the multi petal reed is supposed to increase response time for the reed therefore increasing crank case compression and smoothing out high speed fluttering of the acceleration.
the multi petal reed is supposed to increase response time for the reed therefore increasing crank case compression and smoothing out high speed fluttering of the acceleration.
correct if you're using cheap china reeds but if you're using high quality carbon fibre italian reeds you'll never have a problem with fluttering or response. the best 2 stroke engines use single pedal reeds look at the watercooled engines they dont use multiple pedals just 2 big pedals and they rev far beyond a cag engine and they simply do not flutter or ruin response. not to mention those reeds are even bigger then the ada cage reeds. but no one ever uses real italian parts in a cag engine everyone goes for the china parts cuz its cheaper you get what you pay for and polini reeds are a direct bolt on to the ada cage they just need trimmed at the bottom cuz the reeds are longer then the cage. but expect to pay $130 for that set up.
gianinnis 8 pedal set up is something special and one of a kind instead of a normal cage with 2 surfaces to mount reeds v it has vv 4 surfaces with 2 pedals on each surface truly one of a kind. but this doesnt mean an ada cage with the center bars cut with single polini blues wont kick as5! far better then any black widow/ada fiberglass reeds but its important to be fully modded in order to use this set up.
Last edited by sr20hardbody : 05-08-2008 at 08:04 AM.
You make a lot of good points. But if you notice the title of this thread starts with "Cheap" and goes from there. $130 for a reed cage when the whole cag costs around $200? Not really worth it.
This is a suggestion of a modification and something for people to experiment with. I made one and it works great, thought i would share the info with everyone.
Also, after reading about how a reed works and the purpose of them, I honestly would not removed the center bar of the reed cage. I would enlarge the wholes to maximum size, but removing the bar would mean that there is a permanent hole in the reed area and can cause you to lose crankcase compression/preasure which will noticeably decrease low end power.
not if you're using single piece reeds theres no chance of a leak since the reed fully covers the bar so the bar is actually in the way causing the mixture to collide with it turning an atomized mix back into dribbling gas and i understand the cheap mod but instead of doing all that and buying more cheap reeds its not gonna do much i've tried it it's not really worth it (black widow reed). what made a difference on the stock reed spacer was cutting that center bar out and in order to do this just buy a sheet of polini green reed $30 (polini blue if using an actual cage) then cut to size this will actually make a big noticeable difference just trying to help.
I agree, removing the middle bar and using a single petal reed would work fine. But it will not work for a duel petal reed. For the duel petal reed, you port the holes to the max.
Well if you have the reeds availible or purchased without prior knowledge, its a great way to use reeds you might have laying around.
What exactly do you mean by polini green reed? Is this a sheet of material or a single petal reed?
You make a lot of good points. But if you notice the title of this thread starts with "Cheap" and goes from there. $130 for a reed cage when the whole cag costs around $200? Not really worth it.
This is a suggestion of a modification and something for people to experiment with. I made one and it works great, thought i would share the info with everyone.
Also, after reading about how a reed works and the purpose of them, I honestly would not removed the center bar of the reed cage. I would enlarge the wholes to maximum size, but removing the bar would mean that there is a permanent hole in the reed area and can cause you to lose crankcase compression/preasure which will noticeably decrease low end power.
Not true!!
I am using the polini C/F reed mod with the center bar cut out on our A/C cag . the rubber seal goes around the outside even with the center bar cut out and since were using a 1 piece reed that covers that rubber area it seals fine. This has made a huge improvement in top end and excelleration.
I will post a pic of it as I am getting ready to pull the spare stock carb to put the ported carb back on .
You are picking only a small part of thread to call "not true!!", i stated that removing the bar on a dual petal reed is a bad idea, if you close the whole with a single petal reed, you won't have a problem.
As the reed acts like a check valve (one way vlv) to keep the piston from blowing the charged air back into the carb when it travels upwards for compression. As the compression builds above the pistion, some of the charged air/gas is pushed down while the ports are still open. Without the reed this pressure is pushed back into the carb.
I agree, removing the middle bar and using a single petal reed would work fine. But it will not work for a duel petal reed. For the duel petal reed, you port the holes to the max.
Well if you have the reeds availible or purchased without prior knowledge, its a great way to use reeds you might have laying around.
