brokenbike Posted March 23, 2008 Share Posted March 23, 2008 I have a yahmaha yzf-r1 that keeps overheating, the cooling fan doesn't come in till the temperature hits 109oC I have changed the thermostat so it can't be that and I'm lost I just don't want to spend a fortune on all new parts that are pointless if they don'e solve the problem Can anyone help??? Link to comment Share on other sites More sharing options...
Openroad Posted March 23, 2008 Share Posted March 23, 2008 I have a yahmaha yzf-r1 that keeps overheating, the cooling fan doesn't come in till the temperature hits 109oC I have changed the thermostat so it can't be that and I'm lost I just don't want to spend a fortune on all new parts that are pointless if they don'e solve the problem Can anyone help??? Hi brokenbike, I'd try flushing and cleaning the cooling system with fresh water, also check the radiator cooling fins are not externally blocked with old leafs and dirt. you could try washing the radiator with a pressure hose from the back, that will blow any rubbish out the front. Dont forget to use antifreeze mix in system Link to comment Share on other sites More sharing options...
billa65t Posted March 24, 2008 Share Posted March 24, 2008 I have a yahmaha yzf-r1 that keeps overheating, the cooling fan doesn't come in till the temperature hits 109oC I have changed the thermostat so it can't be that and I'm lost I just don't want to spend a fortune on all new parts that are pointless if they don'e solve the problem Can anyone help??? Hi mate , the first thing i would check would be the temperatue sensor that makes the fan cut in! the thermostat only regulates at what temp the water starts circulating its the temp sensor that regulates when the fan cuts in, if it is covered in crap or faulty then it wont work properly ! Hope this cools you down? Link to comment Share on other sites More sharing options...
Moderator drewpy Posted March 24, 2008 Moderator Share Posted March 24, 2008 I thought the new bikes run really hot anyway and this is normal? Link to comment Share on other sites More sharing options...
Moderator Airhead Posted March 24, 2008 Moderator Share Posted March 24, 2008 I have a yahmaha yzf-r1 that keeps overheating, the cooling fan doesn't come in till the temperature hits 109oC I have changed the thermostat so it can't be that and I'm lost I just don't want to spend a fortune on all new parts that are pointless if they don'e solve the problem Can anyone help??? What temperature should the fan come in are you sure that 109C is too high, any other R1 owners out there? Link to comment Share on other sites More sharing options...
jimmythehat Posted March 25, 2008 Share Posted March 25, 2008 hi, is bike pissing coolant out?? if not seems like you dont have real problem, the temp guage is never 100% accurate. most bikes fans wont cut in until 102 - 106 degrees , so you may not have a fault, is the bike running ok? do the fans cool the temp down??does your bike have one or two fans ? is one not working?also is your water / anti freeze mix approx 50/50, water boils at 100 . the anti freeze slows that down so wont boil til higher temp. Link to comment Share on other sites More sharing options...
brokenbike Posted March 26, 2008 Author Share Posted March 26, 2008 hi, is bike pissing coolant out?? if not seems like you dont have real problem, the temp guage is never 100% accurate. most bikes fans wont cut in until 102 - 106 degrees , so you may not have a fault, is the bike running ok? do the fans cool the temp down??does your bike have one or two fans ? is one not working?also is your water / anti freeze mix approx 50/50, water boils at 100 . the anti freeze slows that down so wont boil til higher temp. the coolant does not come out i have one fan that comes in at 109 it does cool it down and it has the right mix in Link to comment Share on other sites More sharing options...
flash1259 Posted March 26, 2008 Share Posted March 26, 2008 just a thought. is the engine painted? Link to comment Share on other sites More sharing options...
Dave C Posted March 26, 2008 Share Posted March 26, 2008 What is the condition of the radiator and has the system been flushed. If the rad is in poor condition it could be restricting flow which will cause the temp to rise. Link to comment Share on other sites More sharing options...
brokenbike Posted March 27, 2008 Author Share Posted March 27, 2008 Hi mate , the first thing i would check would be the temperatue sensor that makes the fan cut in! the thermostat only regulates at what temp the water starts circulating its the temp sensor that regulates when the fan cuts in, if it is covered in crap or faulty then it wont work properly ! Hope this cools you down? i have just changed the switch and now the fan comes in at 104 Link to comment Share on other sites More sharing options...
brokenbike Posted March 27, 2008 Author Share Posted March 27, 2008 What is the condition of the radiator and has the system been flushed. If the rad is in poor condition it could be restricting flow which will cause the temp to rise. i have just changed the fan switch and the fan comes in at 104 thats for your info Link to comment Share on other sites More sharing options...
brokenbike Posted March 27, 2008 Author Share Posted March 27, 2008 the coolant does not come out i have one fan that comes in at 109 it does cool it down and it has the right mix in i have just change the fan switch and the fan comes in at 104 Link to comment Share on other sites More sharing options...
brokenbike Posted March 27, 2008 Author Share Posted March 27, 2008 the coolant does not come out i have one fan that comes in at 109 it does cool it down and it has the right mix in i have changed the fan switch and it come in at 104 Link to comment Share on other sites More sharing options...
brokenbike Posted March 27, 2008 Author Share Posted March 27, 2008 I have a yahmaha yzf-r1 that keeps overheating, the cooling fan doesn't come in till the temperature hits 109oC I have changed the thermostat so it can't be that and I'm lost I just don't want to spend a fortune on all new parts that are pointless if they don'e solve the problem Can anyone help??? i have now put a fan switch and it comes in at 104 and power washed the rad and that helped can tell the diff in the temp thanks for your help and info Link to comment Share on other sites More sharing options...
Recommended Posts