Join Date: Feb 2014
Location: New Hampshire
Thanked 18 Times in 17 Posts
Well today my battery died. After 17500 miles and 7 years. The first problem I noticed was when I put the battery back in at the start of this year. When I started the bike it seemed to crank fine but it would run a little rough for a few seconds. I also noticed that the FI light was on then too. But it would shut off and the bike would be fine.
So today I decided to investigate the problem. The first thing I checked was the battery voltage. With the key off it sat at 12.5V. Which is the same as my dads CB300F, luckily his bike is here so I could use it to compare. With the key on the voltage would drop to about 11.5V. This was exactly what my dads bike did so for now I didnt think it was it. I then measured the voltage under cranking and saw a low of 8V on both bikes but just for a second. My bike would still to the weird stumble but the voltage seemed to be inline with the 300F's. During idle the voltage would sit at 14.1 which is right where it should be.
The next thing I tried was just charging it again. On a 2A charge rate it only took about 10 minutes before it was full. I put it back in my bike and crank it over. This time it starts perfectly. No stumbling and the FI light stayed off. So now I think it could have just been a little low. But just to make sure I have one more test.
Im am going to switch the battery out of my dads bike. I disassemble my dads first and take it out. Just to see I try starting my bike before I take the battery out again. This time it stumbles and the FI light was on. Now im certain it is the battery but Im still going to try it in my dads bike just to be extra sure. I get my battery out and put it in my dads bike. I start it and it shows the exact problem by 250 was doing. So now I know its the battery. I turn the bike off and try to start it again but this time it is really struggling to turn the motor over and the dash it flickering on and off. This battery is now really dead.
I am replacing it with a Shorai LFX14L2-BS12 because I would like to shed some weight if I can. Hopefully this battery lasts me as long as the first. I am also glad it didnt fully die while I was out somewhere.
2012 CBR250R Black
Racetech springs and emulators, Yamaha R6 shock, Yoshi Rearset Risers, Babyface GP Shift adapter, EBC HH Sintered Front and Rear Brake Pads, CBR600RR pegs, Mirror delete with CBR600RR block offs, Ebay Bar-end mirror, Red LED dash, The2Wheels levers, Homemade Fender Eliminator, LED Blinkers, Tank pads and grips, CBR300R seat, Spider Peak red Grips, Vortex Clip ons, DFC, Delkevic 14' Slip on, Spiegler Braided Front Brake Line,Black Rims
Soon to be mods: