Hey all, been a lurker since I got my bike in August 2016, which I think has helped me diagnose my issue thus far but seeing as some confirmation would be good, and the riding season is starting back up here in Canada, I figured I'd join in on the fun.
I stopped riding first week of December and have basically had the bike hooked up to the battery charger in the garage all winter barring a week or two. A few times over winter I noticed the bike wouldn't start but I assumed it was due to the cold/not having it hooked up to the charger for a week or so. When I had it charged up, would start and run absolutely fine, as it has for the past few weeks. But I noticed more so in the past week or so when weather has been good, after I ride it around and bring it back in, within a few days of not riding if it isn't plugged in there won't be enough juice to start it. Plug up to the charger and once it's charged all is well again.
I assumed a week ago it might be a charging system issue from reading so much on here. Finally after the bike died less than an hour after it was fully charged (was teaching brother how to ride in a parking lot nearby), and having to push start (worked the first time!) and get home, I figured I'd look into things.
Using a multimeter on two occasions (my crappy digital and analog multi and then my uncle's proper one) I've found:
Stator yellow wires: Ohm readings are inline with what the GV250 EFI Service Manual says, and the AC Volts from the analog multi shows ~60V at idle and higher than that as I revved the engine.
Battery: Now it wasn't fully charged as I'd been tinkering prior, but on my uncle's multi with the bike off it read 12.6v, once started (on one occasion we measured starting and it quickly dipped to 10.something volts before heading back up) it would read 13.6-13.8v. When revved to 5000 RPM the voltage would drop by 0.2v roughly. Eventually from idle/high revving, the idle voltage creeped up to 14v, but would still drop a little when at 5000 RPM and only show similar idle voltage when at ~10,000 RPM
R/R: unplugging the 3 and 2 pin connector and checking the ohms, I wasn't able to get any readings from most of the pins except for one or two. According to the service manual, I should've been getting them.
My guess has always been that it's the R/R, does this info back that up? I just feel like it's odd that this happened considering the bike has only 5100 km (previous owner only did 2200 km on it) and it functioned absolutely fine from August 2016-December 2016. I should note the previous/original owner installed 2 small led strips along the gas tank and 2 even smaller ones at the rear fender as running visibility lights. There's also two driving lights that are installed to a switch that has been off/I very rarely ever use.
Anyhow, thoughts? Does it look like my battery and stator are okay, and that it's just the R/R somehow? Also regarding the Shindengen R/R from Roadster Cycles, which kit should I be getting? I assumed the Hyosung Link kit but I've read otherwise from certain threads? I just want to make sure I'm ordering the proper thing as it's going to be quite pricey for me here in Canadian $ and being a novice rider and student, I'm all eager to ride without trying to make any costly mistakes.
Cheers, thanks in advance, and sorry for the extra details. I love this bike and just want to get to riding it!