SOHC.co.uk Forums > CB500/550
CB550k1 US Import - UK registration
Oddjob:
I seem to recall it's a male and female connector on the black wire, that's so you can disconnect the rear brake light power feed and jump the black wire into there. As that's only live when the ignition is on it's an ideal point to take power from.
Laverdaroo:
Or just take a switched live from one of your spare outputs on the M unit straight to the Hondaman box as a key on power feed. There’s loads of options you can do with the M unit Dave. As we missed each other today, when you get back to it, giz a bell
Sent from my iPhone using Tapatalk
juitz:
Ok so have a new issue!
Changed my circuit so now have 12v supply to the coils as I missed this. Still not getting any spark at the points though, but have new OE ones now that I will install.
However, today playing around and checking the system I am blowing the main fuse again. I'm a bit confused as I can sometimes turn on and start cranking with the starter motor, but I started looking at the alternator and sometimes when I wiggle the green and white wires the fuse blows. This indicates a short to me.
It's just inconsistent that I can turn the ignition on and sometimes be ok, then moving the green / white cable can lead to the fuse blowing.
I've removed the sheathing and can't see any broken connections or insulation.
I do have a second and probably bigger issue that I damaged one of the dowel holes due to a broken bolt so alignment on the coil/rotor/stator is iffy. I had to do this with one dowel.
Should I start with a replacement field coil?
Took some measurements on the bench and got this
Field coil - 4.9ohm between GRN/wht on bench
Stator- continuitu between all 3 phases and 0ohm phase-phase resistance
Update:
Removed the stator so only had the rotor and field coil. Measured continuity between green and white to ground and at no position with the good dowel moving the cover around can I break continuity. Took off the gasket and same thing. No matter where I try and move its always grounded.
Taking off the good dowel and I can find a small position where it's not grounded.
There are signs of wear on the inner and outer part of the rotor but thought "it will be fine" when I put it back together as the field coil and stator looked ok.
So I'm thinking either field coil and rotor are buggered, or worst case and my nightmare is a bent crankshaft?
Oddjob:
Post a pic of the broken dowel hole, is it in the crankcase or the casing?
Remove the sprocket cover and make sure you haven't rushed any of the wires coming from the alternator against the crankcase, very easy to to this if you're not careful.
juitz:
--- Quote from: Oddjob on April 20, 2023, 12:03:30 AM ---Post a pic of the broken dowel hole, is it in the crankcase or the casing?
Remove the sprocket cover and make sure you haven't rushed any of the wires coming from the alternator against the crankcase, very easy to to this if you're not careful.
--- End quote ---
It's on the crankcase - the one highlighted here. I'll take a pic tomorrow
[ Guests cannot view attachments ]
No cover reithe as I haven't fitted this on yet as was looking for a replacement chain protector bracket. It does have the original cables but they looked ok. But the cables are now "floating" and off the frame.
The continuity to ground.check I did with the multimeter connected to the green and white wires coming.off the coils and to the battery gnd terminal. So nothing upstream of the circuit to short to ground.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version