Battery and electrical contact

Yamaha FJR Motorcycle Forum

Help Support Yamaha FJR Motorcycle Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

FJRBluesman

Some call me... The STIG!
FJR Supporter
Joined
May 23, 2007
Messages
6,073
Reaction score
165
Location
Orange County, CA
So one purpose of this forum is too pass along little tidbits to help others (aside from trying to find Bust a sheep, banning Johnny80s, and posting pictures of beemerdons as a known donkey rider). Heres my 2 cents again. Remember this post? Well heres a follow-up.

My battree (battery for you non-Canuckleheads) has been spinning a little slower than normal in the morning, and now lately when I leave from work too. So I just continue to ride as long as it starts. This morning it was real slow, kinda worried me. It labored pretty good after work, that really concerned me. A block from work sitting at a light the bike just dies. I hit the starter, no dash, it just goes dark, just a click, great. OK, puller over to the side, and have it in neutral and it fires. I kept the throttle at 1500 RPM at lights. On the freeway Im getting a mild surge again. Thoughts form my summer trip come to mind (see post above), ....but… I tightened that thing pretty good on the trip, and then one of the other riders gave it a ¼ turn more, which worried me it might strip..... Anyway back to the present, the bike starts surging more. As I get closer to home, it accelerates like its hitting on 2-3 cylinders, I barely make it home.

I pull the dash panel tupperware and low and behold the terminal moves freely, not like last time where the bolt backed out quite a bit. None the less its loose and making poor contact. On closer inspection and troubleshooting I discover this little gem.

P1060604.jpg


Looks like the rubber insulator for the positive terminal is between my terminal and battree post. This is not evident when installing the terminal. If I hadnt try to scuff up the bottom of the terminal I would have missed it again. So maybe thats why it comes loose. Not only that, maybe due to it loosening up, the terminal gets oxidized a little as seen in the pic.

P1060607.jpg


Note the copper is dull and not shiny. Since its loose and getting oxidation over time the contact gets worse etc., and performance of the battree goes down until you get the dreaded electrical surge from no juice but the alternator. FeeJs dont like that.

So I didn't forget to tighten that down last time. But I have something to look for each time I reinstall the terminal.

So kids, make sure the rubber piece of the positive terminal is NOT between the terminal and post, check your terminals regularly. Ride save have fun and look out for sheep.

 
Last edited by a moderator:
The symptoms that you speak of as you ride are from the power surge of the battery /Stator not getting solid continuity? The day I picked up my FJR the battery was dead. The seller gave me back $100 of what I paid for the bike due the inconvienence., I bought an OEM Battree at Bellflower Yamaha, Removed the plastic to get at the battree and noticed the same red post plastic under the Hot lead and terminal bolt. I took out my Xacto knife and trimmed some of the fatty excess off. I periodically check the posts and have to retighten now and then. dr

 
With the 2 extra wires I have attached to the hot lead of the battery, I trimmed that red cover some to allow for the wires to come out without holding the cover up. It also allows for a good, solid contact...

Dielectric grease on the terminals is also highly recomended...

 
Last edited by a moderator:
Top