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n00bie



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 Post subject: Coolant not getting to radiator
PostPosted: Thu Aug 03, 2017 4:59 am 
Have an 07' ruckus 4500 miles on her. Got the carb cleaned and upgraded to a polini variator/belt/dr pulley 5g sliders. Pinned it the other day with no cdi around 45mph. I was super stoked to have it running like it is and then it started to over heat and go into limp mode. the first time it happened I looked and the overflow tank was empty. I got it back to the house and filled the radiator and the overflow, let it idle for 5 min and hit the throttle to bleed the system and try to get any air out per other posts I've read here. The next time I rode the same thing happened. This time the overflow tank was showing a little fluid missing but when I opened up the rad it was almost empty. I have noticed a few drops of coolant on the garage floor on the left side of the scoot when facing the tail. I looked up under and it's coming from somewhere in the middle of the underside of the scoot under the carb, but me and my local scooter guy can't figure out where it is originating from. Haven't seen any leaks lately and the same thing happened again. Again I opened the radiator and it was empty and the overflow tank showed loss of fluid. I filled up both and bled the system. I can't figure out why the radiator isn't getting fluid and why it's draining from the overflow. Please help!


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n00bie



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 Post subject: Re: Coolant not getting to radiator
PostPosted: Mon Aug 07, 2017 9:05 pm 
Hello, this is my first post and I'm fairly new to Ruckus's, but....

If you are losing lots of coolant, but not really have any pools on the ground that are the similar volume of fluid, then it could be getting in to your engine through a leaky head gasket.

viewtopic.php?f=37&t=106063

I do hope I am wrong and that it is an easier fix. Someone please correct me if I am wrong.


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Junior Mint
Junior Mint

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 Post subject: Re: Coolant not getting to radiator
PostPosted: Thu Aug 31, 2017 7:37 am 
Will is spot on. Its common for it to get into the engine via head gasket, but more common via the hard silver pipe behind the radiator. It's very easy for that pipe to not seat properly and slowly leak coolant either into the engine, or just into that stator/flywheel cavity to then leak out. It's also pretty common for the rivets on the radiator to break and starting that same leak as mentioned.
When bleeding, I also squeeze the coolant lines several times, to get any trapped air out. But check your oil and see if it's milky.


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48hours of Ruckus Winner
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 Post subject: Re: Coolant not getting to radiator
PostPosted: Fri Sep 01, 2017 5:54 pm 
yes the rivets have broken on my radiator and overheated my engine before... just put some screws in there instead and it held it in place

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Shot Caller
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 Post subject: Re: Coolant not getting to radiator
PostPosted: Fri Sep 01, 2017 7:10 pm 
Don't be afraid to take the ruck apart and see what's going on.

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Ride Game Participant
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 Post subject: Re: Coolant not getting to radiator
PostPosted: Sat Sep 02, 2017 8:07 am 
There are two coolant lines to go to the carb. Check those and a the few other coolant lines on the engine. Personally I'd hose it all off, air hose it dry and take 20min or so to let it idle and check for a leak.

From my experience it's pretty unlikely that headgasket is an issue. Being that it's low mileage and a decade old, I'd suspect a dried up seal somewhere or build up deposits at the edge of a fitting that's allowing coolant to seep by

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