What are the benefits of case reed engines

Tim Paint

New Member
Oct 3, 2019
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Hey guys I’m very new and I am reading as much as I can to understand more about these small engines. I’m fairly good with mechanics and somewhat have an understanding of a small two stroke motor. But I figure it might just be easier to ask the professionals. What kind of benefits do you get from a case reed engine versus say the same kind that is not??? I would really like to buy one of these motors from that Fred guy at CR Machinery, I think that’s it. The YouTube videos of how he improves his engines is impressive. They are expensive but from what I understand the quality is there. If anyone responds thanks for taking the time.
 

Jerdoggiedog

New Member
Jun 3, 2021
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I have a GT7 Reed valve motor i just bought a month ago and it fired up after I put it together.i started breaking it in and i can't get it to run right at all.ive gone through everything.i need a real mechanic to look at this piece of garbage.im gonna buy another motor.or a drill so I can turn the motor over easier.
 

Larry Trotter

Active Member
Nov 26, 2017
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Reed valve engines have some advantages because they supply fuel/air on demand. They also have limits depending on their design and construction. The reeds can only open and close so fast and making them able to close faster also makes them open slower. Personally I prefer rotary valve or piston port engines but some people aware by them. Piston port is most simple and reliable.
 

Jerdoggiedog

New Member
Jun 3, 2021
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Reed valve engines have some advantages because they supply fuel/air on demand. They also have limits depending on their design and construction. The reeds can only open and close so fast and making them able to close faster also makes them open slower. Personally I prefer rotary valve or piston port engines but some people aware by them. Piston port is most simple and reliable.
I'm losing my mind lol this engine suks
 

Jerdoggiedog

New Member
Jun 3, 2021
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I kinda want to get the YD 100 or the Zeda 100 with the Reed valve, it would be nice if I could figure out my problem with this one. I tried running it to say and no luck it took 15 minutes to get it to run for 30 seconds. Then it wouldn't start. It keeps trying to start then it sounds like it ran outa gas.
 

Jerdoggiedog

New Member
Jun 3, 2021
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I kinda want to get the YD 100 or the Zeda 100 with the Reed valve, it would be nice if I could figure out my problem with this one. I tried running it to say and no luck it took 15 minutes to get it to run for 30 seconds. Then it wouldn't start. It keeps trying to start then it sounds like it ran outa gas.
And this is with the stock carb now because I took the Reed valve off probably a week or two ago.
 

Jerdoggiedog

New Member
Jun 3, 2021
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The motor I really want is one of the RDM racing stroker Rod and crank motors. They claim to put out about 16 and a half horsepower.
 

Jerdoggiedog

New Member
Jun 3, 2021
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A reed valve motor won’t run without the reed. But you probably have know that.
Yes it will, but I I don't know how good now. It ran normal then well it doesn't want to run normal now. I have a Copper headgasket coming and I'm gonna get some of the stuff to seal the Reed box. Then put it back on and see what it does. I still need to get a volt meter and check if the spark supply is what it's supposed to be at. And I would rather start it with a drill. That craps too much pedaling.
 

JerryAssburger

Active Member
Mar 11, 2017
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Salem Oregon
To the Original Poster, a reed valve design definitely helps fatten up the low to mid rpm performance, and since these motors, (for the most part) don't spin much above 7000 rpm without vibrating or self-destructing, I'd think a reed set up wouldn't affect the top-end too much. A fun project would be a YD100 with reed set up, balanced and set up for 6000 rpm and down. You could probably pull a 32T back sprocket easily and not piss off the neighbors 3 blocks away, too. Win-win.