88 cr125 rad flush with what?

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8/26/2018 6:41 PM

Got this bike free. Thought, hoped for a quick top end fix and flip. Water pump and radiators seem to have this gunk everywhere. What caused this and what should be used to clean it up?
-thanks men.

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8/26/2018 8:03 PM

looks like what happens when you mix two different types of coolants... Best way to get it out of the radiators is have them dipped (might be easier to find a descent set of used ones or aftermarket ones)... as for the bike, I guess you could try flushing the system... but it’s probably trapped in the coolant ports of the head and cylinder as well... the correct way would be to disassemble the cooling system / top end and hand clean it... Id also pressure check the system too once it’s all cleaned...

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8/27/2018 9:03 AM

I think that’s what happens with engine ice and water or they could have used a radiator stop leak.

As said above it’s more then just the rads, is the head, pump, ect. Try flushing with hose and see what you can do.

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8/27/2018 9:20 AM

Eh dont worry about it. Just run it

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8/27/2018 10:36 AM

I would start by rinsing with a garden hose at low pressure then 100% disassemble top end and cases and thorally clean 100% of it out of every possible crevice. If there is any left it could clog, overheat and blow the motor.

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8/27/2018 6:23 PM

Yah, top end is off. Hoping someone had a DIY trick to flush this crud. I may go have it dipped like mentioned above.

Take a look at this piston. It went kicking and screaming!!

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8/27/2018 6:27 PM

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8/27/2018 9:26 PM

White vinegar is an effective cooling system cleaner, though I've only used it when the engine is capable of running. Make sure to thoroughly flush it out afterwards.

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8/28/2018 4:57 AM
Edited Date/Time: 8/28/2018 10:20 AM

Could be a combination of poor cooling maintanence and corroding mag cases?

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8/28/2018 8:48 AM

sandman768 wrote:

Could be a combination of poor cooling maintanence and corroding mag cases?

If I remember right 1986 was the last year they fitted one piece magnesium clutch covers. They are two piece aluminium covers on the '88.

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