 my wife and I, plus camping gear, rode cross country on a 72 Yamaha 350. What a great trip!
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Old 12-19-2017, 02:28 AM   #74 (permalink)
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Old 01-04-2018, 05:02 PM   #75 (permalink)
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https://www.google.com/url?sa=t&rct=...6vjBxnVF5ZcEXN company with a non smoking no mix 2cycle? Not the only ones but 2cycle is back.
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Old 01-04-2018, 05:14 PM   #76 (permalink)
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Some years ago there was a Brazilian who deveoped a device that allowed 2-stroke engines to operate without pre-mix, relying on oil recirculation instead. But anyway, I wonder if that Ryger engine would effectively overcome the NOx issue that halted the development of the direct-injection Orbital engine for automotive applications.
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Old 01-04-2018, 09:20 PM   #77 (permalink)
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The way it appears to be laid out, it has sealed crank minor amount of oil getting to some top end. The benefit of a 2 cycle IE light weight 2x the power cycles. Guessed down side slightly more nox and co than conventional 4 stroke at least when new as valve seals guides seals all weep a tiny amount. I would suspect less than a broke in 4 stroke.

ps yes I know I keep saying 2cycle and I do know the difference using most common slag used.
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Old 01-05-2018, 05:29 PM   #78 (permalink)
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Not sure about NOx going higher on a 2-stroke as a general rule, since it's more related to combustion temperature. And all that amount of unburnt HC that go through the tailpipe might decrease temperature at least a little...
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Old 01-07-2018, 04:22 PM   #79 (permalink)
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Originally Posted by cRiPpLe_rOoStEr View Post
Not sure about NOx going higher on a 2-stroke as a general rule, since it's more related to combustion temperature. And all that amount of unburnt HC that go through the tailpipe might decrease temperature at least a little...
I was not referring to a older 2cycle but compared to a proper running 4 stroke thinking is less time for heat to leave chamber but this is simply speculation without better data.
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Old 01-07-2018, 09:17 PM   #80 (permalink)
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I was not referring to a older 2cycle but compared to a proper running 4 stroke thinking is less time for heat to leave chamber but this is simply speculation without better data.
The air/fuel flow pattern might have been set to address this issue and improve the cooling.

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