Got a new XJ750RH seca which won't start after 2 rides

So I bought a seca, the test ride (going up and down the street) went well with nothing going wrong other than a persistent battery warning and riding it back home via the highway it got up to speed no problem (battery warning didn't go away). I got another good ride out of it before the 4th time starting it and it struggles to turn over before all noise from it stopped. All I get from it pushing the start button is a click, no turning noise whatsoever. I've got a new battery charging right now, replacing a blown fuse and am gonna replace oil and filter, air filter looks clean, but was wondering if there was anything else that could be wrong, mostly because on starting there was no turning over noise

 

Blown fuse was probably (definitely) from me using a car charger to try and charge the battery. I have since leaned I had made a mistake and bought an appropriate charger

 

Keep that battery charged to peak if you can. Our bikes need peak 12vdc to have good spark. Glad you found the issue and are working through it/them.

 

Just a note, the battery warning won't go away. The original system had an extra mid-cell sensor that doesn't exist in new batteries. There's a modification to fix that, but I wouldn't worry about it yet. If it runs, or ran, that's a good start. No crank with a click means your starter solenoid likely has power from the start button, but either the solenoid has failed, or the starter. Solenoid is the most likely culprit and much easier/cheaper to repair. A completely shot battery could explain it also, but typically as a battery goes bad it will crank but not fire (Timbox comment on full 12V!!).

Depending on storage conditions, these old bikes can wind up with electrical connections throughout that need cleaning. Corrosion/bad connections at the original glass fuses is another trouble spot. Troubleshooting the starter solenoid is a good first spot to check.

 

Well we can rule out the battery and fuse being the problem. I'm going to get a solenoid and see if that gets her going. Thank you all for the suggestions

 

You can bridge the solenoid contacts with a screwdriver to see if the starter motor spins.

 

a 4500 ohm resistor from the white/red tracer wire to the positive side of the battery will trick the atari into thinking the battery is all good. The sensor works on a separate probe in a battery cap to develop 8.4v. Computer sees zero volts it assumes a battery issue because the water is low, anything above about 10v the computer assumes battery issue from an overcharging condition. The 4500 ohm resistor approximates a "good" battery condition and puts the silly BAT warning to sleep.

 

If you're lazy like me, @chacal can hook you up with an installable kit to do this - the proverbial easy button.

 

Right, I'll see if that does anything, once I find out where the solenoid is. Would giving a push start get her going if it's the started that's malfunctioning? Not to do much more than get her running for after an oil change/cleaning. I live on a hill

 

Solenoid is located just to the left of the battery itself, two thick red wires coming from rubber covers plus two smaller wires that terminate in a plastic plug. Solenoid itself is tucked down in a rubber mount attached to the plastic battery frame.

 

I like lazy especially when it involves bacon.

 

Push start will work.

 

That roll down the hill works well, unless it does not start and then you have to push back up the hill.

 

So I reckon the starter and solenoid are messed up. We unplugged everything and plugged it all back in again and it wanted to turn over before going back to the clicking. Was able to just get a running start to get it started and running on flat ground

 

Personally I wouldn't fool around, starter solenoid is cheap. Starter on the other hand is a bit more involved but a brush kit can be had on Amazon for a few pence.

 

Did you at any point put a Voltmeter on it?
As already suggested, if no response to the start button a quick test of the solenoid is a screwdriver across the terminals - just don't be girly about it, or things might melt - jam it in there hard -ish.