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Discussion Starter · #1 ·
it happens most time an starting bug me so I aways warm up my quad. it would die on me and wont crank over some time dose it after I ride. I keep trying crank it still wont start I use choke still wont crank over wen warm up. an I killed my damn battery trying start it. today once year race 20miles this fck pissed me off. any one know what could be?

sorry typo use my phone
 

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flipp your kill switch back and forth and turn your key switch on off on off then try we some time have that happen and that usually works
 

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When you change out the battery it may solve all your problems. Yamaha battery is like $135, but you can get a suitable sub at O'Reillys, AutoZone, etc for like $45. It will not be a maintenance free sealed battery, you will have to add the acid yourself.
 

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The battery could be bad, it may not hold a charge after it has ran a while. Th easiest way to check the charging system is to check the battery with a voltmeter, then check it again when it is running.

Battery = 12.5VDC
Running = 13.5 - 14.5VDC

If the charging system is working then you may have a dead cell.
 

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any you know were all grounds are. might have clean it
You have a ground from the battery negative going to the starter, the starter is the ground, because the mount is bolted to the engine case. I would almost put money on it that it is you battery. I had a very similar problem. My Raptor 250 initially started great, then it would struggle to start, then it would crank but not start, then it wouldn't even crank. I put it on the charger and it would start again, but eventually it would dwindle back down to nothing. I tested the battery initially and it had like 9 volts, then I charged it and it had 12.5, and when it was running it showed 13.5. I knew the charging system was good, so the battery was obviously bad. My Raptor 250 was an 08 model, meaning it was manufactured in 07, so the battery was actually 4 years old in 2011. I put in a new battery and everything was fine. It had 13 volts static, and 14 volts running. It never hesitated to start and never got weak again.
 

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If you are running a stock oem batt. You should get a new one anyway. It's past it's life expectancy of a stock batt. Always a good idea to have a good batt when trying to deal with electric gremlins. Your grounds are on the starter and coil.
 
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