Question about 1991 Honda CBR 250 RR
The fan is pluged in to wiring harness should not be a problem,the thermostat could be a problem when it kicks your fan in if at all if your bike is on the move continulasly it should not need the fan running unless the outside temprature is extreme,if you are doing stop start city riding then this can cause a lot of bikes to overheat,first test is to get the bike up to operating temp and without riding it and as the temprature is rising listen for when or if the fan starts if it doesnt then it could be your thermostat,if that is right it would pay to take it to the dealer and get them to check it out for you as too many times boiling is decreasing engine life by a lot . cheers hopes this helps
Posted on Oct 27, 2013
Testimonial: "Thanks man. This is great info. I am trying to learn as much as possible. I found out that my fan was indeed on backwards do to my bike having many owners before and that I live in Vietnam. It gets crazy hot here in the summer. also my radiator had a pin hole leak that was dripping on the headers. thats where the steam came from."
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Posted on Jan 02, 2017
Your honda shadow 500 over heats,because the oil cant room around the engine of the bike.the problem is the worn out destroyed oil seal .Check and replace the oil seal of your bike.
Posted on Jul 28, 2009
There seems to be an airlock in the system, as for the thermostate you can remove it check it out, fill in some water in a pan,insert the thermostate in it and heat up the water..you will see the thermostate ,if functioning start to open around 82 degrees centigrade or so.
Hope this helps!
Posted on Oct 27, 2009
Testimonial: "Thanks yeah it was an airlock removed the fuel tank and then pressure cap and pumped the tubes and air bubbled out once I started to fill more water"
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