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only one i'd reccommend is the honda one,other ones i tried had failures after a short time

there is a few auto ones that might possibly work if you could find a adapter bushing from 18.5 t0 16.5mm x 1.5
1987 Aspencade 129K
1986 SEI 93K
2014 Tri-Glide HD 17K

#16 06-20-2011, 04:44 PM,
Found this item:

A lot cheaper then Honda price.
#17 06-20-2011, 04:55 PM,
Replaced my OEM thermostat which was jammed open with a cheap Honda Accord aftermarket one. Just found a post on another site saying this:-
" I was tempted to get a cheaper thermostat but noticed that ST's have a thermostat with special properties that cause it to be more expensive ($18 vs. $7). When it fails, it has a central plunger with a temperature fused link. It can only fail in the open position. If the engine temp gets too hot, this fused link breaks, it releases the extra strong central spring which forces the valve open permanently. Your engine may become less efficient but your bike will make it home for repairs. I had an early Civic that failed closed, and you just have to park it. Maybe it's changed. But make sure that whatever thermostat you select, that it has that extra plunger in it."

If this is true it sounds worth fitting the proper item or the engine could be damaged with a failure?
The lady walking ahead of me sped up so I did too, she began running so I ran too, she screamed so I screamed as well. I never even saw what we were running from.
#18 02-05-2012, 08:51 AM,
always take a broad look at the design of any non-factory replacement part.
my fuel pump went out - it was replaced with a used one with low miles on it, not an automotive 'I can get it to work' replacement
thermostat - factory Honda Motorsports
head gaskets (and related cooling gaskets) - Honda Motorsports
oil filter - Wix
brake pads - EBC

remember - the GL1200's are a BBF (big, bike, female) and that's a whole lotta dead weight to man-push.

-Ride On ~O)
enjoying the view from the saddle....... due mainly to the people and information found within this site
#19 02-13-2012, 11:59 AM,
My opinion is if you have to spend a lot of time and remove too much to get to it, pay the piper and get a part you know is right. Even if it is the Honda part. Use a cheap replacement and you might be paying the same as the OEM after you have to replace it again.
CE1 Navy Seabees/RET
1981 to 2002
ASE Mechanic
#20 02-13-2012, 12:16 PM,

- ~O)
enjoying the view from the saddle....... due mainly to the people and information found within this site
#21 02-13-2012, 12:18 PM,

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