KX Riders
Maintenance & Technical => KX500 Original => Topic started by: maddoggy on March 03, 2008, 02:43:19 PM
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i did a little research with the search option but couldn't find anything real convincing towards any specific brand or type. do you guys have any tech info to support the v-force, boysen rad valve, or the stock setup as being the best choice for noticable power. or do these different types just move the power around up or down the powerband. stewart, i'm sure you've dyno'ed them all, right?
MADDOGGY
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I don't have any direct experience with these two but my understanding is the the Rad valve is for top end power (drag/sand/ice), and the V-force is for everything else (MX/offroad). I am a big fan of the boysen dual-stage reeds. They are a low cost alternative and have served me well. I have used them on a variety of dirt/street bikes, always with noticable results. It was the first mod I did to my K5. Cam.
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I run the boysen rad valve. Its a good reed block, but I think that I read on here that the V-Force Dyno'd better. I doubt that there is V-force II's for the k5. Anyone know for sure ? I know they have no II's for the cr-5. V-force is the popular choice.
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v force 2.....is the best i have tried
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V force works great, but don't try them nitrous application, they will not hold up.
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Don,
I am curious. What part of the nitrous makes them not hold up. Thanks. Cam.
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cam, i wonder if don is refering to the nitrous being hard on reeds because of the extreme cold tempeture of the nitrous as it exits the bottle. hmmmm... maybe, maybe not. MADDOGGY
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hmmmm....wonder if nitrous fed combustion pulses the reeds closed just as hard as it forces the piston down?
Don46 ???
Thanks
Mark
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you guys are nuts...... is nitrous really that necessary???
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you guys are nuts...... is nitrous really that necessary???
Hey ma71t this is a friendly place, you don't need to start calling people names. :wink:
Mark
p.s. you gotta admit that you will check back to see what Don46 answers
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Has anyone tried the G3 Reed Valve from 1Dir Racing?
They talk them up a lot!
http://www.1dirracing.com/ (http://www.1dirracing.com/)
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First off I'm real leery of any one selling a part that fits a 2005 model KX500. They quit making the K5 in 2004.
Their quads and sand buggies look like they are made in China. All China bikes, quads, and sand buggies I have seen are junk.
If they can sell a China bike to a person, look them in the eye and say they got a good deal. I would question their integrity.
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I'm not sure what happened but two runs and there was only 1 pedal left on a brand new cage,not one side, one petal, needless to say it never went back in. I think I still have it, I'll get a picture and post it, total destruction. I don't know if it was the cold or the fact that there are no reed stops or what, the Bousen dual stage carbon reeds hold up, don;t know why the V force won't. and as for the question why nitrous :?, I guess because I can, there is no such thing as to much power. somebody said why did you buy a 500 and his response was because they don't make a 600 :-D
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i like that saying why did you buy a 500 becaquse they dont make a 600
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Sweet, I can run Nitrous :evil: All I need is a set of wheelie bars and a parachute. and I'll be good to go.
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you guys are nuts...... is nitrous really that necessary???
Hey ma71t this is a friendly place, you don't need to start calling people names. :wink:
Mark
p.s. you gotta admit that you will check back to see what Don46 answers
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my apologies sir.... " nitrous is a fantastic idea, why would you ever dream of running a kx500 on just mixed gas that would be a disgrace"
better?
-Adam
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:-D......ya came back to see the answer didn't ya!!!
Mark
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I went out to the garage to take a photo of the cage, I guess I'd taken the 1 petal left out, so there is nothing left but an empty cage.
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you guys are nuts...... is nitrous really that necessary???
Nitrous is only necessary for those of us that have nuts. Punannys need not apply. :lol: :lol: :lol: :lol: :lol: :lol:
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you guys are nuts...... is nitrous really that necessary???
Nitrous is only necessary for those of us that have nuts. Punannys need not apply. :lol: :lol: :lol: :lol: :lol: :lol:
yeah.....football, baseball, etc. only require one ball to play...... 8-)
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i dont think the v force reeds can handle the extreme cold weather at all and the cold nitrous destroys them had a set of v force 3's in 02 ski doo 800 it was 56 below without windchill started up the sled only had prob 50 miles on brand new blew the left reed cage compleatly out locked up my motor will never put v force in anything i ride in cold weather again lucky for me it just barly got the bottom of piston half day in cold woodshed got sled going again 600 dollars later finished up are riding trip!
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So the concensus seems to be the Boysen dual stage reeds are the best for offroad?
I hope this isn't too OT, but what is stock HP for a 2000 KX5? What would this reed kit add HP wise?
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Stewarts dyno says the VF2 are the best for power gain... The only bad thing I have heard about them is in regards to cold weather or nitrous as stated above. I'm sure anything is an improvement over stock.
-G
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VF2, only way to go. unless you ride in -30 degree weather or your drag racing with nitro.
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Hey Don, don't some guys inject the nitrous after the reeds? or does that throw a different curveball into the mix?
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I ride in some times 20 degree range. Would that be an issue? Whats the threshold of temperature considered too cold for these?
Any idea on whats a good price?
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you can run these reeds in cold temp.
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Hey Don, don't some guys inject the nitrous after the reeds? or does that throw a different curveball into the mix?
Kyle,
There are two different types of systems, a wet system and a dry system. The bike I had in Indiana had a dry system, its injected into the air boot between the filter and the carb. I think the wet system has more potential for higher HP gains. Cold Fusion (wet system) claims 100hp gain on a twin, seems a bit high but who knows.
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Do the spacers I find online do much for the bottom and mid range? Or just snake oil?
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Martin,
The space is a good mod for the KK500. I used the boysen dual-stage with very good results. I was too cheap to buy the VF3 and likely would have liked them too but the boysen was good. Cam.
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OK. From what I find, the VF2 reed assembly and the Boyesen spacer is going to be probably my first mod......
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OK. From what I find, the VF2 reed assembly and the Boyesen spacer is going to be probably my first mod......
check the for sale section. There is someone that is selling the spacer on there and you can probably get it for cheaper than what boyesen wants for it... i haven't bought one yet but i am also in the market for a spacer. let me know how it works out...
-charlie-
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http://www.kxriders.com/forums/index.php?topic=5009.msg39383;topicseen#msg39383