KX Riders
Maintenance & Technical => KX250 / KX125 => Topic started by: queen of spodes on April 16, 2014, 11:02:29 PM
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I was stripping the cylinder to send it off to Millennium but sadly discovered that the right power valve doesn't turn and won't budge. Looks like the top part of it was broken off at some point likely due to the same reason. Also, the valve on the front of the cylinder is stuck as well.
I have some Kroil soaking in the right powervalve and sprayed a little around the front valve. My feeling is that neither of these valves are coming out easily.
What's the procedure for removing locked up power valves? At what point do I break out a dremel?
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One other thing, what other cylinders could I potentially use for this bike? I'm not seeing any 89 cylinders on FleaBay and haven't in the last few months.
My question is will other year models (like the 90/91 or even the 88) actually fit and still work OK with an 89 bottom end? The 88 bottom end I have looks nearly identical to the 89 bottom end where the cylinder attaches (same water ports, ect).
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I would not resort to the dremel just yet.
Can you post a pic of the offending exhaust valve?
The 89 KX125 cylinder and part number are unique (1565 FITS 89 KX125 11005-1565) but I bet someone here knows what else will fit...
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white spirit or gunk slowly remove the carbon build up 1st ,surprised its not the l/h kip seems to be common that,i need a left kip for next build like :lol:
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I got the valves moving, but I need to replace the right valve as the top post is broken off from it being stuck previously. Do you have to take out the center valve in order to remove the side valves?
Will valves from a KDX200 fit the KX125?
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So there are different part numbers for the 89 KDX200 and KX125 power valves and components. Thought I might get lucky there, more of that on Ebay.
I need the right side powervalve if anyone has one let me know.
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I don't have any but, you might want to run 3 different searches on eBay
1989 kx125 exhaust valve
1989 kx125 power valve
1989 kx125 powervalve
Spelling is everything.
Once you run one of the searchers look for the words "Follow this search" in green, about 2" down from the top of the page directly in the middle.
Click on "Follow this search"
Then eBay will automatically email that search result once a day anytime that search result is listed on eBay.
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ya have to take out the guvoner rod to get the valves out,check for ware on the cogs 8-)
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Do you mean the rod that lays across the top of the exhaust port, with gears on it? It only comes out so far.. then stops.
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Pull the main exhaust valve (one below your exhaust port) out of cylinder until the groove in the valve lines up with the edge of the cylinder.
Lift the small idler gear out of its hole.
Then lift both the right and left valves until their gear surfaces are flush with top of cylinder.
Then your operating rod will slide out. :-D
I use oven cleaner on stuck valves. I broke one once, so I have become much more patient when they get stuck.
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The power valves are specific to the 1989 kx 125 model.
1988,1989,1990 all have different part numbers for the valves, so you can't switch them out for a different year.
The part number for the 1989 right hand valve is 12005-1113.
You could cross reference this # to find out if they were used on the KDX maybe.
Sometimes you better off trying to find someone on ebay selling an old cylinder/core with the valves still inside, rather than trying to wait for a set to come up by themselves.
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agreed ther all different ,never tried oven cleaner but will in futre I usualy use thinners or white spirit just the same as gunk takes it off nice n clean valves n ports makes all the difference gives it some rattle but apparently they all do this :lol:
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Power valves disassembled.
Note, fwiw.. right valve came that way. P.O. also welded the countershaft sprocket on, among many other "fixes". This bike was past roached. I am foolish for trying to restore it!!!
Anyway- no oven cleaner or heat needed. I let the cylinder soak in diesel for a week. The valves were spinning free, but I couldn't pull the center bushing & valve assembly out. So a week soaking in diesel, followed by some generous application of Kroil it finally pulled out.
Everything but the right side valve looked serviceable, but I ordered some replacement valves (right center and left) and will probably install those. Rod looks good.
