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Old 03-20-2016, 12:55 PM
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Default 03 cr125 pink trans fluid

     

I have a 2003 cr125 that ive had for 9 months now. Cut to the chase? Ive changed the oil many times before and it goes in red comes out dark red. Usual. But after ripping track two days in a row wide open on the pipe i took off the fill cap on my trans and wiped the gear in there and it looks like a pink smoothie. Did some research but had i hard time finding stuff. To clear somr variables and possible questions: i didnt sink the bike in water but i did low side a couple times and high side once. Left side radiator has always had a slight bent on the outside but i dont know if that would affect it. Let me know if you guys want some pictures of the clutch area water pump radiator so on. Bike runs good. 42 hrs on piston 12 on new ring bearing and gaskets

---------- Post added at 01:55 PM ---------- Previous post was at 01:43 PM ----------

2003 cr125 transmission - Album on Imgur Here is the link to photos
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Old 03-20-2016, 01:26 PM
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Is the tattletale on the bottom of the waterpump dripping water at all? Make sure the tattle tale hole isn't plugged up. If it's plugged and your waterpump seal is leaking it could be getting in thru the oil seal. Def sounds like you are getting coolant in from somewhere.
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Old 03-21-2016, 07:22 AM
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a picture would help but probably like JMV said could be the water pump seal or in worst case scenario there is a porous on the clutch case, there is nowhere else for coolant to go through the transmission area on that engine. check your coolant level and see if it is OK, if you add coolant every ride then there is definitely a leak and first thing to look is your water pump seal.
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Old 03-22-2016, 09:12 PM
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I only need to do coolant on rebuilds it maintains great. I linked photos. And do you mean just the outside gasket on the pump or something else
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Old 03-23-2016, 04:29 AM
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you do well, coolant is the most neglected maintenance part from many users.



No15 is the water pump seal and No14 is the oil seal, we are talking about the No15 which should be replaced but you should remove the whole cover to check all the water pump components such as the water pump shaft No5 and bearing No13 for wear and or replace accordingly. the two gaskets No4 are only for the pump cover and have nothing to do with the transmission fluid.

is your crankcase breather tube still in place and in good condition? did you ride through enough water that could possibly go inside your transmission case through the breather tube?
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Old 03-23-2016, 06:19 AM
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Ok. Thanks for the explanation. If my coolant level is still high does that mean there isnt a leak? What im probably gonna do is flush the oil and if it happens again replace the seal and do what you said.
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Old 03-23-2016, 07:43 AM
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yes good thing to do now is to replace the transmission oil and after a good ride check if it got pink again but also check if the breather tube is still in place onto the crank case and avoid pressure washers (if you use any) onto the engine.

yes if the coolant level is unchanged through rides then there is no leak, also check the water pump check hole for any coolant leaks, looks something like this,





like JMV said, there are in some cases were the water pump seal covers that hole and coolant passes through the oil seal into the transmission instead of leaking out from there.
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Old 03-23-2016, 07:28 PM
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Do i need to replace my clutch plates after i fix the issue?
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Old 03-25-2016, 09:23 PM
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Pics

Ok guys, here is the update. After an hour or so dissasembling my crankcase cover i have reached the water pump shaft thingy. So i read a little about this and wear on that shaft caused by scoring can decreases the diameter of the shaft where the oil/water seal goes which caused my leak. Now i just have to order the bearing, the new pump gear, and some gaskets since i already have both new seals Here are some updated pictures. Tell me what you think.

Cr125 water pump gear wear - Album on Imgur
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Old 03-26-2016, 07:55 AM
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I think you found your problem !
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