jd0x0
Scoot Junior
Posts: 12 
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Post by jd0x0 on Dec 6, 2016 21:51:30 GMT -5
Any merit to the dual stage power reeds like the Boyesen's on a 1e40QMB? www.boyesen.com/power-reeds-140.htmlGetting ready for a build off a cheap Chinese motor. I'm wondering if the dual stage is worth it over a cheap $30 'high performance reed intake' that come with CF reeds. I'm am looking for a fairly wide powerband (for a 2 stroke) with a lot of net power, rather than peak. |
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Post by drc174 on Dec 7, 2016 8:46:15 GMT -5
You will really never need a "powerband" with a CVT. A powercurve is supposed to be peaky, and you tell your variator to exactly shift at that peak. And your clutch will cut out all the dead rpm range before there
Therefore, Boyesen really arent helpful, as you never are in low rpm when you actually move.
They are THE SHIT on my vintage bikes though
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Post by Lucass2T on Dec 7, 2016 13:53:47 GMT -5
Boyesen reeds is the big competitor of Moto Tassinari V-force. But I think those dual reeds are on small 2t's more a gimmick than a real performance part because i hardly ever see them on anyhting smaller than 250cc. V-froce reeds are wayyy more popular (over here)...but maybe that only applies to the european continent? Anyway...those old aircooled 400-500cc tractors seem to benefit more from those 'power reeds' than the smaller watercooled engines. This is only my observation though.
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Post by humanshield on Dec 7, 2016 14:03:29 GMT -5
They are THE SHIT on my vintage bikes though In what way? |
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Post by drc174 on Dec 7, 2016 21:04:52 GMT -5
They are THE SHIT on my vintage bikes though In what way? If you have 1 thickness reeds you have three choices: Thin reeds: Open all the way at low RPM, they start to tumble and flutter (word?) at high rpm Thick reeds: Do not open wide at low rpm, but do not flutter Boyesen reeds: They open the center window up at low rpm, at higher rpm, the thicker outside reeds follow. They stabalize the whole thing. You get better flow at high rpm, more rpm is the result. More rpm = more speed if your transmission takes you there. When i said vintage, I meant LML engines on the Genuine Stellas. They come with SI20/20 carbs and LML 1 window reed valves. A little Dremeling and you can put on 605 Reeds from Boyesen. The bike had a lot more oomph in lower rpm and revved out higher and more stable. Could push from 52 - 57mph in third (out of four) on my wife's Stella. Have done the mod to 3 bikes now, everyone is freaking blown away. |
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sanec
Scoot Member
Posts: 69
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Post by sanec on Dec 8, 2016 19:17:44 GMT -5
i have the same engine and a question ? will i gain something if i open a bit more space for the reeds as shown on the picture bellow prntscr.com/dh43b0and which reeds are better metal ones or carbon ones? thanks |
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Post by 2stroked on Dec 12, 2016 14:02:57 GMT -5
Not entirely sure about the modifications you asked about, but I myself prefer CF or FG reeds to metallic petals. The major benefit being, if CF or FG reeds break , they won't chew up your crank. The same can not be said with metallic petals.
My one opinion on the modifications mentioned, If there were any marginal gain to be had, one if the major aftermarket companies would have long since cashed in. Meaning, It's true that our reed valves and intake tract aren't exactly perfect. In fact, far from it. It's small, choked and there isn't much we can do about it. A member here, 190Mech did manage to alter and install a reed valve intake from an MX engine onto a 1e40. I honestly can not remember the outcome, aside from the fact that it was unwieldily..
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sanec
Scoot Member
Posts: 69
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Post by sanec on Dec 15, 2016 9:27:25 GMT -5
i agree that i will not gain anything, and i agree for the problems that cause the reeds.i checked mine with a light under it and they were a bit opened so i ordered new ones, china made cause of my low budget, and thay came worst than mine. i tried every combo and still a bit light when exposed to light. so my next move was to make the surface of the reed contact smooth, which i successfully accomplished on a glass and water 1000 sand paper. thay are perfection now  thanks |
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Post by pinkflames420 on Mar 2, 2017 21:15:45 GMT -5
Just wondering if anyone has actually tried removing the reed stoppers as a way to let the reeds open as far as they can?
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Post by niz76 on Mar 2, 2017 21:25:28 GMT -5
Just wondering if anyone has actually tried removing the reed stoppers as a way to let the reeds open as far as they can? Not a good idea especially if using the stock metal reed petals. No fun if a metal reed breaks off for the engine to munch on! |
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Post by pinkflames420 on Mar 3, 2017 0:49:17 GMT -5
Just wondering if anyone has actually tried removing the reed stoppers as a way to let the reeds open as far as they can? Not a good idea especially if using the stock metal reed petals. No fun if a metal reed breaks off for the engine to munch on! Hmmm... I was looking to grab CF or FG reeds, just because there a better material and I read that they won't ruin the engine if they break,,,but if it's ESPECIALLY not good to take the stoppers off with stock reeds, like you say, then I'll just forget about that lol you guys know your stuff!!!!  |
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Post by milly on Nov 9, 2017 8:21:23 GMT -5
If you have 1 thickness reeds you have three choices: Thin reeds: Open all the way at low RPM, they start to tumble and flutter (word?) at high rpm Thick reeds: Do not open wide at low rpm, but do not flutter Boyesen reeds: They open the center window up at low rpm, at higher rpm, the thicker outside reeds follow. They stabalize the whole thing. You get better flow at high rpm, more rpm is the result. More rpm = more speed if your transmission takes you there. When i said vintage, I meant LML engines on the Genuine Stellas. They come with SI20/20 carbs and LML 1 window reed valves. A little Dremeling and you can put on 605 Reeds from Boyesen. The bike had a lot more oomph in lower rpm and revved out higher and more stable. Could push from 52 - 57mph in third (out of four) on my wife's Stella. Have done the mod to 3 bikes now, everyone is freaking blown away. DRC174, Do you have any link's or pics of doing this as I can then do it to my lml. Many thanks |
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Post by pigkut on Nov 15, 2017 20:31:04 GMT -5
I got dual stage boyseen reeds. I think they are “regular performance” thicknesses via Treatland. Throttle response is slightly better. Biggest difference is engine braking (IMO).
Are they better than carbon fiber? ...YES!
Would I recommend ithem?...YES!
And if you order from Treatland BUY 2 !!!! If not your just gonna have one side !!! LOL
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Post by pigkut on Nov 15, 2017 20:38:41 GMT -5
Not a good idea especially if using the stock metal reed petals. No fun if a metal reed breaks off for the engine to munch on! Hmmm... I was looking to grab CF or FG reeds, just because there a better material and I read that they won't ruin the engine if they break,,,but if it's ESPECIALLY not good to take the stoppers off with stock reeds, like you say, then I'll just forget about that lol you guys know your stuff!!!! I keep the Reed stoppers on.. but I flare em out as much as to it fits in the case. I also flare em out equally or what appears to be equally to me . |
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Post by MKDeuce on Nov 16, 2017 0:52:18 GMT -5
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