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I'm replacing both hoses on the gl1500. Should I just replace the thermostat at the same time since I'm assuming it's original? I never had an overheating problem in the 4 months I've owned bike but thinking now since I'm there may do the stat as well. I did order a new gasket for there to pop in. Just curious. Also is there an aftermarket one I can get instead of OEM. Thanks for any info
 

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Well if you are there to replace the gasket then I would replace the thermostat too.....if nothing else but for piece of mind knowing it is new.

I dug through some of my saved stuff and found this, hope it helps.

Thermostat & gasket

Note: One area that the 1500 owners have been stuck in returning to mother Honda for has been the thermostat & gasket and Honda charges a good premium for these. Here are some thermostats I found while searching for a replacement, keep in mind that a stock unit is 2.050” in diameter and that is also the size of the following thermostats. I have ordered the Carquest and Napa THM101 thermostats along with the Carquest rubber gasket for comparision, the only difference was the placement of the water valve opening in the thermostat and the gasket had more of a straight side than a rounded side, however they did fit in the 1500 with no problem. If in doubt be sure to check for proper size before installing and use your own judgment.

Carquest: 32438 --- 180 Degree F

Napa: ATM 1542904 --- 190 dg F,ATM 1542903 --- 180 dg F

THM 201 --- 192 – 195 dg F

THM 101 --- 180 dg F

THM 535090 --- 192-195 dg F (premium Weir design)

THM 535080 --- 180 dg F (premium Weir design)

The ATM & Weir premium Napa numbers are mostly available thru their on-line store.



Napa & AutoZone: Beck/Arnley brand thermostats (add BA in front of part # for NAPA)

143-0687 --- 160 dg F, 143-0688 --- 192 dg F, 143-0689 --- 180 dg F



Rubber thermostat gasket / seal

Carquest --- 30730

Napa --- THM 1091, ATMTG 2801, BA 0390019
 
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