[american_corse]

Ok I’ll try to keep this as short as possible.
So this past November I put the bike away with no problems and now it’s February with better weather and I wanted to ride. The battery was naturally dead so I just decided to buy a new one but this time a bought Lithium Ion battery for the weight. I install the battery and fire it up, no problem. Now riding, the battery light comes on.
So back at home, I check and the connections are fine but the 30 amp fuse behind the battery under the seat was blown. Put a new one in it and the light it still on. The battery light flickers at idle and is solid at higher rpm while riding.

Now not to sound dumb, but I’m sure it’s not the battery even thought there was nothing wrong before. It sounds like an alternator not charging coincidentally.

Has anyone experienced this? how difficult is it to change the alternato?

Now to check I know I need a multi meter but I don’t have one right now so I get one.

If anyone could help me out that would be great.

Thank you!

 

[silentservice703]

First, that fuse should be 40 amp...
Second, lithium can present charging issues if the battery wasn’t properly fully charged prior to installation.
Third, ensure you installed ALL of the wires in their correct locations.

 

[american_corse]

First, that fuse should be 40 amp...
Second, lithium can present charging issues if the battery wasn’t properly fully charged prior to installation.
Third, ensure you installed ALL of the wires in their correct locations.

Is this because the alternator has to work harder that I need the 40 amp fuse?

 

[silentservice703]

No, the stock fuse is 40 amp. Starting current is very high. The start solenoid wiring should periodically be inspected for corrosion and loose connections. Just give the connections a squeeze with some needle nose pliers to keep a tight clean connection. This is a class problem.

 

[ahaussmann123]

Same thing happened when I put a Shorai battery into my Brutale 750, blew that main large fuse, caused an alternator light until I fixed it (right away hahah), the rest on the SPU are mini type.

it was probably because of improper charging before swapping, you’re supposed to put it on a lithium tender beforehand... whoops.

I’m going to have to disagree with silentservice for the first time ever, I’m fairly certain it’s a 30amp full sized auto fuse for the main circuit. I got like 5 or 6 backups in case it happened again.

Paranoia note: not too long after I did the battery swap my SPU started to go to piss, tach wouldn’t start intermittentlyeventually SPU burst into flames after I shorted a blinker a year or so later. it was the old blue one, not sure if related. Keep an eye out!

 

[silentservice703]

I’m going to have to disagree with silentservice for the first time ever, I’m fairly certain it’s a 30amp full sized auto fuse for the main circuit. I got like 5 or 6 backups in case it happened again.

Well, here we go...you be the judge.

 

[ahaussmann123]

Headed to the garage to take a peek, will update with anecdotal evidence. I’m an ‘04 if that makes a difference, though I do know the fuse was red, not sure if they make red 30 amps i could just remember wrong. Will find out later today probably!

 

[silentservice703]

Fuses, at least in the US, are universally color coded.

 

[AgustaRod]

They are in the UK and it is 40amp my Yamaha replacement came with 30amp fuse they are loaded to 70 amp so can carry 40 amp no problem.

 

[ahaussmann123]

Correct as usual, it’s a 40 amp.