The big Box style of Reed Valve lets the engine "breath" so much better. I've tried both.
@EarthSurferUSA
6 ай бұрын
I have been building reed engines from piston port engines for 20 years now, starting with Go-ped and mostly now for RC cars (1/5th scale cars), and I first learned about then growing up with motocross as they went from piston port engines to reed valves in the 70's. The engines I work with are a 30cc (some a bit higher and lower, but most the same family of engines with interchangeable parts) made by Huskvarna/Zenoah, (Husky bought the engine line from Kamatsu years back). The reed valve is a totally different intake design than the piston port, but a piston port can be properly converted to a red valve. I don't know how well designed that reed is for that engine, (would have to measure them both), but my typical mods to transfer a piston port to a reed is pretty much this, (sans the port time area calculations) 1) Cut a new transfer port up the back of the cylinder at the same height as the rear transfers, with the roof pointing toward the spark plug. 2) Cut a window in the intake side of the piston to feed that port. If a cylinder reed, a half moon shape on the intake piston skirt helps fill the cases. 3) You are now able to open the exhaust port more to match the added transfer time area at your target peak power rpm. 4) Epoxy can be used (regular JB weld is good) for thin spots of the casting if the extra port gets close. Add the reed, and shorten that super long intake track between the carb and the engine. Add a good tuned pipe, re-jet the carb, and I can see that engine easily triple in power. We get an honest 7hp from a 29.5cc engine, running on gas, that can rev to 12,000 rpm. They don't make any power to speak of below 7,000rpm, so they idle at 4,000 and most clutches start kicking in at 8000, or higher. Strong enough to use for go-kart racing, (tiny cars with adults in them), with one of my reed engines (made from Trevor Simpson reed cases though), set the track record,---then was banned. :) Doug in Michigan ESP (Earth Surfer Performance)
@smknindos
6 жыл бұрын
I'm loving the myth busters thing. Good stuff
@mstzmikebsteviec1119
4 жыл бұрын
Love these videos me and my brother learned a lot from you guys I learn mostly what I know from two-stroke dirt bikes growing up it it's really cool to see you guys applying a lot of those message and being able to dyno test everything really does show a lot of cool stuff that most people would have to just here and try and feel if it does or doesn't definitely keep making videos and I will keep watching.
@joegrassel
2 жыл бұрын
This video helped me a lot. I was having problems with blowback into the carb. It melted the guard between the carb and roasted the filter sponge. I switched from piston port to reed valve. It went down pretty much like this video at first. I bolted on a G2 reed valve. It solved the blowback but no hp gains. It did run a lot smoother and revved higher. I cut a small window into the piston next. No gain but even smoother and more revs. I then added a transfer port from the intake to the case. Boom, low end torque and sweet top end speed/power.
@CuddlyJon
2 жыл бұрын
My performance actually worsened with a reed valve. Use to hit 35mph with just stock piston port and ever since I got the reed valve. I'm lucky if I hit 30mph. Don't know what I got wrong.
@sethsengines212
2 жыл бұрын
@@CuddlyJon most likely jetting in the carb with the different airflow you might need to richen your mixture but idk it worked for me 🤷
@Force1Com
Жыл бұрын
@@CuddlyJona lot of people having leaks all in their stuff because of poor machining of parts
@jakeelliotmarshall
6 ай бұрын
Hey Joe could you explain more on that added transfer port? Do you trench that transfer or are you literally putting a hole through the floor of the intake?
@MrChico809
2 жыл бұрын
I would also like to add when you reduced the runner length on the intake you killed the top end rpm. Would like to see a mythbusting video on that. I wouldn't go ridiculous on it but i do believe that it could pick up HP if the intake runner was longer. Nice video!
@albundy4370
5 жыл бұрын
U know this is all legit and I respect him for testing his own products and telling the truth and proving that his product doesn't help the house man I give u respect
@willardbuchanan9122
6 жыл бұрын
You guys made the banana expansion chamber Muffler have you tried one of those to see how much power can make or Torque
@sherlocbum9782
2 жыл бұрын
U should have shown more of the computer reading while it's running n show the reading of rpm horsepower n temp. + should of show comparisons of both vid reading of computer screen diagram
@willardbuchanan9122
6 жыл бұрын
What about the OZ Super Magneto vs to 12 volt Magneto
@MM-pv8zp
3 жыл бұрын
dont you need a windowed piston to use a reed valve for the carb
@brandongill4542
2 жыл бұрын
Yup
@danielerlenmeyer7566
3 жыл бұрын
Bolt ons "don't work" for you, because your only doing the wrench turning. You have to tune your air/fuel mixture to see any actual performance gains.
