Fire

[Ribert R]

Ok I have the Big dog Mastiff. I have fire to the coil and to the plugs and when I turn it over it goes from 12.3 down to in the 6’s. It won’t start. I have only a 310 caa battery on it. What should my cold cranking amps be for the S&S 107 EFI


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[HMAN]

Find a Deka ext 20L
And welcome from Kansas

 

[Mr. Wright]

Yes, what hman said. Deka battery 310cca is all we recommend. You have a shorted cell in the battery you have.

 

[Ribert R]

Ok I’ll go for the delka battery


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[Mickmorris]

Ok I have the Big dog Mastiff. I have fire to the coil and to the plugs and when I turn it over it goes from 12.3 down to in the 6’s. It won’t start. I have only a 310 caa battery on it. What should my cold cranking amps be for the S&S 107 EFI


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Battery is tits up. Probably a bad cell. Deka or Braille best you will find for these bikes.

 

[Ribert R]

I ordered the Deka


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[Mr. Wright]

While your waiting on it, clean the contacts on the starter solenoid.

 

[Ribert R]

I ordered the deka. 3 to 5 business days


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[Mikeinjersey]

I ordered the deka. 3 to 5 business days


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Hopefully your EHC didn't get toasted when the battery went south. If the bike doesn't already have a fuse or circuit breaker between the battery and EHC now would be a good time to install one.
You will see a circuit breaker on the bike but that protects the battery from the VR. Stock bikes didn't come with the extra breaker needed to protect the EHC from the battery shorting out.