FZR 2KR charging system troubleshooting

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Aerojake
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FZR 2KR charging system troubleshooting

Post by Aerojake »

Hi guys,
Ran into an issue with the charging system on my 88 FZR 250 the battery isent staying charged any longer than 10 mins I have ran some multimeter checks and was hoping someone could make sense of the numbers im leaning more towards a stator replacement.

Battery voltage with bike off 12.5v
Battery voltage at 4000rpm 12.8v

R/R output 31v at 4000rpm on all 3 stator wire combinations

Amps between neg terminal and neg battery post 7.4A
Amps between neg terminal and neg post with R/R disconnected 7.2A (Runs permanent headlight)

R/R pins showing same values between all combinations off positive pin to all 3 stator pins and same values for neg pin to all 3 stator pins.

Resistance between stator coils on ohm 2000 setting =003 for all coil combinations.

Thanks in advance.
DonTZ125
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Re: FZR 2KR charging system troubleshooting

Post by DonTZ125 »

Your VRR has failed low, and isn't actually passing any power to the battery - annoying, but far better than having it failed high and frying everything in the harness!
Aerojake
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Posts: 8
Joined: Sat Mar 28, 2015 1:50 am

Re: FZR 2KR charging system troubleshooting

Post by Aerojake »

Just replaced VRR and tested all tests are good but still no charge to battery :headscratch: battery is new so I know its not that. All wiring and connections have been checked and thats all good.
Must be the stator ????
DonTZ125
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Re: FZR 2KR charging system troubleshooting

Post by DonTZ125 »

Check your battery condition - condition and security of terminals, level of cells, warped / cracked plates.
Aerojake
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Re: FZR 2KR charging system troubleshooting

Post by Aerojake »

Was in the middle of adding/editing my previous post when you replied.
DonTZ125
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Re: FZR 2KR charging system troubleshooting

Post by DonTZ125 »

If you have 31vac across all 3 legs, your stator is fine.
Aerojake
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Posts: 8
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Re: FZR 2KR charging system troubleshooting

Post by Aerojake »

Any ideas at what else it could be ??
I measures resistance at the stator plug and got 00.4 ohms across all combinations off the 3 stator wires.
Aerojake
Site Newbie
Posts: 8
Joined: Sat Mar 28, 2015 1:50 am

Re: FZR 2KR charging system troubleshooting

Post by Aerojake »

So just looking over the wires again and had a look at the flasher unit its a narva 145w flasher Im not to sure but 145w sounds a little excessive to me?
Aerojake
Site Newbie
Posts: 8
Joined: Sat Mar 28, 2015 1:50 am

Re: FZR 2KR charging system troubleshooting

Post by Aerojake »

charging problem is sorted now,
The replacement VRR i brought was no good so it must of been something dodgy with the old wiring cause i put old VRR back in and all readings are good and I pretty much rewired the whole bike lol 
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