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Author Topic: CB360 spark problems  (Read 1414 times)

Offline Maritime

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Re: CB360 spark problems
« Reply #20 on: Aug 02, 2018, 15:59:05 »
If there is a wire with a short, all you had to do was wiggle it the right way installing the coils and make it blow fuses.  check all the wires you wuld have touched or moved while putting the coils in, one must have a crack or something and is now touching the frame or another wire.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
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Online Sonreir

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Re: CB360 spark problems
« Reply #21 on: Aug 03, 2018, 14:28:49 »
What coils are you using?

Stock coils (five Ohm) and headlight alone will pull 8A. Pretty easy to pull an extra two and blow a 10A fuse.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

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Custom Wiring Harnesses

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Offline tahitianrider

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Re: CB360 spark problems
« Reply #22 on: Aug 03, 2018, 16:40:04 »
If there is a wire with a short, all you had to do was wiggle it the right way installing the coils and make it blow fuses.  check all the wires you wuld have touched or moved while putting the coils in, one must have a crack or something and is now touching the frame or another wire.

Yeah you're right I'm gonna check that again.

Quote
What coils are you using?

Stock coils (five Ohm) and headlight alone will pull 8A. Pretty easy to pull an extra two and blow a 10A fuse.

I'm using high voltage coils I found on ebay, not sure of their reference, here is a picture.

Yeah the 10A was just a temporary fix because I did not received my 15A fuses yet
'94 BMW K75 Racer
'84 Yamaha XJ 600 "Rocket" Racer
'76 CB 360 old school cafe
'96 CM 125 Brat bike
'80 CX 500 soon to be racer
'K15 MT-07 "The only bike I can actually use everyday" lol
www.tomracingdesigns.com

Offline crazypj

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Re: CB360 spark problems
« Reply #23 on: Aug 03, 2018, 23:06:13 »
Check you have the insulating washers in correct place on points bolt. You probably have a green wire plugged into a red/green somewhere or another earth/ground lead in wrong place. It sounds like it's going through some sort of load or fuse would blow instantly. 10 amp will work as long as you don't have any lights on. If you have an old indicator/bulb holder (21w~23w bulb) connect it across fuse contacts. (leaver fuse out, alligator/crocodile clips on leads) If you have a short, the bulb will light up. Leave it there while you check various connections.It saves on blowing a ton of fuses while troubleshooting. The light green/red neutral wire is a grounding wire, it normally will have battery voltage after neutral light bulb (bulb is load so fuse doesn't blow) If you have bulb holders in speedo and tach, neutral will have black in and red/green out
« Last Edit: Aug 03, 2018, 23:12:15 by crazypj »
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Online Sonreir

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Re: CB360 spark problems
« Reply #24 on: Aug 06, 2018, 13:14:47 »
Do you have a multimeter? If so, can you measure resistance between the black and the green wire for the coil?
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline tahitianrider

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Re: CB360 spark problems
« Reply #25 on: Aug 06, 2018, 13:41:22 »
I just received my 15A fuses but did not had the time to work on the bike today,

Quote
Do you have a multimeter? If so, can you measure resistance between the black and the green wire for the coil?

I just checked the resistance between the black and green wires and I have 0.00 ohms on both coils... (multitmeter set to 20k), shouldn't that be 3 ohms?? Did I just get ripped off buying brand new broken coils?

Quote
Check you have the insulating washers in correct place on points bolt. You probably have a green wire plugged into a red/green somewhere or another earth/ground lead in wrong place. It sounds like it's going through some sort of load or fuse would blow instantly. 10 amp will work as long as you don't have any lights on. If you have an old indicator/bulb holder (21w~23w bulb) connect it across fuse contacts. (leaver fuse out, alligator/crocodile clips on leads) If you have a short, the bulb will light up. Leave it there while you check various connections.It saves on blowing a ton of fuses while troubleshooting. The light green/red neutral wire is a grounding wire, it normally will have battery voltage after neutral light bulb (bulb is load so fuse doesn't blow) If you have bulb holders in speedo and tach, neutral will have black in and red/green out

I will check the points bolts again but I just changed the contact breakers and paid attention re installed them correctly,
The 21w bulb instead of the fuse is a great idea! I don't think I have that in my garage unfortunetaly :(
'94 BMW K75 Racer
'84 Yamaha XJ 600 "Rocket" Racer
'76 CB 360 old school cafe
'96 CM 125 Brat bike
'80 CX 500 soon to be racer
'K15 MT-07 "The only bike I can actually use everyday" lol
www.tomracingdesigns.com

Online Sonreir

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Re: CB360 spark problems
« Reply #26 on: Aug 06, 2018, 13:42:38 »
I just received my 15A fuses but did not had the time to work on the bike today,

I just checked the resistance between the black and green wires and I have 0.00 ohms on both coils... (multitmeter set to 20k), shouldn't that be 3 ohms?? Did I just get ripped off buying brand new broken coils?

Three Ohms should be the absolute minimum. Five Ohms would be better, in my opinion.

Set the meter to 200 and try again?
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline tahitianrider

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    • tomracingdesigns.com
Re: CB360 spark problems
« Reply #27 on: Aug 06, 2018, 13:52:17 »
Three Ohms should be the absolute minimum. Five Ohms would be better, in my opinion.

Set the meter to 200 and try again?

Still 0 Ohms with the multimeter set to 200, damn! Hopefully I'll be able to get my money back through ebay/paypal.

I did check the secondary resistance too (green wire to plug cap) and I have a correct 14.6 ohms
'94 BMW K75 Racer
'84 Yamaha XJ 600 "Rocket" Racer
'76 CB 360 old school cafe
'96 CM 125 Brat bike
'80 CX 500 soon to be racer
'K15 MT-07 "The only bike I can actually use everyday" lol
www.tomracingdesigns.com

Offline crazypj

  • Posts: 13199
  • Split personality, I fake being smart
Re: CB360 spark problems
« Reply #28 on: Aug 06, 2018, 14:00:34 »
Pretty much any bulb holder and bulb wirth some wires will work, old tail light, automotive.With the bikes you have listed I would think you have an old indicator or something?
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline tahitianrider

  • Posts: 43
    • tomracingdesigns.com
Re: CB360 spark problems
« Reply #29 on: Aug 06, 2018, 14:07:52 »
Pretty much any bulb holder and bulb wirth some wires will work, old tail light, automotive.With the bikes you have listed I would think you have an old indicator or something?

Oh okay, yes I totally have that! I have many indicators and tail light units, I didn't think an old school type indicator bulb was 21w ! I though I needed a headlight assembly for that much watts.
I will make something out of an indicator when I'll search for that short in the wiring, thanks for the trick :)
'94 BMW K75 Racer
'84 Yamaha XJ 600 "Rocket" Racer
'76 CB 360 old school cafe
'96 CM 125 Brat bike
'80 CX 500 soon to be racer
'K15 MT-07 "The only bike I can actually use everyday" lol
www.tomracingdesigns.com