@bagelbitesslightlyundercoo7958
3 жыл бұрын
Theres more to it than just that
@rdhudon7469
2 жыл бұрын
Also a reed valve works best with a windowed piston to experience the full gain .
@sherlocbum9782
5 жыл бұрын
Could you put. 2 Grove ports on the cylinder block chamber to let the engine breathe better
@MeiGunner
2 жыл бұрын
3:20 i would of love to see the Chart ..
@avragegamer8864
2 ай бұрын
the reed valve design might be the problem...it looks more restrictive than the stock intake and carbon fiber is way too stiff for these motors...and furthermore you can raise compression and change your timing in these motors with the right tools and know how...
@THAYBANHLOT
4 жыл бұрын
I love your work doing. Because I also have done the work from my habit
@avragegamer8864
2 ай бұрын
what about a set up with a reed valve and an expansion chamber but still no windowed piston?
@motorizedbicyclenation53cu90
Жыл бұрын
Quick answer: no not really especially not without windowed piston in fact it drops the peak Hp if ya stuff the crank port the cylinder add a pipe ya can get it all back and more… but… it would be more power without the reed..
@bradjohnson8100
4 жыл бұрын
I just purchased the yd100 bicycle kit on Ebay from bicycle motor works. I just finished my OCC Stingray chopper build and today I started the engine for the first time. It started immediately. The problem I am having is that it doesn't have much of an rpm range and wants to die. I screwed the one carburetor adjustment screw in several turns and out but nothing changed. I changed the plug gap to .o35 rather than the .022 that it came with. Not much a mechanic and could use some advice.
@bradjohnson8100
4 жыл бұрын
@@4HUNNIDZ It was the carburetor. The Ebay seller sent me a new one free of charge and the engine fired up immediately. Better late than never. Thanks.
@mikeriley818
Жыл бұрын
Great video, I love how you are using a Dyno for these tests. I have to point out though, torque IS the important factor, not horsepower, remember you feel torque. Horsepower is just torque at a given RPM. (Before anybody calls me out, it's Torque X RPM ÷ 5252)
@Force1Com
Жыл бұрын
Horse power is torque times rpm, let that sink in for a second ninja. If you don't like your torque, you can change the sprocket, if you have enough horsepower
@Force1Com
Жыл бұрын
Or in other words, no horsepower, no torque. You can't say horsepower is of no consequence when they are directly proportional.
@chambliziOfficialChannel
6 жыл бұрын
The machine louder😂😂😂
@joegates3638
6 жыл бұрын
The Reed valve needs more fuel it creates a slower suck need larger Jets
@arrepuess
4 жыл бұрын
I think they also need cyl intake boost port
@arincstingray611
4 жыл бұрын
ReedValve Carbon fiber vs Fiber glass ... Which 1 better n why .
@coreypierce4888
6 жыл бұрын
I noticed my reed valve gave me a more torque bottom end.
@drewheskett324
6 жыл бұрын
Wait, since when do the zeda 80 have injection molded cylinders?
@bobgreene5460
6 жыл бұрын
Stock pipe doesn't do anything with these bolt on upgrades. Definitely show's, pipe up first!
@thrifty9797
4 жыл бұрын
Some were injection molded, some were cast
@jett-rampartflyer2852
4 жыл бұрын
Darren says he's sorry and wants to come back. He said he been stressed out cuz he knocked up his daughter and neither of them are working rn.
@checkoutsmolikperformance223
4 жыл бұрын
Jett-Rampart Flyer lol omg
@freakysteve140281
4 жыл бұрын
It’d be good to see fuel ratio changes or egt temps with a straight swap on the bolt on parts instead of hp readings
@jimfitzgibbon5492
5 жыл бұрын
Ask racing kart people if reeds work? Some of the fastest two stroke in the world are reed engines. The only ones that make more HP are rotary disc valve engines. I do not doubt your pulls but must wonder if that reed set up has enough reed area & choking the flow. Something is not right in that set up.
