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

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

[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.