Page 1 of 1
Help!
Posted: Mon Apr 29, 2013 5:10 pm
by bwake
Brought a new battery, put it on the bike, after a week it had gone flat
Charged it back up, after using the bike all last week, come to go on it today and battery was completely dead! I have reason to believe, it could be the rectifier what do you think?:? (Its not very far to work, about three mile trip)
Posted: Mon Apr 29, 2013 6:14 pm
by Luders
where did you get the battery from and why do you think it's the the rectifier?
Posted: Mon Apr 29, 2013 6:40 pm
by bwake
brought a new battery begining of the season(gel type),it went dead thought it was a duff one so got another old style acid filled one 2weeks ago.same thing has happened to that.doesn't seem to be charging of the bike hence the rectifier/regulator query.
Posted: Mon Apr 29, 2013 11:51 pm
by JanBros
only one way to find out : measure the voltage with the engine running.
but be careful when revving it : the CDI doesn't need much to fry if the regulator passes a too high voltage
Posted: Tue Apr 30, 2013 12:17 am
by dave32
Stator charging coils gone duff,may need re winding,need to check the Ohms resistance as per the manual.
Posted: Tue Apr 30, 2013 6:57 pm
by bwake
had a spare rectifier in the parts bin,checked the resistance on this one compared to the other one and it gave different readings,so charged the battery back up swaped them around and i'll keep an eye on the voltage.(here's hoping)
Posted: Wed May 01, 2013 4:49 pm
by bwake
Used it today, battery fully charged when I went out, got home , and the battery had dropped to 10 volts
what shall i do now?
(could be 2 dodgy rectifiers but not convinced)
Posted: Wed May 01, 2013 8:10 pm
by Garry
With my limted electrical knowledge
it sounds as though it is a fault with the charging or a bad battery
You don't have a race loom do you - i think the charging side is sometimes
removed - but the racers will no doubt be able advise further
Posted: Wed May 01, 2013 8:27 pm
by bwake
i've tried 2 different batteries so kinda ruled them out,over the past couple of hours it's gone from 13v to 12v just sat there,is that normal
.it's all standard wiring .
Posted: Wed May 01, 2013 8:36 pm
by Garry
I guess it should dropt to 12V - if it doesn't hold a charge overnight and you
have tried 2 it seems like it is discharging somehow - do you have an alarm
fitted?
Whenever i have had a problem with the voltage dropping it has always been
because the battery is knackd
Posted: Wed May 01, 2013 8:45 pm
by bwake
no alarm fitted,i suppose it would make sence for it to drop to 12v
i'll test it again in the morning .
Posted: Wed May 01, 2013 10:02 pm
by JanBros
you have to measure the voltage over the battery when the engine is running, only way to know what is happening.
if the voltage drops when riding, 99% the battery isn't charged.
Posted: Thu May 02, 2013 9:57 am
by ScottaKR
dave32 wrote:Stator charging coils gone duff,may need re winding,need to check the Ohms resistance as per the manual.
+1
And as JanBros said, you really need to measure the voltage when it's running.
Also, when the rec/reg fails, it normally over-charges rather than the other way round, so I somewhat doubt the issues there.
Posted: Thu May 02, 2013 10:36 am
by Luders
ScottaKR wrote:dave32 wrote:Stator charging coils gone duff,may need re winding,need to check the Ohms resistance as per the manual.
+1
And as JanBros said, you really need to measure the voltage when it's running.
Also, when the rec/reg fails, it normally over-charges rather than the other way round, so I somewhat doubt the issues there.
+2 When this happens it usually kills your tacho first then your CDI shortly after.