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Posted by: reconranger
My buddy pulled his off, and it is still easy for the kids to control. I say just pull it off, and use the throtle limiter screw for control of the power.
Posted by: reconranger
I will ask my buddy about the procedure, and post it. Is it not in the owner's manual????????
Posted by: reconranger
There is also a GREEN WIRE MOD. Find the CDI (somewhere at the back???), and unplug the green wire. It is a rev limiter.
What my buddy described for the ring removal seemed a little different than the pictures. He said that behind the kick starter is a plate that you remove. Behind it is the belt and pullies. Remove the bolt holding the larger (?) one together, and take it apart and remove the ring. Put it all back together............
Posted by: Doctorturbo
I don't know your quad but on most of the little quads they have a collar or restrictor in the carb throat and some have them in the exhaust. That is where I would look first.
Posted by: Nevermore98
All, I found an exploded parts diagram here:
http://www.powersportseast.com...e_selec...i&year=2007
Select the belt converter diagram for the KFX90.
It looks like the spacer that needs to be removed is part # 92026A. Can anyone confirm?
Posted by: Honeyduck96
The restricting ring on the front pulley is what limits the top speed the most. Even if you remove the rev limit by modding the CDI, the quad won't go much faster. The collar in the front pulley needs to be removed. It prevents the pulley halves from squeezing together far enough to allow the belt to ride up to the top of the groove, thus no top speed.
Posted by: 1128633636
I was just reading the thread for fun, and I found I was getting irritated over the cr-p we have to go thru to open stock bikes up....Darn (good word) on the old lt-80 it was a simple washer here and there.... Now the law-suit scared bike builders are telling us something?????? You keep sueing us for the stupid cra-- our kids do; we'll keep making it more difficult for you to make it faster. In sadness; the major mfgs have said we can parent our kids anymore so there'r going to do it for us......Sucks doesn't it.....
Posted by: magg7
Its in the tranny. Easy to remove most dealersdont know much about the 06 models.Check your manual it gives you an idea of where its at. Once u remove it it alows the belt in thr tranny to go deeper in the pully. I have a suzuki so i think its the same thing. Try to find a service manual on e-bay for step by step. Hope it goes well for you. By the way whats the top speed on those 90s?
Posted by: magg7
I think suzuki and kawi share alot of there stuff. Hers some pics from my book hopefully it helps you out on what it is and where its at. Once you remove the side cover you need to remove the starter cup and face nut then you will see the little ring in the pic. Just pull it out and put it back together. The spec. too is just so when you try to loosen the nut the face nut wont move try to figure out how to hold it from spinning when you loosen so the nut screws off. Hope this helps. side cover
Posted by: magg7
Thos is another piclittle more detail Dont remove the clutch housing. The ring or collar is behind the fixed drive face. See pic
Posted by: Bieci
We bought 2 of these quads for our triplets and they are dogs in the higher gears with this limiter in place.
Does anyone know where the Maximum speed reduction collar from th drive train system is? The owners manual states that it exists and it needs to be removed to gain full power. The dealer service dept does not know anything either??
Thanks ahead of time and Happy riding!
Posted by: Bieci
Where is it? We went on the Kawasaki website and looked up parts and could not find anything that was called the speed reduction collar. I am sure my husband can remove it if we knew what to remove.
THanks
Posted by: Bieci
We checked the exhaust, the KTZ90 product manual states that the speed reduction collar is in the ...drive train system and that a special tool is needed to remove it. Without taking the whole drive train apart, it is not obvious as to where this collar is located. We also have the 2004 TRX 90 and removed those restrictors in it a while ago. This quad (KFX 90) does not seem to have the same restrictors and so far nobody knows where this reduction collar is located in the drive train system???
Thanks,
Posted by: Bieci
The KFX 90 is a 2007 and we have looked so far we have not been able to locate a service manual. The Kawasaki web site shows diagrams of different parts of this quad. There is no part labeled speed reduction collar in the drive train diagram. So far we have not been able to check the top speed. My husband drove it up the street and he felt it did not go much faster then the kids old 50's. Our 2004 Trx 90 w/o mods except a new airfilter tops out at around 35mph with our older daughter who is 105#. My husband read on this forum that there is a pink wire coming out of the engine wire bundle that supposedly limits the top end. Cutting this wire allows the TRX 90 to reach full speed. My husband has not verified this information yet, this is just what he read on this forum.
Posted by: Bieci
Thanks for the Pic's, was this from a Suzuki 80 service manual? My husband will "play" this weekend with the new quads.
Thanks for all the other imput from everybody as well.
Posted by: bassinms
I would be very interested in what you find along with what you think of the kawi 90. I am getting ready to buy 2 for my boys and not sure that I like what I here. How old are you kids?
