Engine Trouble one jug gasket instead of two? timing issues?

[jatgm1]

http://motorbicycling.com/showthread.php?t=6820
found something. this has side by side comparisons of the chinese and russian engines, by "riga" if im not mistaken, fantasticly similar, but obviously outdated, looks like it had some kind of manual ignition timing adjustment, and some other odd little features. never thought id be thanking the russians for any tech im running. retrofitting an old russian engine with modern parts could be quite interesting, everything would have to be custom machined though. i wonder how it would handle.

 

[FurryOnTheInside]

http://motorbicycling.com/showthread.php?t=6820
found something. this has side by side comparisons of the chinese and russian engines, by "riga" if im not mistaken, fantasticly similar, but obviously outdated, looks like it had some kind of manual ignition timing adjustment, and some other odd little features. never thought id be thanking the russians for any tech im running. retrofitting an old russian engine with modern parts could be quite interesting, everything would have to be custom machined though. i wonder how it would handle.

I would have thought you would be more interested in the frames.
Latvians BTW, are not Russians, lol.
Riga is the capital of Latvia. I guess after WWII the Soviets, like many of the allies needed to make super cheap transport for as many people as possible, with as little metal as possible and I think they got a great idea in the motorised bicycles, lightweight moped, whatever you'd call them.
Google images of Riga motor museum, lots of really great very cool looking classic light motor bikes and motor bicycles with frames that were made specifically for the purpose of getting as much function as possible out of very little vehicle. An ethos I think is still at the centre of MB

Oh and this:

 

[jatgm1]

your right about that, when my step dad saw my gas bicycle he said it reminded him of his old moped. quite nostalgic. especially the two stroke ones.

 

[jatgm1]

plus, apparently the d-8 and d-8e engines could use a normal bicycle frame. idk about the other models.

 

[Steve Best]

okay, added another gasket, (took forever to scrape the rest of the original gasket off) and now it does indeed perform better. i had no idea such a small thing could screw an engine up so much.

No sealer is needed on these engine if you use a gasket. Makes part swapping easy.
The beauty of these engines IS that small and easy changes make great power, if you know what you are doing.
Port timing, squish, loop scavenging, exhaust tuning, and most of all Gordon Jennings Two-Stroke Tuner's Guide are your secrets to success.

Steve

 

[jatgm1]

you know, thats what i figured, but while i was taking apart the cylinder, i realized that the head was leaking a little. thats why i sealed it and tightened it well.