After regular riding for some reason my bike died on the street no power. My Alternator seems to not produce the same power it did. Off voltage is 12.45 on is still 12.45 doesn't get higher until 5krpm. a month ago it was 14volt on and 12 off. and would remain 14 volt the whole time throughout the rpm range. This all happened after a oil change any ideas?

 

6V battery requires 7V charge
12V battery requires 14V charge
24V battery requires 28V charge and so on.

12.45V charge on a 12V battery isn't going to cut it. At idle, the alternator should probably produce about 12.5V, but should shoot up immediately to 14v at the slightest addition of power.

Your stator sounds l.ike my ex girlfriend: she's not putting out enough. Get it checked out...

 

... no ideas? because i am stumped. This whole bike has just been an electrical mess

 

a low output on your stator could cause 'an electrical mess'. I would take it into the shop. If you rev it up to 5k and she's still putting out 12.45 volta, that is not normal. Honestly, I don't think it'll be too pricy of a fix... a new stator costs about $150... but it could be the something more simple than that... a regulator/rectifier or something. Shop would know what to do.

 

i'll check the rectifier could be the culprit thanks!

 

I say check your regulator/rectifier. The quick way to check it is to rev your engine and look for a fluctuation in the headlight. It should fluctuate. Or measure the voltage between the connector terminals.

 

From another website:

The magneto (which is pretty much the same as an alternator or a stator)is always trying to put out the same amount of power, this creates a problem when the battery is fully charged, or there is no heavy load on the system. A lot l.ike a tap filling a pail of water, if something is drawing water from the pail at the same rate it is entering it will not over flow. But if the water keeps coming in with none being taken out, it will over fill, - thus the battery over charges.
The regulator rectifier prevents this by taking the excess voltage and and converting it to heat to keep the system with acceptable limits.

The regulator rectifier prevents this by taking the excess voltage and and converting it to heat to keep the system with acceptable limits.

For the system to work properly, the ground on the bike MUST be good. If the ground is poor the charge that would normally be going into the battery, now goes into the rectifier and possibly other electrical components connected into the system. This of course can cause failure of these components.

For this reason it is imperative that all grounds be checked for corrosion. This can be caused by copper wire connected to a frame, two dissimilar metals will act on each other, add rain, battery acid, vibration and you have copper sulfate w.hich is that blue powder you find on your battery terminals.

 

Damn Forum! Keep on deleting my posts!
Okay I have HIDS they have a built in voltage regulator and capacitor so they don't fluctuate, kinda sucks. I wiggled the Rectifier wires seemed solid. But there was a voltage change

 

Okay, Now the sitting voltage is around 12.9 and when it is slightly reved goes to 13 then to 14. However i remember before my idle voltage was 14. maybe this is because my idle is 1k now for some reason after i seafoamed my bike. I may have to readjust idle. I will check those grounds hopefully thats the problem