SV Talk, Tuning & Tweaking Discussion and chat on all topics and technical stuff related to the SV650 and SV1000 Need Help: Try Searching before posting |
|
Thread Tools |
21-05-07, 01:35 PM | #1 |
Member
Mega Poster
Join Date: Jan 2005
Location: Barnet Herts
Posts: 5,070
|
Regulator/Rectifier?
Been having a bit of battery trouble for the last couple of weeks with the bike sluggish to start,and the lights getting brighter as I rev the engine.I expected it to be a shagged battery,as it is seven years old,but I dug out the multimeter and checked a few things anyway.And the winner is-------
Reading across battery terminals engine off and cold--13.3 V Reading across battery terminals at idle--15.5 V Reading across battery terminals at 5000 RPM lights on--19.8 V Battery noticeably warm after five minutes. Readings across alternator output wires all at around 85 V Now 19 volts isn't vastly higher than the 15 odd in the spec,but it suggests to me the regulator is up the spout rather than the old battery.I tried the same test with a spare battery from an R1 in the bike and still got 19 volts at 5000 rpm so anyone got a reg/rec for a curvy going spare?One that works please.
__________________
On a clear day we stand there and look further than the ordinary eye can see. |
21-05-07, 01:41 PM | #2 |
Guest
Posts: n/a
|
Re: Regulator/Rectifier?
Before getting "gung-ho" and replacing the reg/rect, make sure your generator is kicking out the required voltage too. Note that this will be AC naturally.
18-19v doesn't sound that wrong to me. Are you getting any specific things going wrong (like flat battery every so often)? Mines a K6, and my lights get brighter when I rev the bike. Quite noticably too at night. EDIT: Scratch what I wrote, you've tested the generator (alternator) output. 85V sounds a little low, but nothing major (I think I remember around 90V AC). Nothing there sounds really wrong to me. |
21-05-07, 01:58 PM | #3 |
Member
Mega Poster
Join Date: Jan 2005
Location: Barnet Herts
Posts: 5,070
|
Re: Regulator/Rectifier?
I'll do the same test on my son's SV when he's around and check that 19 V figure against what his puts out.I think it's too high,and the battery was quite warm after five minutes with the engine running.A sign of overcharging I thought?
__________________
On a clear day we stand there and look further than the ordinary eye can see. |
21-05-07, 02:02 PM | #4 |
Guest
Posts: n/a
|
Re: Regulator/Rectifier?
To my knolwedge, the output on the battery side of the reg/rect should be around 18v.
Limited knowledge though, but I think that's what I got. I'll try searching for my old post that has the voltages for almost everything under the sun on my K6. EDIT: how typical is that... it's now 404'd after the move to the new software on the org. Last edited by Baph; 21-05-07 at 02:08 PM. |
21-05-07, 04:35 PM | #5 |
Guest
Posts: n/a
|
Re: Regulator/Rectifier?
19Volts sounds way too high, you also run the risk of popping lamps etc because of the higher voltage. (Remember there supposed to be 12V items with a certain degree of tolerance. 19 Volts is is asking for a 58% tolerance). Meter reading really shouldn't be more than 15Vdc, maybe 16 if your meter's a bit wonky.
It does sound like the regulator, and no I don't have one! Good Luck! |
21-05-07, 04:49 PM | #6 |
Member
Mega Poster
Join Date: Jan 2005
Location: Barnet Herts
Posts: 5,070
|
Re: Regulator/Rectifier?
That's what I thought.I checked the output on a ZX9R and it was about 14 V at 5000 RPM.
Doing a search,it seems you can fit a Honda reg/rec but you have to rewire it a bit.Anyone know what this entails and would a Blackbird one do the trick?
__________________
On a clear day we stand there and look further than the ordinary eye can see. |
21-05-07, 04:51 PM | #7 |
Guest
Posts: n/a
|
Re: Regulator/Rectifier?
Sorry mate, a bit too specific for my knowledge!!!
|
21-05-07, 05:00 PM | #8 |
No, I don't lend tools.
Mega Poster
Join Date: Jul 2003
Location: Skunk Works, Nth London
Posts: 8,680
|
Re: Regulator/Rectifier?
19V! Way, way too much, as said above, any more than 15V on an averagely accurate meter is too high. It's unlikely to pop bulbs, but it will boil your battery - which is likely goosed by the gross overcharging it's been receiving.
Search my posts on charging system checks - plenty of them here. Blackbird reg/rec will be fine, some wiring tweaks will be needed with reg/recs from most other bikes, but they're simple changes.
__________________
If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst" |
21-05-07, 07:04 PM | #9 |
Guest
Posts: n/a
|
Re: Regulator/Rectifier?
Blew up an NC30 battery at 17.5......
mmmm Sulphur |
21-05-07, 07:36 PM | #10 | |
Guest
Posts: n/a
|
Re: Regulator/Rectifier?
Quote:
I really can't remember what I got when playing with a DMM on my bike, and my original post (now lost forever - must get around to playing again) probably reflected the comments of others in this thread. Sid, I was wondering what reg/rect's would fit, but didn't like to comment as it's a curvy. I know a couple that fit pointies, but again, need minor tweaks. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
regulator rectifier K5 | Pam | SV Talk, Tuning & Tweaking | 2 | 07-02-09 08:43 PM |
I need a Rectifier / Regulator. | Marv | Stuff Wanted | 3 | 19-08-08 12:43 PM |
Regulator-rectifier | beaniebikerbabe | SV Talk, Tuning & Tweaking | 15 | 27-05-08 12:33 PM |
Rectifier/regulator | Gordon B | Stuff Wanted | 12 | 02-01-08 11:00 PM |
K2 regulator/rectifier, new in box | northwind | For Sale - SV's and SV related items | 0 | 22-02-07 09:14 PM |