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Tempature way too high.
Hey guys. Some of you may know that I just finished rebuilding my 90' 750. So far everything is going well. Except today I just took a 1 1/2 hour drive up to my dads house, this was a mistake because I know my bike gets too hot when im in stop and go traffic or on longer trips.
So basically at the halfway point of the drive, the bike was running pretty warm. About 80% the way through the white zone. It was about 5 o'clock so the traffic was pretty bad in my area. At this point im almost bordering the red zone.
By the time I got to his house, the coolant reserve is boiling out the cap and im on the border of white and red on the thermometer.
And thats where my problem is, I cant figure out why its getting so hot? The fan kicks on like it should at about the halfway point, but its to no use because it still gets way too hot if I let it run long enough. I replaced the thermostat and backflushed the radiator several times.
But I feel like the radiator is the issue, previous owner ran Dex-cool (death cool) so the first time I backflushed the radiator I had orange rocks comming out. But now when I back flush it nothing comes out except the water, which is clear. Maybe the dex cool clogged some of the rad pipes? Im thinking about letting the radiator soak overnight in that radiator flush stuff. What do you guys think?
So basically at the halfway point of the drive, the bike was running pretty warm. About 80% the way through the white zone. It was about 5 o'clock so the traffic was pretty bad in my area. At this point im almost bordering the red zone.
By the time I got to his house, the coolant reserve is boiling out the cap and im on the border of white and red on the thermometer.
And thats where my problem is, I cant figure out why its getting so hot? The fan kicks on like it should at about the halfway point, but its to no use because it still gets way too hot if I let it run long enough. I replaced the thermostat and backflushed the radiator several times.
But I feel like the radiator is the issue, previous owner ran Dex-cool (death cool) so the first time I backflushed the radiator I had orange rocks comming out. But now when I back flush it nothing comes out except the water, which is clear. Maybe the dex cool clogged some of the rad pipes? Im thinking about letting the radiator soak overnight in that radiator flush stuff. What do you guys think?
Hayden
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did you bleed the system?
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Yes bled the system several times using the black nipple on top of the thermostat
Hayden
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If the bikes running too lean them maybe it will overheat? How do the plugs look.
"Show me a man who makes no mistakes, and I'll show you a man who doesn't do things." Theodore Roosevelt."

2007 Victory Kingpin
Current projects - 1986 VN750 & 1988 EL250

If you had deathcool rocks coming out, it could be some of the cores are still plugged. I'm not sure if flush chemicals can remove the hard red clogs, but it's worth a try.
2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf
Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
It might pay to check the radiator with an IR temp gun to see what the temp actually is. Check all over the radiator to see if the temp is consistent or has hot/cold spots. That would help determine if there's a partial clog.
2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf
Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
After flushing the radiator, everything seems normal now. Doesnt overheat even when i let it sit still at idle. Good enough for me!
Hayden
Good to know, sounds like the flush chems do eat red death rocks after all.
What did you use for this last flush?
What did you use for this last flush?
2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf
Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
Right I shouldve gone into more detail. Iv flushed the radiator several times with just water to no avail. But this time i spent 5 bucks on 2 bottles of that prestone radiator flush and flushed it with 50% of the flush stuff and 50% water. Then after that I put a tad bit of dish soap in there and water (got real foamy) and backflushed it with that solution. Ever since, my temp never goes higher than the center.
Hayden
Quote:
Originally Posted by Spockster
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It might pay to check the radiator with an IR temp gun to see what the temp actually is. Check all over the radiator to see if the temp is consistent or has hot/cold spots. That would help determine if there's a partial clog.
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