What exactly do you mean by polini green reed? Is this a sheet of material or a single petal reed?
polini green reed is stiffer (thicker) then the blue so blue if using a real cage since the cag engine isnt powerful enough to snap open dual greens. on a stock cag reed spacer (wouldnt call it a cage) use the green never tried blue nor has standardracer i believe cuz the green works wonders!
now for the good part!!!! its about $30 for a sheet of polini reed which is enough to make about 5-6 cag reeds so by buying it making a few you can then sell them for a cheap price and get all your money back so its free! cant get any better then that for that cheap lol
ohh and about the ada cage center bars cut with polini blues thats the ultimate not the cheapest besides Gianninis stuff.
Last edited by sr20hardbody : 05-08-2008 at 10:03 AM.
now how is this bad info? obviously we've been there done that and found an even cheaper and better alternative to modding the stock reed spacer. all we were doing is adding some of our experianced knowledge to help you guys out that dont know what the hell you are doing to help save you some cash so you dont go down the rode i went down ($800 into a cag) but by spending that much and dealing with all the crap we've found out what works what doesnt whats worth it and whats not.
You are picking only a small part of thread to call "not true!!", i stated that removing the bar on a dual petal reed is a bad idea, if you close the whole with a single petal reed, you won't have a problem.
As the reed acts like a check valve (one way vlv) to keep the piston from blowing the charged air back into the carb when it travels upwards for compression. As the compression builds above the pistion, some of the charged air/gas is pushed down while the ports are still open. Without the reed this pressure is pushed back into the carb.
So sorry about the not true thing . i used your quote on that and it was for the stock reed block mod not the ada reed cage. Big difference there..LOL. I was talking about the cheap to free mods not the high dollar ones. and this mod allows about 20% more flow / air fuel mix/ velocity through the reed assembly. Its a proven mod that works very very well . The Polini C/F reed material is one of the best out there to do this reed mod with . Like 20 stated you buy one sheet and sell the rest and your mod is free plus your time of course but the simple mod takes about 20 min start to finish . Cheap almost free easy HP. and like he stated it flows so much more that you actually need to rejet for this mod . if that alone tell you anything more air/ fuel mix intake means more velocity which means more power
thank you standard! im not trying to ruin davations thread if anything i give him credit for using his brain instead of making another pointless thread. im just trying to direct you guys in the right direction that way when you ride your bike you get a smile not ehhh that didnt do much maybe a little i think i can feel a difference.
if you do the polini mod you will definitly feel a difference theres no question of coarse you most likely will have to rejet to get the full potential or you might blow your engine cuz it provides that much more of an increase in performance. you'll be able to distinctivly hear the powerband kick in its that insane! like a honda type r engine when vtec engages.
There are guy that claim they have tried this and it wouldnt work on there bike the reeds were too stiff for a 47cc cylinder.
B>S>!!!!!! It might not work on a stock bike but on a modded bike with a 47cc cylinder it will because thats what were using. I have also tried this combo on a 49cc 3d boost ported ADA kit and its awesome. and once again almost free!!!!
no it works on a stock engine too!!! my neighbors pocket quad is completly stock and i did the polini mod and it absolutly rips! lucked out and didnt have to rejet cuz it was already running rich stock so this made it optimal.
a week after i did it 3 of my other neighbors came over and asked "what the hell did you do to that thing?" i started laughing and told them i gave it the polini touch.
i see what you guys are saying, but it isnt the same. maybe a great mod, but not as cheap or easy as the one davation mentioned. maybe it is better, and maybe it is free after you pawn off the rest of the plastic, but the initial investment is still quadruple.
Its not plastic its carbon fiber material . and its really no more investment than buying a set of good fiberglass or C/F reeds.
Mid South Mini Moto sell the C/F sheets and i have seen some on ebay from time to time .
and i understand the cheap mod but instead of doing all that and buying more cheap reeds its not gonna do much i've tried it it's not really worth it (black widow reed). what made a difference on the stock reed spacer was cutting that center bar out and in order to do this just buy a sheet of polini green reed $30 (polini blue if using an actual cage) then cut to size this will actually make a big noticeable difference just trying to help.
obviously we've been there done that and found an even cheaper and better alternative to modding the stock reed spacer. all we were doing is adding some of our experianced knowledge to help you guys out that dont know what the hell you are doing to help save you some cash so you dont go down the rode i went down ($800 into a cag) but by spending that much and dealing with all the crap we've found out what works what doesnt whats worth it and whats not.
