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.

 

[Ribert R]

There is two breakers on it the guy I got the bike from said they installed a stage two thunderheart security with key fobs. Because he lost the first set of fobs. I don’t line the security thing, I’d rather have a key and a pistol.. go back to pickups in the nose cone, but I’ll get this one right not changing g anything. Would the injectors not pump because of a low battery or bad battery.


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[HMAN]

Weak/bad battery will bring on many different gremlins. See how it acts with a new one keep us in the loop.

 

[Ribert R]

Ok they said they rebuilt the hand control switches on the Mastiff. 04 frame, S&S 107, thunderheart security.So when I cut the switch to on and hit the key fob, the head and tail light stay on but the efi pump relay goes off. The dash lights work, the tail light and head light work but the power to the injector pump has nothing when I cut the switch to off and relay has power again, now I think it’s suppose to be the other way around. Could it be that when they rewired the hand controls , they wired the on / off switch in reverse.


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[Ribert R]

Now when I say the relay goes on and off , I mean there is power to the relay until I cut the switch to run then no power, headlight but no power to the relay. Cut the switch off and the relay has power


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[Ribert R]

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

It’s brand new and that is the battery I have. I’m starting to wonder if the starter is screwing up. I mean it turns the bike over but only once or twice


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[Mr. Wright]

It’s brand new and that is the battery I have. I’m starting to wonder if the starter is screwing up. I mean it turns the bike over but only once or twice


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Try cleaning the solenoid contacts

 

[Ribert R]

I’ll try it but why would I loose fire when I hit start. Everything works on the bike , the lights and all


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[Mr. Wright]

Clean the plug on your EHC with some electro cleaner, and apply new dielectric grease.