Charging/electrical question
Posted: Tue Apr 28, 2020 7:53 pm
Seems like all I do when I post here is look for help.
So I've been having strange running issues with my P750 for a season or so. Most recently, I (finally) did the starter mod, with the extra solenoids last season - and that was amazing. The bike has never started or run so well.
Fast forward, and the running issues crept back in. Long story short, the bike just felt like it was drowning. It couldn't get out of its own way, I'd have to feather the clutch for 100m just to get going from a light. It felt fuel related, but it also felt electrical-related, because every now & then, for a split second, I'd get a burst normal performance.
Which brings me to today: I've got a 2yo AGM battery with a fresh charge - literally 5 minutes between taking it off the charger and putting it in the bike. Here's what happens:
1. Key out of the ignition, I've got 12.4v in the system.
2. Turn the key to run, it drops to 9.9-10.0v on the system.
3. Hit the starter, and I only get clicks from one of the new solenoids.
4. Now I have like 9.6v on the system.
I figured that 9.9-10.0v I saw right off the bat was a bad sign; I didn't think I'd have enough to spin the starter (and I was right, yay me). So I cleaned up the connection for the positive battery-to-starter lead. And I noticed one of the older clips on one of the coils had melted, so I replaced that (wire terminal) well.
When first I tried this the other day the starter tried to turn, and died. That's when I started watching the voltage, and decided I'd make sure the battery was full up before taking another look at it.
So that's where I am. I assume something is eating a lot of voltage right off the bat. Coil? Stator? I don't know what to test next, or how to test it. I do have a DMM, but I'm not sure what kind of voltage I should be looking for, for which component.
Any & all suggestions appreciated.
Jake
So I've been having strange running issues with my P750 for a season or so. Most recently, I (finally) did the starter mod, with the extra solenoids last season - and that was amazing. The bike has never started or run so well.
Fast forward, and the running issues crept back in. Long story short, the bike just felt like it was drowning. It couldn't get out of its own way, I'd have to feather the clutch for 100m just to get going from a light. It felt fuel related, but it also felt electrical-related, because every now & then, for a split second, I'd get a burst normal performance.
Which brings me to today: I've got a 2yo AGM battery with a fresh charge - literally 5 minutes between taking it off the charger and putting it in the bike. Here's what happens:
1. Key out of the ignition, I've got 12.4v in the system.
2. Turn the key to run, it drops to 9.9-10.0v on the system.
3. Hit the starter, and I only get clicks from one of the new solenoids.
4. Now I have like 9.6v on the system.
I figured that 9.9-10.0v I saw right off the bat was a bad sign; I didn't think I'd have enough to spin the starter (and I was right, yay me). So I cleaned up the connection for the positive battery-to-starter lead. And I noticed one of the older clips on one of the coils had melted, so I replaced that (wire terminal) well.
When first I tried this the other day the starter tried to turn, and died. That's when I started watching the voltage, and decided I'd make sure the battery was full up before taking another look at it.
So that's where I am. I assume something is eating a lot of voltage right off the bat. Coil? Stator? I don't know what to test next, or how to test it. I do have a DMM, but I'm not sure what kind of voltage I should be looking for, for which component.
Any & all suggestions appreciated.
Jake