2010 Fat Bob FXDF

No codes.

Fresh plugs and wires.

https://www.bitchute.com/video/fsAejawG1JCO/

https://advbikes.com/data/video/20/2...9e49a70be9.mp4

There's two videos there. Not sure which will work.

Bike sometimes fires right up. Other times it just spins. I think the starter is engaged? Definitely feels like there's drag of it turning something. You can also smell the fuel after a few crank and it not firing. Now and then you'll get a terrible scratching sound- sounds like metal on metal grinding.

CPS perhaps? Not firing when its supposed to?

 

Weak battery, loose battery terminals.

 

Battery is less than a month old. If not ridden in a few days, its on a tender.

I'll check the terminals though.

 

All terminals snug.

 

are they CLEAN of rust and chit?
Wire brush!!
Have battery load tested!!
New ones can be bad too!

 

yea, I just put a brand new battery in. Also rigged up a USB plug for phone. when I did that, all terminals are 100%. Look factory.

 

If battery wires up direct, the USB port is dragging down the battery. Check the voltage across the battery. Charge it up..

The way your motor turns over sounds like the battery is weak. Bet cranking voltage is below 10 volts.

 

yea, I'm chatting with a few folks on this now. I never would have guessed battery.

USB is wired direct with fuse. Nothing plugged in though. All my other bikes are wired the same without issue.

I am running this in there now: https://www.napaonline.com/en/p/PSBE...pressionRank=1

Though, I've had **** luck with NAPA batteries the past year so it wouldn't surprise me.

I guess I'm in need of 500CCA?

Harley shows this as a direct replacement:
https://www.harley-davidson.com/us/e...ery/p/66000343

But what sticks out to me is:

Question:
6/22/2022
What are the specs on this battery? What is the CCA, AH, and RC on this battery?
Russell - Baton Rouge, La
Answer question

• Answer:
  Hello Russell. Part number 66000343: specs 18AH, 275 Cold Cranking Amps (CCA). Fitment: Fits '07-'17 VRSC™ (except '07 VRSCR), '97-'03 XL, and '97-'17 Dyna® and '97-later Softail® models. Also fits Buell® S1, S3/T, M2, and X1 models. Thanks blairmke
  blairmke

Only 275CCA?

 

Well it's an east penn battery.. Same as HD. Bet your other bikes are baggers with a 30 AH battery..

There is likely a power supply in the usb converter that drops battery voltage to 5v.. It likely draws a few ma without anything plugged in..

 

My others bikes are 650s.

DR and a GSX, heh. I don't think I've even swapped either of those batteries out at any time I've owned them.

I yanked the battery. I'm going to take it to NAPA tomorrow and have them drop test it. see what it comes out to.