Howdy from SE, NM.
Been following these super helpful threads since buying my ‘07 1300PA last year. Much respect. Little bit of trepidation being my first post. Been a particular enjoyment to watch seasoned men school fools…respectfully y’all can be pretty salty. Makes me smile (and laugh sometimes) at said “schooling” & look forward to your input.
For the record: Understand significant overheating issues have already been addressed over the decades on this forum and I hate to ask something already answered, but for whatever reason, thread links on Google haven’t been working in the past month or 2 (there’s a site error every time I try and pull them up!!?). This evening, I tried the site search engine, to no avail. In the past, I was able to access a lot of information here on this particular topic (thank you, Igofar & several others)… Perhaps someone can send a link, or copy/paste relevant previous answers???
Thanks.
My Issue:
Temp gauge reaches max/flashing anytime after riding about 10 minutes between 20-60mph.
Idling = temp @ 3 bars.
65mph+ = temp @ 5 bars
Intop and go traffic (in town), temp stays between 3-5 bars.
Notes: No leaks from square or round holes. Don’t seem to loose fluid while riding, but there could be a tiny seep up in the V, as I’ve not personally removed throttle-body to carefully inspect each connection. Coolant reserve tank will eventually “overfill”, but this takes a good half hour of riding (sharing for whatever it’s worth. At one point, I wondered if the bike was actually overheating, or if something was wrong with the temp sensor). Believe coolant flow is “ present” - strong coolant movement visible from removed radiator cap, when blipping the throttle, after warming engine (about three minutes of idle). FYI: A little bit of crystallization was visible and removed off the inside of thermostat cover.
Repairs/Troubleshooting so far:
- OEM Thermostat replacement
- OEM Radiator cap replacement
- Trimmed cracked/air-leaking overflow hose end (connected to radiator cap side)
- Flushed, soaked (vinegar & water), & tested radiator with water
- Purchased and installed used radiator (in case old one was clogged/ruined) - this seemed to help, but very little
- Drained coolant (including removing 10mm bolt on engine) and replaced with HP Honda Pro Type 2 (blue coolant) - this also seemed to help, but again, little
Not including here how many times the cooling system was drained, checking the initial old thermostat (looked at some of Igofar’s old t-stat pics for reference), replaced and tested parts, replaced and tested parts…
I know the ST is a great reliable bike, but this one problem is beyond me, and kicken my chicken.
Thanks.
Euell
Been following these super helpful threads since buying my ‘07 1300PA last year. Much respect. Little bit of trepidation being my first post. Been a particular enjoyment to watch seasoned men school fools…respectfully y’all can be pretty salty. Makes me smile (and laugh sometimes) at said “schooling” & look forward to your input.
For the record: Understand significant overheating issues have already been addressed over the decades on this forum and I hate to ask something already answered, but for whatever reason, thread links on Google haven’t been working in the past month or 2 (there’s a site error every time I try and pull them up!!?). This evening, I tried the site search engine, to no avail. In the past, I was able to access a lot of information here on this particular topic (thank you, Igofar & several others)… Perhaps someone can send a link, or copy/paste relevant previous answers???
Thanks.
My Issue:
Temp gauge reaches max/flashing anytime after riding about 10 minutes between 20-60mph.
Idling = temp @ 3 bars.
65mph+ = temp @ 5 bars
Intop and go traffic (in town), temp stays between 3-5 bars.
Notes: No leaks from square or round holes. Don’t seem to loose fluid while riding, but there could be a tiny seep up in the V, as I’ve not personally removed throttle-body to carefully inspect each connection. Coolant reserve tank will eventually “overfill”, but this takes a good half hour of riding (sharing for whatever it’s worth. At one point, I wondered if the bike was actually overheating, or if something was wrong with the temp sensor). Believe coolant flow is “ present” - strong coolant movement visible from removed radiator cap, when blipping the throttle, after warming engine (about three minutes of idle). FYI: A little bit of crystallization was visible and removed off the inside of thermostat cover.
Repairs/Troubleshooting so far:
- OEM Thermostat replacement
- OEM Radiator cap replacement
- Trimmed cracked/air-leaking overflow hose end (connected to radiator cap side)
- Flushed, soaked (vinegar & water), & tested radiator with water
- Purchased and installed used radiator (in case old one was clogged/ruined) - this seemed to help, but very little
- Drained coolant (including removing 10mm bolt on engine) and replaced with HP Honda Pro Type 2 (blue coolant) - this also seemed to help, but again, little
Not including here how many times the cooling system was drained, checking the initial old thermostat (looked at some of Igofar’s old t-stat pics for reference), replaced and tested parts, replaced and tested parts…
I know the ST is a great reliable bike, but this one problem is beyond me, and kicken my chicken.
Thanks.
Euell
