Both speedo and gas gauge are not functioning...what would the cause be??? Thank you

 

Welcome to the Forum from Colorado!
Check all the grounds for the items involved. You'll be surprised how often this turns up in here.

 

I was going to ask which "soft tail".

 

Just a guess but maybe a fuse, there is a fuse for instruments and also one for accessories. Good luck.

 

When you say check grounds for items involved .....could you please help me understand where the grounds for these items are located.....thank you

 

The main bundle of grounds is under the seat just in front of the battery. Make sure they they are all intact-no broken wires no corrosion, good contact. Pull the dash with the speedo in it and look to make sure all the wires are intact and no corrosion. Check fuses as mentioned above. There is probably a ground wire from the bottom of the handle bar mounts to the triple tree, make sure it is there. Make sure the battery cables themselves are in good working order.
Hope this helps.

 

My last bike had several grounding issues; it had 2 coils, one to front cylinder and one to the rear. It also had 2 or 3 different metals involved in the grounding loop, which would also be subject to chemical corrosions because of the different metals involved (bolt + frame material + grounding lug= 3 different metals is bad). The bike manufacturer makes no difference, if that is the issue here, which I would suspect it to be. The easiest solution to the problem would be to create some type of grounding jumper chain. Like maybe jump the ground from the battery, to the frame, then back to the engine. When doing so make sure your connections are good and maybe also chase the threads with a copper based anti-seize. You should be able to hide all of these grounding jumpers, #8 or #10 wire should be more than adequate, just make sure you run multiple wires so that your bikes electronics are not dependent on one or two grounds.

You will still probabaly need to clean the terminals at all grounding locations every 2 years or less. But, the more grounds the better or they definetely cannot hurt.