250r reed cage?

[PowerTech]

i have good reeds now in the stock cage. boysen 2 stage power reeds.

i am doing lots to my bike rite now and am tempted to upgrade .

is there any real advantage to replacing the cage with a piramid , V force , or rad valve.

i have read all the hype in there sales literature.but i want to know from some of your experience . if it realy is noticeable.

and what is up with the reed block spacer? it looks like total BS to me. and on top of that i think it would make my intake to air box boot even more of a PITA to instal. is this a good mod or a shiny cheap gimic?

i am running a 39mm flat slide off of a CR500.

[breastman569]

i looked at you signature and your runing about what i am except the rad vavle. i was in the same boat as you were but i went and got a used one off ebay and put some new reeds on it and yes it does make a big difference. also i dont know what type of ridding you do but since i ride mostly dunes i got rid of my air box and ran a 2stage UNI right off the back of the carb so i wouldnt have to deal with the air box crap. just my .02 but i think it really mad a difference.

[TtownJoeShow]

my 85 likes the brv, gave it quite a bit more pep, it seemed to put the power band quite a bit lower in the rpm's

don't mean to steal your thread, but,
i'm thinkin of putting my 38mm A/S carb on,,,,what kindof a difference did you notice with your bigger carb?

[PowerTech]

thats what i will get. a rad valve.


a larger carb is a must. go 40mm. great mod. no down side at all.

makes them fly.

[gravelord]

i hear V-force or the esr billet reed block are the way to go. dont go with boyseen or fmf rad valve - your not giong to notice a differnce over the boyseen power reeds from what i hear they are pretty much the same thing except for they have a spacer added onto them. a spacer gets rid of turbulence and mixes the air/fuel better because it gives it time to mix before it gets sucked into the engine. i added a torque spacer, and i have boyseen power reeds - i noticed smoother powerband and alittle more power then i had before all the fmf and boyseen rad valves are supposidly is a stock cage with a spacer, but just one complete assembly from what every one else tells me, only differnce is they give you a intake manifold as well (at least boyseen does)

[breastman569]

well if you have ever looked at a rad valve compared to stock you will see that it is way more open then stock it is like night and day difference between a stock and an aftermarket reed cage. secondly there is no spacer on the rad valve you can put one on at all its going to do is move the reeds out of the cage giving you alittle more top end.

[TtownJoeShow]

well if you have ever looked at a rad valve compared to stock you will see that it is way more open then stock it is like night and day difference between a stock and an aftermarket reed cage. secondly there is no spacer on the rad valve you can put one on at all its going to do is move the reeds out of the cage giving you alittle more top end.


i agree, there is a fairly big difference between the two.......Gravelord is just going by hear say :rolleyes:

40mm!!! i already have the 38mm A/S, i was planning on putting it in my 83 300cc jobie, now i'm :wondering lol shoulda bought the Banchee pair :drool: :drool: :mad:

[PowerTech]

when i am talking about carburetors or realy about anything. i will be thinking watercooled 250r.

i only know a little about the air cooled jobs . i never owned one .



smaller than 40mm i would say. you cant get as crazy with the ports on a air cooled 2 stroke as you can with a watercooled one , they will melt down

i would think your air cooled engine with a 300 jug would want a stock 86 250r carb or a 38mm

the stock 86 carb would be cool to put on with your 250cc jug.

[Pete]

reed spacers are a waste of money. They increase crankcase volume which softens and weakens the power delivery.

If you get a RAD valve, get the one from the CR, it is a better part compared to the TRX/ATC one.

[PowerTech]

with the CR rad valve does it line up good enough to my stock airbox/carb boot ?

[TtownJoeShow]

i know that the RAD04A one lines up just fine on the 85, i have the stock carb on and airbox

PowerTech, thanks for the info!!!!! these 2 toys are the first ones that i have ever beefed up, weird concidering i have owned quite a few toys lol

Edit; RAD04A = TRX 86-89, ATC250R 85-86

[PowerTech]

how about a 02E

[TtownJoeShow]

thats for a 2001 CR only, well acording to Dennis Kirk web site....so the bolts might not line up...
Anyone know when honda changed or if they changed the intake bolt pattern?
pretty sure they r the same through the 80's

[3leggeddog]

i got a reed cage from my old 01 cr250.they are different design,but bolt up to the 250r.it's layin here if you decide to go that route,drop me a pm,and we'll talk about a purchase


back to the v-force,pyramid,rad valve debate.i am not sure on the esr,but i know my v-force out performs a boyseen.i had a r with the boyseen setup,and switched to the v-force.made a pretty good bit of difference.never ran the esr,or duncan.i'm sure they are good product though.any aftermaket reed setup is gonna yeild some power gain.

[PowerTech]

i know they bolt up. what i am wondering about is the angle of the neck on the CR rad valve if it will give me trouble lining up to the airbox boot.


i think i will go with a ATC/TRX valve or the V force.

i apreciate all of this feedback , thanks dudes.

[PowerTech]

well how about the 86-01 CR250 VFORCE 3 reeds ?

i can get that for 120 bucks new.

[ceaserthethird]

Any Up-Dates ?

[dizasterzrfun69]

anyone know where to get a g-3 reed cage for an R?

[NOS_350X]

Go with the Pyamrid reed cage from Duncan racing. Guarinteed you will be satisfied with it. By far the best cage out.

[oldsking86]

People have different tastes.. I personally like the Vforce reeds on my R, the stage 2 worked out really well because there wasn't to much fuel dumped in by them but just enough that a hotter plugged made it just roar on the top end!

