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Author Topic: Cb550 failing condensers  (Read 2802 times)

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Offline Anthub

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Re: Cb550 failing condensers
« Reply #25 on: July 08, 2020, 08:56:42 AM »
Quote from: bryanj on July 08, 2020, 08:54:42 AM
Cancel it quick, they take too much power
I’ll message you


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Online PeWe

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Re: Cb550 failing condensers
« Reply #26 on: July 08, 2020, 09:05:11 AM »
My CB750 runs both with Dynatek 5 ohm coils (black), points (TEC) and Hondaman ignition module which can work without condensers.
I had some misfires after 8000 rpm so condensers back in. Not much current for points nor condensers to handle.

I tried 3 ohm coils and Dyna-S. Battery discharged quickly with headlight on.  Traded in the coils to 5 ohms after 40 minutes ride.
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline USCG_C130

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Re: Cb550 failing condensers
« Reply #27 on: August 18, 2020, 07:45:40 PM »
I battled what i thought was constantly failing condensers, after changing 5 pair or more i finally got an electronic ignition, but it ended up being a power issue for me, since i had built my own wiring harness, i had somehow managed to get power to both my high beam and low beam relays no matter what position the head light switch was in, and i believe the big power draw and weakening battery is what was killing my condensers, either way i am very happy to have found that issue and gone and tossed the points. so far no issues with my electronic ignition. i hope that you resolve your issue
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Offline Anthub

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Re: Cb550 failing condensers
« Reply #28 on: August 18, 2020, 10:36:27 PM »
Quote from: USCG_C130 on August 18, 2020, 07:45:40 PM
I battled what i thought was constantly failing condensers, after changing 5 pair or more i finally got an electronic ignition, but it ended up being a power issue for me, since i had built my own wiring harness, i had somehow managed to get power to both my high beam and low beam relays no matter what position the head light switch was in, and i believe the big power draw and weakening battery is what was killing my condensers, either way i am very happy to have found that issue and gone and tossed the points. so far no issues with my electronic ignition. i hope that you resolve your issue
Thanks for that update mate... appreciated.
I have been running with the electronic ignition and new coils for around 6 weeks now and am very pleased with the results, with no charging issues. I also replaced the battery after experiencing some initial issues (had it tested and there was a dead cell) and as a result, everything is working well.


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