CBRiderNYC
CB750 Member
Hi I’ve got a 1982 Honda CB900F Super Sport a that is having charging issues (I also plan to switch to an antigravity lithium ion battery but currently I am still using a New Lead Acid Battery in the Bike)
Currently at idle it only puts out 11.7-11.8Volts DC & @5000 just barley hits 13.1-13.5
The previous owner replaced the rotor and stator & I have put a new ricks lithium ion rated regulator rectifier on the bike. (it caps out voltage @ 14.5V so as not to damage the lithium battery)
The first step I took was to replace the brushes since they were a bit worn, and had some success, the bike is charging better. I can now get about 3 or 4 rides out of it before the lead acid battery dies on me. (But it’s still putting out not enough volts to support a lit ion battery which needs at least 13 to start charging)
I’ve test the rotor and measured 6.4 ohms across the slip rings. (This seem high and out of spec to me) I’ve also confirmed that it is not shorted to ground.
The stator appears to be ok. I test continuity across the three yellow wires and measured 1.1 ohms (a bit high but I’ve heard this is acceptable) When testing the ohms between the Black & White on the 6 pin connector I’ve gotten mixed readings. Sometimes it reads 36ohms and other 11ohms The connection to brushes themselves is fine. I test from the tip of the brush to the black and white wires on the 6 point connector and got 0.7 ohms.
I’ve currently ordered a replacement rotor from ricks but wanted to make sure that is the best next step and see if anyone has any ideas on if there are other test that I could preform.
Thanks for any help with this issue.
Best,
Andrew
Currently at idle it only puts out 11.7-11.8Volts DC & @5000 just barley hits 13.1-13.5
The previous owner replaced the rotor and stator & I have put a new ricks lithium ion rated regulator rectifier on the bike. (it caps out voltage @ 14.5V so as not to damage the lithium battery)
The first step I took was to replace the brushes since they were a bit worn, and had some success, the bike is charging better. I can now get about 3 or 4 rides out of it before the lead acid battery dies on me. (But it’s still putting out not enough volts to support a lit ion battery which needs at least 13 to start charging)
I’ve test the rotor and measured 6.4 ohms across the slip rings. (This seem high and out of spec to me) I’ve also confirmed that it is not shorted to ground.
The stator appears to be ok. I test continuity across the three yellow wires and measured 1.1 ohms (a bit high but I’ve heard this is acceptable) When testing the ohms between the Black & White on the 6 pin connector I’ve gotten mixed readings. Sometimes it reads 36ohms and other 11ohms The connection to brushes themselves is fine. I test from the tip of the brush to the black and white wires on the 6 point connector and got 0.7 ohms.
I’ve currently ordered a replacement rotor from ricks but wanted to make sure that is the best next step and see if anyone has any ideas on if there are other test that I could preform.
Thanks for any help with this issue.
Best,
Andrew