SOHC.co.uk Forums > CB750

Wiring

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AshimotoK0:

--- Quote from: yozzer74 on March 03, 2016, 08:52:11 AM ---Thanks for the links .also any opinions on coils .are those cheap ones on eBay any good .

--- End quote ---

A lot of pattern coils are much lower resistance than standard so if you are using points they can be taking up to double the standard current which will reduce points life considerably. To be the same as stock Honda they should by typically around just less than  5 Ohms primary  DC resistance. Same basic coil on all SOHC 4's

gtmdriver:
The OEM coils on my CB350F were 4 ohm and the replacements from DS were only 2 ohm. While this is workable, if not desirable, with contact breakers it is unacceptable with some electronic ignitions. Boyer Bransden specify 4 ohms minimum.

I ended up wiring ballast resistors in series with the power supply to each coil.

watty51:
Cant understand why DS are selling these coils if they are no good. Just purchased a couple from DS and put them on my cb350f. I'm still running points, will they be okay or should I bin them ? 

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