Replacing 2000 ST1100 Water Hoses - Questions

Joined
Dec 30, 2022
Messages
47
Age
60
Location
Boston
Bike
2000 ST1100
Hi All,

Just finished the BOS to FL trip. In PA started a coolant leak right at the port to the expansion tank hose, from the radiator. Cut it, put it back on and went on my way knowing I had more work to do. While I was in there, I noticed coolant coming off the threads/liner of the right-side coolant hose coming from the thermostat, so I would imagine that I need to replace, and tightening the clamp won't solve it ;) ...but to finish the ride, I did tighten. So not looking forward to pulling everything and changing hoses. More than that I have a few questions:

1) At this point are OEM hoses from Partzilla even good, or would they be dry rotted? ...I do have two OEM, in package, right-side hoses from the previous owner.
2) Is there a non-OEM expansion hose I can get? specs?
3) I'm thinking that if I do this, may as well replace: the 3 hoses (two engine, one expansion), Carb boots, thermostat. Anything else?
4) Any tips, or articles about the process are welcome.

as always, thanks in advance!!

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I recently installed braided silicon hoses, and they fitted perfectly:


Rest, like internal bypass tube, also with braided silicon line.

I'd also replace the radiator cap, likely the gasket on yours is already cracked...
 
Don't know about Partzilla but the Honda hoses I got from RonAyers were fine.
But I like Martin's deal with the silicone hoses a bit better!
You also need to check the water 'necks' under the carbs while you are in there.
Sometimes they will corrode and can cause seepage.
Not too difficult if you have the place to work and don't get in a hurry. ;)
 
When I changed my hoses years ago I recall that the OEM hoses took a lot of force to push onto the neck before tightening the clamp. I was used to hoses that slipped on fairly easily, and then secured with the clamp. The Honda hoses were much more tight fitting than others I had replaced over the years, and the job took longer than I expected because they didn't just slide right on, they took a lot of twisting and turning (and swearing). The short hose between the radiator and T-stat housing was especially tough to get seated.

I am curious if the silicone hoses are easier to install than the OEM hoses.
 
When I changed my hoses years ago I recall that the OEM hoses took a lot of force to push onto the neck before tightening the clamp. I was used to hoses that slipped on fairly easily, and then secured with the clamp. The Honda hoses were much more tight fitting than others I had replaced over the years, and the job took longer than I expected because they didn't just slide right on, they took a lot of twisting and turning (and swearing). The short hose between the radiator and T-stat housing was especially tough to get seated.

I am curious if the silicone hoses are easier to install than the OEM hoses.
I just replaced most of the hoses on an st1100 with oem. They were so tight that I wound up using some assembly lube.
 
I recently installed braided silicon hoses, and they fitted perfectly:


Rest, like internal bypass tube, also with braided silicon line.

I'd also replace the radiator cap, likely the gasket on yours is already cracked...
English language link? I didn't see a 'translate'.
 
English language link? I didn't see a 'translate'.
Just enter the item number [323895674735] or the description [Honda ST1100 Silicone Radiator Coolant Hose Kit] into your search field...

Martin - Were the silicone hoses easier to install than the OEMs (just curious)?
Inner diameter where a perfect, snug fit, a tad more wall thickness but the clamps still fitted nicely...
 
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