battery is going flat all the time.

[graemeclark]

Hello eveyone, Can any one help me me please, i got a 99/00 sv about a week ago, since i have had it the battery has gone flat 3 times, I have gad the relays checked told there ok iv changed the bulbs back to the factory bulbs, I charged the battery and rode it to boxhill and back from aldershot when i got back the battery was that flat it would not start the bike This happens after every ride out, Can any one help PLEASE as i know very little about the bike. Graeme:confused:

[shifter]

sounds like the good old Regulator/rectifier to me. Do a search there is plenty of info on here about them as they are prone to fail.

[Alpinestarhero]

Sounds very much like the reg/rec to me aswell - there is a post by sid squid on this forum (you may have to do a search) about how to check if the reg/rec is blown using a multimeter attached to your battery!

Don't dispair or get too worried - Its a common fault with SV's - mine blew at about 25,000 miles. I got a new one from suzuki which looked like a differant design, so hopefully better heat dissipation (which, as far as I understand, is a major reason why the reg/rec fails). In 8000 miles, I've had no problems. I use my bike every day almost :D

To find the regulator/rectifier, you need to take the seat unit plastics off and it'll be on the right hand side (as you sit on the bike) or, if you prefer, the side that the sidestand isnt on :D

Matt

[thefallenangel]

i'm going to produce a printout of results.

My bike is about to hit 8k.

Can someone tell me what revs you have to rev the bike to test the Rec/Reg so i can predict when mine is going to give up the ghost.

If i test it every 1k then i should be able to predict it going and thus saving a battery?

[graemeclark]

Many thanks for your help shifter and alpinestarhero will change that and hopefully will be ok.

[thefallenangel]

Many thanks for your help shifter and alpinestarhero will change that and hopefully will be ok.

Battery could well be gone too as well as the reg/rec so could be a mix of the two

[shifter]

Output should be 15.5v @ 5000rpm for a carb model, not sure on the FI ones though.
Don't think you'll see it coming though, they just stop working and that's yer lot.

[Dangerous Dave]

Aye sounds like the Reg/Rec, I must be the only person that still has had no problems and the originals fitted to both my '99 and '00 SV's.

[thefallenangel]

Output should be 15.5v @ 5000rpm for a carb model, not sure on the FI ones though.
Don't think you'll see it coming though, they just stop working and that's yer lot.


I take it they breakdown due to excessive heat. So surely it would be a gradual breakdown. It wouldn't be a case of the voltage staying the same and then it dropping off, surely you should see it happening over time.