@checkoutsmolikperformance223
5 жыл бұрын
Jim Fitzgibbon they don’t work without the proper port work. Check out other videos. We run reeds on everything
@jimfitzgibbon5492
11 ай бұрын
@@checkoutsmolikperformance223 Well that is a false statement. The stock euro kart racing engines have used reed valves for ever. Bud I owned a racing kart shop for several years. In fact I was the #2 seller of Yamaha Racing kart engines is the US. We had the IKF 1978 Grand Nationals at our Track. I have built more karting racing engines in my carrier from piston port, Reed& Rotary valve engines than I can count. Look what the fastest StockTwo stroke Motor Cross bikes run. I,m not trying to attack you but Two strokes running under 10000 to1200 rpm benefit greatly from reeds If there set up right. The reeds do need to have to intake feeding the lower Case as the piston skirt is closing, that’s why a window is needed in the piston . What ever you want to believe. I,m open to discussion, be never to argument .
@josephrogers6010
6 жыл бұрын
Love it
@biged8434
4 жыл бұрын
Reed valve definitely does something... These are Chinese made motors... Some are good most are bad. These guys must struggle with understanding atomizing air/fuel mixtures.
@flyingsky1559
2 жыл бұрын
Forgot to retune
@Force1Com
Жыл бұрын
Lol
@fullmetaljacket7
3 жыл бұрын
2HP from an 80cc engine? What a joke
@MrThatnativeguy
6 жыл бұрын
3 dyno mythbusting videos in a row!!!! Was not expecting that but it’s great 👍
@sprockettv2927
5 жыл бұрын
O
@Konstantinosmo
3 жыл бұрын
Thank you guys for the videos you make. So, if understood right, if someone has a stock 80cc 2 stroke motor, the reed valve make the motor to lose the half of the power? There is no way to work right?
@jessemiller6912
3 жыл бұрын
they never tuned it
@pvt_mtbl9516
3 жыл бұрын
You need to add way bigger jets before it actually gives you benefits
@lunguinhoseries1646
4 жыл бұрын
you have a dealer in Brazil
@lilbig1717
3 жыл бұрын
Built turbo nitrous build? Plz??
@hugieflhr03
3 жыл бұрын
That reed valve was very stiff. It may not have opened
@patsmotorizedbicycles6943
5 жыл бұрын
Try adjusting the carb screw
@uploaded113redone
4 жыл бұрын
the carb screw or the jets , you can bore or solder a jet and adjust the pilot jet to change fuel ratios , adjusting your idle doesn't do shit though
@RY4NP
3 жыл бұрын
The reed petals look like they are stiff af
@albundy4370
5 жыл бұрын
Lol he said it was a new try but it was an old footage
@ravencruz7576
4 жыл бұрын
where can I order one! and what's the price! thank you.
@pvt_mtbl9516
3 жыл бұрын
You don't want one
@420fruitloops6
3 ай бұрын
Do realise the heads on backwards
@ravencruz7576
4 жыл бұрын
How much more power you get vs a chines 80cc.thanks
@Force1Com
Жыл бұрын
50 hp
@marquitosmmrd
5 жыл бұрын
Where did you buy this Dyno
@albundy4370
5 жыл бұрын
The pet store
@josuegonzalez3375
6 жыл бұрын
Oh men!! I bought this reed valve a month ago and the same thing happened to me, I thought I had air leak, bad gasket etc. Waste of money
@kjsmolik
6 жыл бұрын
Josue Gonzalez they work but you need to port the intake for the reed..the correct piston also.
@josuegonzalez3375
6 жыл бұрын
kjsmolik oh ok, I already did the port and correct the piston two days ago. I might install the reed valve today to give another try and I let you know if it works. Thanks alot kjsmolik9
@albundy4370
5 жыл бұрын
At least he had facts
@uploaded113redone
4 жыл бұрын
you either need to add a window to your piston or have an extra transfer port in your cylinder , They just need a little extra engine work to work properly
@impulseperformance4718
5 жыл бұрын
Do these engines not have a reed valve when stock
@udahoe24
5 жыл бұрын
No, when stock, these engines come with the angled intake manifold as seen in the beginning of the video
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