Please let me know what you think about these quads. They are new to market so it might be hard to find information. I did see something on what you are talking about and will pass along the information as I receive it.
Posted by: AIRMOBILE101
I have a service manual for a 07 KFX50. If you need directions on how to remove collar, then let me know!!!
Posted by: AIRMOBILE101
There is no green wire to cut on the 07 KFX50. Don't cut it , otherwise your bike wont start!!!!! Im trying to figure out how to post some pics of this , but unfortunately Im a PC idiot.
Posted by: AIRMOBILE101
Removing that collar will open that baby up!!!!! Now if I only could figure out how to modify or buy a CDI that will let this little thing rev a little bit more. Oh , If you wanna get a front sprocket with more teeth(for higher top end) , Rebelgears.com has them. Part# 333 . Just tell them how many teeth you need. I opted for only one more than stock(16T). I think it was like 25 or 26 dollars. Not the best price , but I finally got one. Its the same part# as some E-TON'S and the 2001 polaris Predator 50 if I remember. 17T is the max with that 428 chain , otherwise you will need to buy a a extra link or two or o whole new chain.
Just thought I would throw that out there since everyone is looking for a little more speed for the kid's!!!
Posted by: AIRMOBILE101
I got a great idea(so I think). I wonder if that CDI on the KFX90 is the same as the KFX50. What I mean is I wonder if the rev limit is different from the two quads. Could any of you 07 KFX90 owners possibly give me a part# off the CDI on your quads? Also how many wires with colors plug into it? Please!!!!
Posted by: AIRMOBILE101
Walter , if its a 2007 or newer model , there is no wire to cut. you are gonna have to remove the speed restricing collar(washer).
Posted by: AIRMOBILE101
Ok , Im slowly making progess with this KFX50. I just installed a 28T rear sprocket(for a Kasea) and a 17T front sprocket . The hot wheels speed gun clocked my son @ 18MPHI also removed the variator weights( the 6 rollers) and installed lighter ones . I also replaced the three rear clutch springs w/ 2000rpm(red) springs. That really helped with take off. I was gonna do the CDI swap with the KFX90 , but decided to replace parts that I know would work. I think the cheapest way for you KFX50/90 people to get more speed is to do a sprocket swap. You wont loose no low or high end torque(well you will, but nothing noticeable) because that little engine is dying to rock and roll!!!
Info: Stock variator weights: 8grams(ballpark figure) 6 total
carb: Keihin PTE16 , 85 MAIN JET. There is NO restricted parts on this carb. I removed and disassembled it. Also, dont bother buying a bigger carb , you will end up with the same results until they(mini quad gods) make a no rev CDI.
MAX RPM(KFX50): 8000RPM + OR - A COUPLE HUNDRED
Just some info I thought I would share. Also the Suzuki forum has some good info for their LTZ50. Yes they are having the same issues. Sorry to waste your time,hope you got something useful to use. Tim
Posted by: AIRMOBILE101
Sorry , one last thing. BOLT PATTERN: 4/110
Posted by: AIRMOBILE101
I would definitely go out and get some gears. I run my sons bike with a 17T front and a 28T rear sprocket. That really helped put!!!
Posted by: AIRMOBILE101
It should work. I added lighter clutch weights go give it better take offs. Go to Rebelgears.com for gears. Not the cheapest , but they will get you in the right direction.
Posted by: AIRMOBILE101
UPDATE!!!!!!!!
I think I might have a solution for the CDI box that limits the rev's. Im gonna need a few weeks for me to wire up a new harness and a different CDI box(secret box). Meantime , Im gonna head down to the local Kawaski dealer and do some comparisons. This should work for the KFX50 AND 90 if I figure this out. My original CDI has a white sticker on the side of it. "30400-PVA1-900 /2006. AUG" .
PLEASE!!!!!!! Somebody give my the number off of the KFX90 CDI box!!!! That way , i could at least eliminate one of two options!!!! The only reason Im doing this stuff is that my son wants to race , but Im not gonna set him up for failure with a bike that barely go's over 15MPH against bikes that do 20mph+
Posted by: tanga
could you send me the pics depicting where the speed reduction collar and how to remove it.
thanks,
Posted by: tanga
Thread,
you mention on step 2 the following:
2.) Get yourself an air impact gun, 17mm socket, remove bolt on front CVT pulley, remove the outer pulley, hold the inner pulley closest to the engine after removing the outer pulley so nothing will fall out
How do you keep the pulley from turning while you are trying to remove the nut in front of the CVT pulley? Your help is much appreciated.
Posted by: cliffymiracle
Hello,
Removing the restrictor collar is very easy. It requires an air impact gun to get the job done though.
