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  1. #1
    Redonthehead (OP)
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    Talking Over heating problem

    Hi guys and gals.Newbie here I picked up an 06 FZ6 for a steal (now I know why) it over heats and bad. I need help. Heres the skinny, previous owner PO dropped the bike avoiding a car scrapped up the right side but not all that bad bent the fairing stay left side broke loose from bracket now hangs down Im gonna try to straighten it out if not ill need a new one. other than that it all works rides great just funky looking front fairing. Ok back to the over heating, the bars on the temp guage go to max at speeds above 50 or so but if i keep it under that it will go to 4 bars. Here is what I have done so far. Changed oil and filter, new thermostat (yamaha couldnt have made that any harder to change), new radiator cap and coolant. yes all of the air is out of the system, fan turns on at 4 bars on guage can hear it and feel it lol burnt the ****e out of me hand testing it lol so fan works. I can see fluid circulating when i pop the cap off in the radiator. so not thinking water pump is the issue but this is my first yamaha Im a CBR guy sorry. anyhoo I plan to fix this bike then sell but WONT pass this problem off to someone else like was done to me. any help would be appreciated.

  2. #2
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Over heating problem

    Is the thermostat OEM or a knock off?

    Short of the fan locking up (from a pebble kicked up), the cooling system is pretty stout.

    I would check ALL the hose clamps for tightness (they DO loosen with the many heat cycles) and can prevent the system from fully pressurizing. With the engine hot, the larger hoses should be hard from the pressure, are yours?

    I gather you checked under the WP itself looking for leaks. Inspecting VERY CLOSELY where ever a rubber hose attaches to a fitting is imperative. A small leak can evaporate very quickly and never hit the ground. Also, check that there's no coolant in the oil...

    If nothing found, scroung up a pressure gauge and check the system after hooking up and pressurizing the radiator..


    Have to ask, are you certain the thermostat is installed in the correct direction?


    BTW, you won't be able to straighten the "stay". That's also very stout un-less "it's dropped". I'm on #2 or 3, lost count..
    Last edited by TownsendsFJR1300; 09-24-2018 at 02:03 PM.
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

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  4. #3
    Redonthehead (OP)
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    Re: Over heating problem

    Thank you very much for the reply, The thermostat is OEM Yamaha and is in correctly with the little hole facing up (I do have to thank yamaha the thermostat cover makes it where the thermostat can only be installed one way just have to make sure hole is facing up) and the radiator cap is OEM Yamaha as well. Since posting I have removed and fully flushed the radiator and oil cooler, There is no oil in the water or water in the oil.I will go check all of the hoses later as the radiator flushing helped a little bit but not a cure as a precaution I ordered a new water pump impeller shaft new mech seal and both orings reason being is if this was a car this is a water pump issue itself, most likely, as the fan turns on when it should promptly at 4 bars on the guage what ever temp that is i dont know as this bike is digital tach. I did notice that the PO used only water so the hoses kinda crunched a bit when squeezed so ill look at replacing them all soon. I was able to bend the stay back close (thank you 20 ton shop press and two pieces on steel) but fairing is still kinda off but way better than b4, it was a stout mofo as you said so ordered that new as well 105$. I have not found any leaks just yet but will look very closely today. Here's a newbie question do Yamaha's just run hot, I live in sunny dry hot AZ and still 100 degrees everyday til late OCT b4 90's and 80's come to save us. Am I throwing $ at a problem that cant be fixed due to ambient temps of nature combined with internal combustion engine heat? ill update when new parts are in should be this week. Im hoping I dont have to take the bike apart and sell it piece by piece.

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  6. #4
    Vrrroooooom! Over heating problem Motogiro's Avatar
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    Re: Over heating problem

    We had a member who had his bike at a shop when he had a blown engine. It was a Daytona 675 triple. He had it at a shop and they wanted too much money to get the bike running again. He bought a used engine and asked for help installing it. We did the install and it ran well except there were times it was overheating as he rode the bike for a few weeks.

    Turned out that when another mechanic had the bike, oil was spilled on the radiator. As he road the bike the oil gathered more and more dirt from the air and left very little air passage through the radiator vanes. Check to see you have adequate air flow through your radiator vanes. The FZ6 is known for it's great cooling. Sometimes it's simple as airflow...

    We cleaned his radiator vanes of the grime and oil and it ran cool again...
    Last edited by Motogiro; 09-30-2018 at 11:43 AM.
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

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  8. #5
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Over heating problem

    Those hoses should be hard when at temp even with just water.

    Gentlemans bet you have a hose or two not fully tight.

    I'm in SW Florida, with LOTS of humidity and low 90's regularly. I think my fan came on maybe twice in 7 years.
    My S2 shows the actual temp (not bars) and normally stays around 178F. Stop and go traffic, almost ALWAYS UNDER 200F.

    Point being, the cooling system is NOT a weak point in the bike. You still have an issue somewhere, just got to find it.

    The new pump won't hurt(I still have the original pump, thermostat, etc with 26k miles)..
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

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  10. #6
    Vrrroooooom! Over heating problem Motogiro's Avatar
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    Re: Over heating problem

    Hit the back of that radiator with a water nozzle and make sure it's clear of debris.
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

  11. #7
    2 Da Street, Knobs R Gone FinalImpact's Avatar
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    Re: Over heating problem

    Define overheating....
    Boiling over into the Reservoir, or dumping reservoir contents once full is a sure sign. But that can be air in there or a bad seal of one of the 3 areas at the radiator cap.

    That said a light on or high reading could be corrosion of a contact or a bad sensor.

    Does it ping, detonate, or knock when allegedly overheating?

    If you have an IR heat gun or a contact probe you can shove in the radiator or outlet hose (exterior) and its greater than 235F, that's cutting it pretty close if not at full pressure.

    Do share the exact signs if something more than a light and fan on...
    08 Raven w/a few mods...
    R6 Forks, R1 Rear Shock (revalved), 6 Ignition Advance, S1 CAT free Header, SS Mid-Pipe, 2Bro Exhaust, AIS block off plates, Bazzaz Z-Fi Fuel Controller & Z-AFM Data Logger, Air Box mod, CR10E Plugs, 48-Tooth Rear Sprocket, FZ1 Bars, Spider Grips, Adj levers, Powder Coated -Triple, Bars & Rear Sets, Solid mounted rear-sets w/knurled pegs, Dual Headlight, Tail Tidy, LED Combo Brake & Directionals, LED POD lights & Tinted PUIG Wind Screen!

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  13. #8
    Redonthehead (OP)
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    Re: Over heating problem

    I have tried to reply twice, this is the third time, it seems my replies are too long in the typing and I get timed out when I click the reply button then I have to re log in and then my replies dont show.
    Last edited by Redonthehead; 10-03-2018 at 05:43 PM.

  14. #9
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Over heating problem

    Odd, but just type shorter responses.


    BTW, both FI and Motogiro are moderators and can address that issue...
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

  15. #10
    Vrrroooooom! Over heating problem Motogiro's Avatar
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    Re: Over heating problem

    Quote Originally Posted by Redonthehead View Post
    I have tried to reply twice, this is the third time, it seems my replies are too long in the typing and I get timed out when I click the reply button then I have to re log in and then my replies dont show.
    I've also had timeouts. I believe it's a problem with our hosting server. It seems to be intermittent.

    Sent from Moto's Motorola
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

  16. Thanks TownsendsFJR1300 thanked for this post
 

 
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