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Discussion Starter #1
Hi it appears this part is no longer avaialble under the many different part numbers, as I am replacing the thermostat and piped and I have a leak at the Carb heat Exchanger I was going to replace this part while the bike is stripped down however I have been unable to find a part , so can anyone advise if mine fails when tested can it be bypassed by a hose ?

19330-MT8-004 VALVE, THERMOSTAT - ALL '90
19330-MW5-004 VALVE, THERMO - ALL'91
19330-MY4-004 VALVE, THERMO - ALL'91
19330-MN5-004 88-89
19330-MZ3-621 88-89
 

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If you are referencing part # 6, yep no longer available from Honda.

https://www.partzilla.com/catalog/honda/motorcycle/1988/gl1500-a-gold-wing/water-pipe

The correct (updated) part number for your 1988 is 19330-MZ3-621.

1988 - 1989: 19330 MZ3-621 and 19330-MN5-004

1990: 19330-MY4-004 and 19330-MT8-004

1991: 19330-MY4-004 and 19330-MW5-004

1992 - 1993: 19330-MY4-004

1994 - 2000: 19330-MZ3-621

Don't know of anyone who has bypasses this valve....!

If you need to get a used part, you know what years are compatible.
 

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Hallo pricedjohn

Welcome on this nice forum. Wish you al the best.
And good luck with your Wing.
 
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