Yamaha FZR battery troubles...

Zeeky · Two Stroke Sniffer Joined: 30 Mar 2009 Karma :

hi, i just recently my battery ran out COMPLETELY (it was a pretty old battery)...
when it didnt start i thought it was because i hadnt used it for about a month... so i roll started it a couple of times...
after a roll start, while riding on the road, it died... and there was burnt plastic smell...

i replaced the battery and also the plastic connector thing to the rectifier (which had melted)...
and now its working fine!!!
i read somewhere in another forum to check your battery often.
i got a multimeter and checked the voltage.
when the bike's off it approx 12.5V but when i turn it on.. revs up to around 3000.. it goes all the way to 16 - 17V ...
should that be happening???
i dont want to have the battery die on me again...

ps. ive been riding for less than a year... Very Happy

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WoooHooooooooo!!!!!!!

Cigaro · World Chat Champion Joined: 28 Mar 2007 Karma :

IIRC normal level should be 13-14 volts, sounds like your regulator or rectifier may be knackered.

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Sounds like it is the regulator part of the regulator / rectifier that has gone (not that you can replace them seperatly on most bikes).

Don't think they are expensive for FZRs (~£50 from https://www.electrexworld.co.uk/ for an FZR600).

the high voltage (which probably went far higher at speed) probably melted the connector and wrecked the battery. It also stands a fair change of wrecking the cdi unit or any other electronic unit (eg, control unit for heated grips) so don't ride it until fixed.

All the best

Keith
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SimonB · Brolly Dolly Joined: 23 Sep 2005 Karma :

The regulator rectifier went on my FZR600 when I had it. I've read that its quite a common fault.

I was able to replace it with one from a Yamaha R6 from a guide on-line. The R6 regulator rectifier cost about £10 from ebay and its deemed to be better than the FZR as it has a larger heat sink.

I'll have a look for the link later, I think it was from FZR Archives.
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Bikes: Honda CBR250RR [sold], Yamaha FZR600 [sold], Honda CBR600RR6

SimonB · Brolly Dolly Joined: 23 Sep 2005 Karma :

Hmm didn't take long, heres the link I was on about:

https://fzronline.com/wiki/doku.php?id=r6_voltage_regulator_conversion
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Bikes: Honda CBR250RR [sold], Yamaha FZR600 [sold], Honda CBR600RR6

Finglonga · World Chat Champion Joined: 27 Jul 2004 Karma :

Do not use the bike until you fix it as you will boil the battery and need a new one.
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Andy Sez....
F.Y.Y.F.F.

Zeeky · Two Stroke Sniffer Joined: 30 Mar 2009 Karma :

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Zeeky · Two Stroke Sniffer Joined: 30 Mar 2009 Karma :

Sorry.. but again i was just wondering if i could use a R/R from any bike.. different makes as well...
eg. Suzuki GSXR 600 ... its got 4 pins too..
so id only have to drill the plate to stick it on!!!

Would the electrical side of things be the same!??
im thinking it would be... But then again.. im not 100% sure...

Thanks!!!!!!!
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WoooHooooooooo!!!!!!!

Zeeky · Two Stroke Sniffer Joined: 30 Mar 2009 Karma :

sorry i meant... 6 pins..
so it need the same rewiring... etc.. but the main thing is different brand!! ?? !!
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Barney · Spanner Monkey Joined: 17 Jun 2005 Karma :

Sorry to hi-jack the thread but can you recommend a multi meter? I think a high voltage ruined the cdi on my previous bike, expensive job so worth getting everything right.
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CG125|CB400SF|CBR600FX|Triumph Daytona T595|CBR929RR

Zeeky · Two Stroke Sniffer Joined: 30 Mar 2009 Karma :

urban tiger · Derestricted Danger Joined: 25 Mar 2009 Karma :

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Firstly the regulator rectifiers are often interchangable, sometimes with some minor wiring changes required, but there are a couple of different varieties.

The one on my FZR600 was the same as the one on my TZR250 (indeed, took off one to sort the other).

As to multimeters, for most basic uses it doesn't matter too much. Analogue ones can be useful to see a change (such as a pulse in voltage) but this is probably not essential to most people and they are a lot more expensive. Digital ones vary greatly in price. I have 1 decent one I don't use that often and a couple of cheap ones (the cheap ones were £5 for 2 from Maplins) that do 90% of what is required.

All the best

Keith
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