(http://i.imgur.com/I2laYaA.jpg)
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Striking out on the right side exhaust valve (part number 12005-1114). Many OEM fiche sites say they have it, but actually don't after I place an order for it.
Found one on ebay that ended/sold March 16, 2014 just a month ago. Wish I'd known!
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Power valves disassembled.
Note, fwiw.. right valve came that way. P.O. also welded the countershaft sprocket on, among many other "fixes". This bike was past roached. I am foolish for trying to restore it!!!
Anyway- no oven cleaner or heat needed. I let the cylinder soak in diesel for a week. The valves were spinning free, but I couldn't pull the center bushing & valve assembly out. So a week soaking in diesel, followed by some generous application of Kroil it finally pulled out.
Everything but the right side valve looked serviceable, but I ordered some replacement valves (right center and left) and will probably install those. Rod looks good.
(http://i.imgur.com/I2laYaA.jpg)
Mmmm Mexican coke
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It's all in the sugar :lol:
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I think I've emailed every seller of 89 KX125 used parts on Ebay asking if they happen to have power valves. No Kaw dealer has one listed in stock (had a couple dealers check the dealer network tool).
Can this bike be run without a powervalve or how bad will it work if I put the broken one back in? Feeling pretty disheartened about this project. More so that I missed an auction for a NOS right side powervalve on Ebay last month.
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I know that you emailed me at least twice :-D
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:mrgreen: ahah. sorry!
So have you heard of anyone having a powervalve machined?
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Hey, try this link for that power valve.
http://www.kawasakipartsnation.com/oemparts/a/kaw/50a64a9df870020a00f536b6/cylinder-head-cylinder
I has able to add it to the cart....didn't say unavailable or anything. Maybe they have it?????
This one says it's available too..part #12005-1114
http://www.speedsupplies.com/partslisting.asp?position=467&category=KW
Search for that part number and see what you get....
dinky
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Hey, try this link for that power valve.
http://www.kawasakipartsnation.com/oemparts/a/kaw/50a64a9df870020a00f536b6/cylinder-head-cylinder
I has able to add it to the cart....didn't say unavailable or anything. Maybe they have it?????
This one says it's available too..part #12005-1114
http://www.speedsupplies.com/partslisting.asp?position=467&category=KW
Search for that part number and see what you get....
dinky
Already called Kawasakipartsnation.. they don't have it.. like most sites that list it as available.. they have old/stale/outdated information but let people order the part anyway... then you wait 1-2 weeks to get the money refunded.
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I'd check nosparts.se
They are out of Sweden and deal in nos kawasaki parts.
I've used them many times in the past for 80's kx's with great luck.
Guys name is Bjorn, send him and email with your part#.
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Checked with them yesterday... no dice, they don't have it.
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I good machine shop should be able to replicate your old one. I would get a few sets made so you have spares.
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I good machine shop should be able to replicate your old one. I would get a few sets made so you have spares.
Talked to a large machine/gear fab shop in town today. $1200 for ONE valve. If I ordered 10+ it would be $400 each.
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Also, ordered a 1989-1994 KDX200 RH EXHAUST VALVE (12005-1122, http://www.partzilla.com/parts/detail/kawasaki/KP-12005-1122.html). Came in today. I compared it to my 1989 KX125 NOS LH EXHAUST VALVE (12005-1113, http://www.partzilla.com/parts/detail/kawasaki/KP-12005-1113.html ) to check length ect.
No dice.
(http://i.imgur.com/UXFPFaN.jpg)
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Bummer man...
Are you set up to get emails from ebay any time a exhaust valve for your bike shows up?
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Yeah. I scour the used parts too... found one a few weeks ago someone threw in a box of bolts.. it had the gear end showing. Wrote to ask him to pull it out and check the pin.. broken off. Kicking myself for not knowing I needed this d**n thing just a couple months ago. One was on Ebay and sold for a little over 30 bucks, NOS too.
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Would a 90-91 jug bolt on to the 89 bottom end? If so I have more options.
