Question about Motorcycles
Check ground wire that usually connects from battery to Starter bolt.
Or at least clean connections at battery terminals
Starters take a lot of Current to turn, bad connections at battery will allow many functions to appear fine but No Crank at teh Starter
Posted on Oct 26, 2012
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Posted on Jan 02, 2017
Is your fan kicking on when your bike starts to get hot?
On my cbr the fan would kick on at 215 degrees. Even sitting in traffic on a 90 degree day my bike would only get up to 220 at most.
If your fan is kicking on when its suppose to and you have your radiator filled up full then I would check your thermostat.
The thermostat is an object that opens up when your engine reaches a temperature of around 180 degrees and lets antifreeze run through your engine to keep it cool. If the thermostat isn't opening up then the antifreeze isn't circulating through your engine, its just sitting inside your radiator. And that's not what you want.
You can remove the thermostat from your bike and put it in a pan of water and heat the water up with a candy thermometer in the water and you should see your thermostat open up at around 180 degree's. Just do this on the stove. The water won't be boiling so you will be able to see it open up.
Hopefully its just your thermostat because they are very cheap(around 10 bucks).
If your thermostat is good and your fans kick on when they are suppose to then I would say its a water temp sensor or a sensor period.
I'll bet though that if you take your bike for a ride and when it gets around 215 degrees that your fan isn't kicking on to help the motor cool back down.
Hopefully this is the case and if it is you can just run the fan wires to your battery and hook up a toggle switch to turn your fans on whenever you please. This is just a bandaid fix and not fixing the real problem but it will get you by until you can fix it the right way.
Well I hope I may have been of some assistance and good luck,
Remember to check your fluid while the bike is running and warmed up completely, because if you just fill your radiator with the bike turned off it will only fill your radiator with fluid and not your motor as well(because the thermostat will be closed) which is what you want. Also after you fill your radiator when the bike is running and you can fill it any more let the bike run for a little while with the cap off to let any air in the cooling system purge out of the open radiator. You should see some air bubbles coming out of the radiator cap hole. If you have air in the system that will cause your bike to overheat as well. Had this happen on a Honda Car.
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Posted on Apr 05, 2009
Almost certainly a bad battery. Put a voltmeter on the battery and check it while trying to start the bike. If it drops to less than 10v the battery is dead.
Posted on Apr 16, 2009
SOURCE: battery not holding a charge,
Check the charging rate of your bike, see if its system is charging, if it does charge thn theres somewhere the battery is getting drained out.
In order to see if tht is happenning, switch off everything and thn remove one battery wire on the battery, after doing so try to fix it back and notice if theres any sparks when it comes to the contact of the battery terminal , if so thn theres a drain somewhere in the electricals and wiring.
Knight (Yamaha Seca XJ750A 1981)
Posted on Apr 17, 2009
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