Charging system issues
#1
Charging system issues
Hey everyone, I recently purchased a 1994 cbr1000f. It's my second motorcycle and I'm kind of worried about something. Thanks in advance, it's a bit long and detailed. When I got the bike the P/O told me he thought the stator ( everyone seems to call it an alternator on this bike so I'll start to after that mention) was bad. I checked it following the service manual found here http://members.iinet.net.au/~cbr/Hon...ice_Manual.pdf
Voltage at 5k rpms was 11.8
Stator coils were all .7-.8 ohms, field coil was 2.7 ohms, and battery voltage was found on the red/white wire and the green.
One pin on the stator (one of the connections to the stator coils) was not connected to any other pin, and the plastic was melted around it.
So I replaced the R/R with a cheap no name unit purchased on eBay. The motorcycle charged after that, 13.4 volts at 5k rpms. I didn't expect it to last long given the cost but it was within 50 miles and it failed again.
What bothers me is that it's the same pin that was damaged before. Am I just worrying too much? I rechecked the stator coils and field coil and they're still within spec. I ordered an Electrosport ESR230 as a replacement and really don't want to ruin another if there's something I'm missing.
Again thank you to anyone with any advice, or even taking the time to read all the way through it.
Voltage at 5k rpms was 11.8
Stator coils were all .7-.8 ohms, field coil was 2.7 ohms, and battery voltage was found on the red/white wire and the green.
One pin on the stator (one of the connections to the stator coils) was not connected to any other pin, and the plastic was melted around it.
So I replaced the R/R with a cheap no name unit purchased on eBay. The motorcycle charged after that, 13.4 volts at 5k rpms. I didn't expect it to last long given the cost but it was within 50 miles and it failed again.
What bothers me is that it's the same pin that was damaged before. Am I just worrying too much? I rechecked the stator coils and field coil and they're still within spec. I ordered an Electrosport ESR230 as a replacement and really don't want to ruin another if there's something I'm missing.
Again thank you to anyone with any advice, or even taking the time to read all the way through it.
#2
Welcome to the CBR Forum Kiddchaos,
Read and digest everything Naga_Thai has written in this link...........he has a lot of experience and knowledge in the area of regulator/rectifiers for the CBR1000F and the pitfalls of replacing with the incorrect, cheaper units.
REGULATOR RECTIFIER - http://tinyurl.com/734engf
Cheers, SB
Read and digest everything Naga_Thai has written in this link...........he has a lot of experience and knowledge in the area of regulator/rectifiers for the CBR1000F and the pitfalls of replacing with the incorrect, cheaper units.
REGULATOR RECTIFIER - http://tinyurl.com/734engf
Cheers, SB
#3
#4
From memory, Naga's write-up showed that the cheap regulator/rectifiers from Ebay were not suitable at all, even though they stated they were for the CBR1000F. That due to different wiring would fail quickly - which seems borne out by your post.
I hope the Electrosport one fixes your problems! Let us know!
Cheers, SB
I hope the Electrosport one fixes your problems! Let us know!
Cheers, SB
#5
#6
SB is correct about the e-bay cheap R/R's. The are not for a 3-phase charging system with an exciter coil that you have on the '94.
#7
#8
Well after the new R/R was installed I had about 15.7 volts at 5k rpm with the engine just off the choke. I rode for about 50 miles and my final check at home gave me 13.3 volts at 5k rpm. I guess the heat reduced the amount of current reaching the battery. But it was still charging. I'll keep an eye on it for the next couple hundred miles but I think I'm set. Thank you for your help guys. Hopefully I can contribute something to the community in the future.