[Yamahondaman]

Go with the Pyamrid reed cage from Duncan racing. Guarinteed you will be satisfied with it. By far the best cage out.
:naughty: :naughty: :naughty: :naughty:

[ceaserthethird]

Any Have the - Delta V Force 3 Reed System ?

Yamahondaman what do you think ?

[Bryan Raffa]

Go with the Pyamrid reed cage from Duncan racing. Guarinteed you will be satisfied with it. By far the best cage out.

I have also heard Great reviews on that cage too!!:p

[Bryan Raffa]

wonder how well these work...8 petel....
http://1dirracing.com/catalogs/product.php?productid=16133&cat=265&page=1

71.40 CFM!!!!!!!!

[cr480r]

71.40 CFM!!!!!!!!

Sounds like a deceptive marketing technique to me... CFM ratings at constant vacuum conditions don't give any indication of reed control at high rpms. Soft reeds favor low-end, Stiffer ones favor top-end....bottom line... The only way to have both is V-force....The other companys can beat around the bush all they want... They are all limited by conventional designs... Double the amount of petals and they work half as hard...

[Yamahondaman]

Any Have the - Delta V Force 3 Reed System ?

Yamahondaman what do you think ?
i bought one .... used it and lost TOP END ....i "G A V E " it away a installed a CR Reed Cage with Boyesen Reeds and it ran 103 MPH ... But............ it had LOTS of other stuff on it like gearing and stuff,etc ... the Pyrimid is GOOD also if............
you HOG it out abit !! :naughty:
the Pyrimid is also on my TRI-Z Rag .....))))))))
=======
))))))))

[dizasterzrfun69]

Hey thanks Raffa, I was wearching the Net and couldnt find those dam things.

[JackFlack]

For those of you who don't recall that "exhilaration", here is an example of comparative Flow Bench testing for a 250cc;

G3 Power Gurve Reed Assembly 71.40 CFM
Boysen Rad Valve 250cc 64.68 CFM
Honda CR/TRX/ATC25OR 6-petal 54.60 CFM
FMF 250cc & Suzuki RM250 1987-89 6-petal 53.26 CFM
V-Force 53.00 CFM*
Pyramid 51.00 CFM*
Yamaha YZ250 1989 6 petal 50.40 CFM

(All tests were performed in house and *calculated at 10 inches of water pressure and room ambient temperatures, to best simulate atmospheric conditions).

http://www.1dirracing.com/250R.htm

[cr480r]

For those of you who don't recall that "exhilaration", here is an example of comparative Flow Bench testing for a 250cc;

G3 Power Gurve Reed Assembly 71.40 CFM
Boysen Rad Valve 250cc 64.68 CFM
Honda CR/TRX/ATC25OR 6-petal 54.60 CFM
FMF 250cc & Suzuki RM250 1987-89 6-petal 53.26 CFM
V-Force 53.00 CFM*
Pyramid 51.00 CFM*
Yamaha YZ250 1989 6 petal 50.40 CFM

(All tests were performed in house and *calculated at 10 inches of water pressure and room ambient temperatures, to best simulate atmospheric conditions).

How come it doesnt say what application of G3 or v-force was used? It was probably an 8 petal cage from a KX with some soft petals for the G3... And a CR80 application V-force cage....lol... I consider the flow test figures at a constant vacuum as an insult(from 1Dirracing)... A dyno test would be alot more informative.


[QUOTE=Yamahondaman]i bought one .... used it and lost TOP END ....i "G A V E " it away a installed a CR Reed Cage with Boyesen Reeds and it ran 103 MPH ...

I wonder if the non-adjustable reed stops on the V-3's had anything to do with your results? Maybe the reed petals were too soft for your application? IMO the V-2's are much better than V-3's... Did you use the dual-stage pro-series Boyesons?

[NOS_350X]

For those of you who don't recall that "exhilaration", here is an example of comparative Flow Bench testing for a 250cc;

G3 Power Gurve Reed Assembly 71.40 CFM
Boysen Rad Valve 250cc 64.68 CFM
Honda CR/TRX/ATC25OR 6-petal 54.60 CFM
FMF 250cc & Suzuki RM250 1987-89 6-petal 53.26 CFM
V-Force 53.00 CFM*
Pyramid 51.00 CFM*
Yamaha YZ250 1989 6 petal 50.40 CFM

(All tests were performed in house and *calculated at 10 inches of water pressure and room ambient temperatures, to best simulate atmospheric conditions).

http://www.1dirracing.com/250R.htm

Well i wonder how accurate those numbers are. If i was testing my own product i would make it kill the comp also. Those numbers just dont seem right almost like somebody pulled the out of there a**. Its like the dyno results for quads, whoevers dyno it is, is going to be the highes HP bike.

[Yamahondaman]

[QUOTE=cr480rI wonder if the non-adjustable reed stops on the V-3's had anything to do with your results? Maybe the reed petals were too soft for your application? IMO the V-2's are much better than V-3's... Did you use the dual-stage pro-series Boyesons?[/QUOTE]
I Used the dual stage reeds... i have NO IDEA why people would buy them "closed up,small,UGLY" Thing's ...but i see LOTS of Banshees like them, and
i have fixed a couple of V-Force Cages with STOCK CR Reeds at several races with some sissors,razor blade and stuff because they fall apart...
i don't read books... nor do i use CFM Thingy's.... i use my Finger and Caliper's and my Instinct when i port Motor's ...what NOS Said is VERY CORRECT !!!