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(continued report from post of Blazinbye of August 20th)
Changed the radiator cap to the previously mentioned Stant and that didn't make any difference... On a 200 mile ride to the Wisconsin Dells last weekend in 80+ temperatures the bike acted pretty much the same...
One of the strange things that is happening here is that with repeated excursions into the mid range or higher, the temp gauge never quite goes as far down (cooler) as the previous time... There seems to be an ever increasing engine temperature during these heat/cool down cycles with the average engine temperature climbing ever so slightly each time a heating/cooling cycle occurs... Once engine heat builds to this point and after I arrive home and pull the bike into the garage, the fans will never shut off... I can usually get one cycle of the fans if I start the bike from a cold state... After that, the fans will come on a second time and never shut down...
When I get a bit of time I'm going to pull the cooling system down again and do a through inspection of all parts involved... If I can see into the radiators that may tell me if there is a buildup in them... If I can find a shop to do it, I might just have them rodded out and see if there is any difference in performance...
Another part I am not sure of is what Honda describes as the "thermovalve"... It looks like it's in the carb heating circuit but I have no idea what it actually does or if it could effect overall cooling...
Les
(continued report from post of Blazinbye of August 20th)
Changed the radiator cap to the previously mentioned Stant and that didn't make any difference... On a 200 mile ride to the Wisconsin Dells last weekend in 80+ temperatures the bike acted pretty much the same...
One of the strange things that is happening here is that with repeated excursions into the mid range or higher, the temp gauge never quite goes as far down (cooler) as the previous time... There seems to be an ever increasing engine temperature during these heat/cool down cycles with the average engine temperature climbing ever so slightly each time a heating/cooling cycle occurs... Once engine heat builds to this point and after I arrive home and pull the bike into the garage, the fans will never shut off... I can usually get one cycle of the fans if I start the bike from a cold state... After that, the fans will come on a second time and never shut down...
When I get a bit of time I'm going to pull the cooling system down again and do a through inspection of all parts involved... If I can see into the radiators that may tell me if there is a buildup in them... If I can find a shop to do it, I might just have them rodded out and see if there is any difference in performance...
Another part I am not sure of is what Honda describes as the "thermovalve"... It looks like it's in the carb heating circuit but I have no idea what it actually does or if it could effect overall cooling...
Les