Honda CG new engine help!

[sowa616]

hello everybody thanks for visting my post i hope you can help. im having trouble with my bike i bought it not long ago its a honda cg br-j 1988 model.

basicly the problem is my engine packed up so ive put a new engine is its the cdi version as you know my current bike used the old points type and not the cdi type so ive had to strip the old loom and put the cdi loom in i had spare.

so with this all done the bike has the cdi engine in with the new cdi loom ive manged to kick the engine over and it works but the battery doesnt seem to be charging. i put my multi meter across the battery with the engine on and the voltage is 12.57vdc i increase the revs and the voltage is still the same so im concerned weather the generator is working ive read through the haynes manual but i cant figure it out.

is there a way of checking the voltage output of the generator with the wires that come out of the engine it self were it connects to the loom off the top of my head theres like 6 or 7 wires that come out of the sprocket cover of the engine i know one of them is a ground and the other is netural wire the others i dont know looking at my scematics they seem to go off to the cdi and reg and that.

all i know is ive connected the the igition to the loom/regulator and coil and spark plug and the connector that comes out of the generator.

if anyone can help id much appreactie it thankyou mike

[abc123321]

man that sounds a complex job
____________________
You get what you give in life.

[sowa616]

[N cee thirty]

stick your multimeter probes in before the rectifier and see what its giving out there
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[TheSmiler]

Not that much help but based on the old wiring diagram (they are virtually the same). Might help you sort the wiring out when you get round to it.
https://4.bp.blogspot.com/_SdHL6QEmPKM/TOnGzDDKQyI/AAAAAAAANDs/Kk0DP4r9rbo/s1600/honda-cg125-wiring-diagram-single-cylinder-engine.jpg
____________________
CB125>CG125>GN125>ER5>K100RS>R1100RS>K100RS
A2 completed 23/07/15 Ready for the Golden Crisp Packet

[sowa616]

[N cee thirty]

hmm follow the wire down to the generator for any breaks and see if there's a connector further down the line to check again
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[sowa616]

[N cee thirty]

clean up earth points

these generators arn't amazing and neither is the battery size pre -electric start so its gotta be fully charged to power all the lights without dimming
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[sowa616]

which i may add i think either the gen is at fault or the reg/rectifier i know im just reapeting whats been said but it just seems odd i know all my earths are good and there are no shorts ive checked.

[sowa616]

yes! i fixed it turns out i blew the fuse thus a break in the circuit from the battery to the reg i then replaced the fuse and bam the bike comes to life. the battery charges when throttle is opend to full i get about 15vdc the lights all work all i got to do now is neat the wires up tuck the loom on the bike and im done. i must of blown the fuse earler without knowing and made a short somewere.

ill post some pictures once i got her all fixed up thanks for your help