| Author | Message | ||
     Justin4612 |
helping a buddy with his 1999 m2 but i see the xb board is the most active. My buddy bought a new battery about 3 months ago but has let his bike sit since then, which is really sad. Anyways we can put a start pack on it and it will start and idle great but as soon as you take off the jump pack it starts to idle rough and backfire like it is not getting enough power to burn all of the fuel. It will continue to run just not great which brings up my question. If his charging system was messed up would the bike cont. to run or just die. I think he just bought a bad battery. I also don't think he gave the battery a good charge when he first bought it. He got one of the cheap one that you have add the acid after you buy it. I have it on a trickle charger but it does not seem to be holding a charge. I have not tested to output on the battery with a volt meter but i am at work and wanted to see if anyone has had a similar problem and could give me a hand. Also i have a 2003 xb9s and love it. Thanks for any help. | ||
| Lucas70374 |
I would check the rotor and stator, That is what charges the battery. On my brothers S1 the front primary sprocket nut which holds the rotor and sprocket on came loose causing the battery not to charge. Bad news for us the nut messed up the threads on the sprocket shaft causing us to replace that. About a $2000 job. Hope you dont have that problem, but there is a test just refer to the service manual to check that. | ||
| Justin4612 |
thanks I will check that out. | ||
| Reepicheep |
The running you are describing is exactly related to your charging problem.... I reproduced it on my M2. I can't remember if it was with a bad stator and the battery removed, or with a good stator and the battery removed. Regardless, it is just the electrical problem you are chasing. Start with the stator resistance test, that is the easiest to perform. Measure pin to pin, and pin to ground. After that, jump the bike from a good battery, let it run, and tell us what the AC (not DC) voltage coming out of the stator is. With those numbers, we can pretty much tell you for sure if your stator is toast. And don't rule out simultaneous failures. More then one of us had a simultaneous bad battery, stator, and possibly voltage regulator. | ||
| Justin4612 |
thanks for the help. another quick question on the m2 is there any easier way to get that battery out besides the wrestling match it looks like it going to be. Just in case the battery is shot. | ||
| Reepicheep |
It was not a big deal on my 2000 M2, I don't recall if the 1999 was different. | ||
| Justin4612 |
Just got home and looked at the bike. I do not have a shop manual for it since it is not my bike. I load tested the battery and it was shot so i replaced it. Put a good charge on the battery and put it in. The battery alone has a charge of 13.2 volts dc. When the bike is running it show 14.2 so i assume that the charging system is working but you know what happens when you assume. Does the extra volt when running sound like it is charging. Thanks for the help. | ||
| Fullpower |
yes 14.2 is charging. if the head lamp is ON, AND the engine is running, 14.2 volts is just right, the charging system can be called functional. | ||
| Justin4612 |
Fullpower, Thanks for the help. That is good to hear. My buddy will be happy that is was only the battery. |
