draining coolant from a YY250T By barry (Read 2,283 times)

[barry]

I want to change the coolant in my YY250T but can't find the drain plug. HELP....

[bobf]

I have a yy250t with a vertical CF Moto Honda clone. I believe the water drain is the bottom bolt on the water pump. Slow drain and probably not complete at all. Also you could disconnect a low level hose. Or remove the water pump. Also might want to remove the thermostat to allow free flow when flushing. Then when done flushing put it all back together and start adding coolant, 50% mix aluminum friendly. Burp the pipes while filling. Then add some to the reservoir tank. Run engine to hot and let cool. Check water level when cold and add more if needed. Run to hot again and let cool once more.

If your engine is a horizontal one, I have no idea.
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[barry]

Thanks bobf, Sounds like we have the same bike. The bottom bolt on the water pump. OK, where's the water pump what does it look like and how do I get to it.....??

[damin69]

Apr 12, 2012 19:20:35 GMT -6 barry said:

Thanks bobf, Sounds like we have the same bike. The bottom bolt on the water pump. OK, where's the water pump what does it look like and how do I get to it.....??

This is what the water pump looks like. it has the hose hooked to it.

[barry]

Thanks you guys again. How do you burp the pipes and how do I add more to the reservoir tank.? Is that big hose the lower inlet hose..?

[bobf]

What I did on my machine. There are some larger hoses just in front of the engine. I filled the radiator then grabbed those hoses and squeezed them, over and over, till the air was pushed out. Then I added more coolant and repeated the burping. More fill more burping, etc. The over flow tank on my machine was under the floor cover beside the gas tank. Open the trap door over the gas tank and the coolant reservoir and fill the bottle to about half full.

Now go into the heat and cool cycles. After the cool try the burping and filling before restarting the engine for another hot to cool cycle.

Don't put any plastics on until you are sure you have the coolant system working properly. Not overheating, temp gauge works, fan comes on.

Look here: JR is talking about the horizontal engine here, but i am sure the instructions are good on the vertical engine as well.

thescooterprofessor.proboards.com/index.cgi?action=display&board=cool&thread=24&page=1

I hope this all helps and that your build is just the same as mine.
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