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I have a 89' jug on my 90' bottom end if that helps you. I went thru the same deal you are a month ago. I ended up buying the whole cylinder with valves off ebay for $50! I was excited to say the least except it was sold to me as a 90' and showed up a 89' but it worked for me.
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Trying to find out what model valve this came from. The 89 is very very similar, but a little larger. The valve opening (diagonal slot) is also a little wider on the 89 valve.
unknown valve -- maybe 87?
(http://i.imgur.com/SJnzs8m.jpg)
89 valve - note the difference in valve opening width
(http://i.imgur.com/7zYKVUQ.jpg)
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i have one valve out of 87 only have right side the cutouts are different from left to right also Ill dig it up and compare with ur pic
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can u check those measurments total lenth must be more than 6mm :|
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sorry those are the 250 ones i have a set of 85 125 valves here i can check sizes gears are same size
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Total length was 60 mm
(http://i1289.photobucket.com/albums/b501/ben_brown5/2014-07-22134254_zpsce10ddf4.jpg)
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So what did you end up doing?
I have basically the same problem. Restored 1989 kx 125 and then found out power valve is broken. Mine is the LH one 12005-1113
just keep buying scrap heads until I find one with a good LH valve?
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burn I had mine repaired by a guy on VitalMX (thread (http://www.vitalmx.com/forums/Old-School-Moto,22/Custom-machining-an-obsolete-NLA-power-valve,1270119)). That's my plan A in case I can't find a NOS right hand exhaust valve. I may have a LH exhaust valve I could sell ya once I know I won't need it.
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I actually found brand new nos LH VALVE. Hopefully thats really all I need. Thanks.
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I had exactly the same problem with my 99 250,LHS valve was broken and KIPS was solid....absolute pain in the ass to find a second hand one...dont give up they are out there just be patient.
The symptoms of this not working on my bike-it was like riding a 4stroke.
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Usps lost the one I first purchased. Place I got it said they would get me another. I informed them it was discontinued and they said it wasn't and got me another. Brand new kawi genuine
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So I finally got my replacement LH valve. Brand new from Kawi. Went to install it and found the RH one is also not salvageable. So I am in search of one. Going to ask the place I got the LH one if they can get me a RH. Why would Kawi disc the RH and not the LH?
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So I finally got my replacement LH valve. Brand new from Kawi. Went to install it and found the RH one is also not salvageable. So I am in search of one. Going to ask the place I got the LH one if they can get me a RH. Why would Kawi disc the RH and not the LH?
They probably cast the same number of LH and RH valves, but the right side valve tends to freeze up more with no/little maintenance. Just a guess. I've heard of a couple people talk about starting to create replacement valves for these old machines. Earlier in this thread someone got a reproduction LH valve off a KMX200 from a company in England. I wrote that company and they said they are buying used valves when they see them, but they are right now just sitting on them - which sucks for people like us who have bikes to restore.
Someone else in the KX500 forum also said they were getting some CNC equipment and would be possibly recreating some of the older KX5 valves. If that is successful maybe they will branch out.
Those can't be the only people thinking about this. With 3D printing now a "thing", how much longer before steel/AL objects can be 3D printed, and the cost should be a fraction of what it would take to have one made with CNC equipment.
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Total length was 60 mm
(http://i1289.photobucket.com/albums/b501/ben_brown5/2014-07-22134254_zpsce10ddf4.jpg)
Looks like I bought a 1985 RH(?) valve. NOS, maybe I can sell it back to someone who needs it.
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So getting down to the bottom of it..
12005-1113 LH is still available straight from Kawasaki(old stock)
12005-1114 is disco with no remaining.
I ordered another LH and will machine the slot out to since that is the only different. Wont have a mark to line them up but can do it by sight. Just like what the other guy did with the KDX valve I guess
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Look what showed up in the mail today: :D
(http://i.imgur.com/XHYDN1e.jpg)