El Toro Joe wrote: ↑Sat Feb 03, 2024 8:50 pm
So I got a new Yuasa battery last year and it's been on a tender since the last time I rode it in December. Today I rolled it out of the garage to wash the wife's SUV, and when I went to pull it back into the garage it cranked slow but did start. Could there be something drawing power?...everything that I have is run through a fuseblock under the seat. Any ideas?
Are you using a Battery Tender Jr. or the real one? I assume you've plugged it in again. Time to get your voltmeter out and check the battery resting voltage.... fully charge, disconnect, do an ignition on/off cycle (kill switch in Run), shut it off and check voltage at the battery after letting it sit overnight. Whatcha got? Should be 12.8 or more.
You could check the charge while the Battery Tender is hooked up and is showing green.... should be ~13.2V
You can check your fuseblock and put a voltmeter to each fuse.... two wee metal contacts on top of each fuse... voltmeter to the incoming side will have 12V if that circuit is live (if you configured it that way) and will have 12V on the other contact too. For a switched circuit, there should be no voltage on either until you turn on the key.
For those that are configured live, check the device, i.e., USB charger, phone charger, voltmeter, etc. All those will have a draw. GPS cradle if you have it live, is not using any power as long as the GPS is not in the cradle.
Having said all that, it's possible to have a perception of slow cranking.... have you tried it since? I'd just monitor each time you start it for the next few rides and see if it happens again.