1.) Remove CVT cover, plot out bolts on a piece of cardboard (the order of which you removed them), you'll need a c-ring spreader to remove the cover from the kick start (if you have one). Make sure you remove the bolt on the kick start so it can be removed from the shaft.
2.) Get yourself an air impact gun, 17mm socket, remove bolt on front CVT pulley, remove the outer pulley, hold the inner pulley closest to the engine after removing the outer pulley so nothing will fall out.
3.) Remove the ring that is on the sleeve (boss) between the CVT plates...and your done.
4.) Replace in reverse order...
Hope this helps, any questions feel free to ask...
Posted by: cliffymiracle
Pretty much the same but be aware that the 90 has three different types of restriction in the CVT, the only way to tell what you have is to remove the CVT cover.
1.) Restrictor boss or sleeve, it's grooved and located in the front pulleys. see 2nd link
2.) Restrictor ring or collar, located between the front pulleys. see 2nd link, the procedure is the same, just remove ring in between the pulleys.
3.) Restrictor ring or collar, located in the clutch pulley. see 1st link
First link: clutch = www.anythingatv.com/Technical/Reference/Kymco_ATV_Derestriction_Instructions.htm
Second link: restrictor boss in front pulleys = www.scootertherapy.com/bosspage.html
The KYMCO is the same as the Kaw since they designed and built it...
NOTE*** There may be a variation as to what color wire you cut noted in the link*** Perform any of these mods at your own risk***
Posted by: cliffymiracle
That's the problem with KYMCO manufacturing the 07 KAW and the Mongoose...there are too many variations as to what type of restriction you have. I've heard that there is also a variation as to which wire color controls the CDI restrictor. I should have mentioned this in my earlier post...
Posted by: cliffymiracle
With an impact wrench, all you have to do is hold the pulley itself (the impact wrench works with successive "hits" as it's turning). You can remove it with a regular wrench but you have to use a tool to hold the pulley.
With the Kawasaki, I'm not sure if the collar is in the CVT front or the rear clutch assembly.
Posted by: cliffymiracle
By the way, if you need a PDF of the CVT assembly, shoot me an email. It's the KYMCO 90 diagram but it is the same.
cliffymiracle@comcast.net
Posted by: cliffymiracle
See above post with links: copy and paste the links in your browser...
1.) Restrictor boss or sleeve, it's grooved and located in the front pulleys. see 2nd link
2.) Restrictor ring or collar, located between the front pulleys. see 2nd link, the procedure is the same, just remove ring in between the pulleys.
3.) Restrictor ring or collar, located in the clutch pulley. see 1st link
First link: clutch = www.anythingatv.com/Technical/Reference/Kymco_ATV_Derestriction_Instructions.htm
Second link: restrictor boss in front pulleys = www.scootertherapy.com/bosspage.html
The KYMCO is the same as the Kaw since they designed and built it...
NOTE*** There may be a variation as to what color wire you cut noted in the link*** Perform any of these mods at your own risk***
Posted by: cliffymiracle
The KYMCO 90 part number is 30400-LBD4-900 and the 50 is 30400-LLJ1-900 if that helps...they are different from each other according to the parts diagram.
Posted by: galligator
Hi,
Any chance you can post pictures from the service manual? Reading the directions and seeing the pictures would really help me out. Appreciate the help.
2007 Kawasaki KFX50
Posted by: galligator
Thanks for posting the links for the pictures, that really helped because now I have a general idea. By the looks of this it is different, but close. Mine has the goup of wires shown in the picture with a green wire, but I don?t see a ?loop?. And in this picture it shows the other end with a red wire going into it, where the finger is suppose to be pointing to green loop, but on mine it goes into another cdi plug altoghether. So I am not sure which wire to cut. If anyone reading has some suggestions, all are welcome.
2007 Kawasaki KFX50
Posted by: galligator
Appreciate all the help. Thanks to all, am planning on leaving the wires alone and going for the collar.
2007 Kawasaki KFX50
Posted by: poodle1973
I would like to know how to remove the speed reduction collar,and does this change the speed much? I have looked everywhere for the info with no luck, then I saw your post, hope you can help..Thanks
Posted by: Rhino 1
I read your response on 4/28/2007 regarding removing the restrictor collar on the KFX90. My granddaughter was at the race at Glen-Helen this week-end and didn't want to race because everyone was passing her. Do you know the color wire in the control box that connects to the revlimiter? Your help would be appreciated and my granddaughter will be happy also.
Posted by: Rhino 1
Thanks for your help, we got more top end now. What mods can we get for more speed? We put on a pipe and removed the reduction speed collar. Thanks Wally
Posted by: Rhino 1
Airmobile101 Thanks for the information on the sprocket. Will the 17T and 28T work the same on my kfx90 as it did your kfx50 or should I go to different gear?
