26-06-20, 09:45 AM
(26-06-20, 09:05 AM)Gnasher link Wrote: Check the voltage across the battery when the bike is running at 6500k, you should have 14v if so the charging system is fine. Hopefully what you've got is a badly discharged battery in which case you just need to replace it.
I'd also suggest you look into how this has happened, or it very possible it will just happen again. One of the biggest causes is cheap batteries, some mainly Chinese ones are just crap, especially gel types, OE spec (Yuasa) is around £80 odd, you can get a Chinese rip off for as low as £20 odd and everything in between. They aren't in most cases apples for apples either OE is 11Ah and 230v ish, cheaper are 9Ah and 150v ish, the latter will not last.
It's up to you but as with everything you get what you pay for, my advice go for OE, or if you're on a budget something like Varta. As you found out and just got away with it, they fail without warning luckily you made it home, had you not you'd be looking at recovery and all the potential cost and inconvenience that goes with it.
Fingers crossed just a naff battery
Just did that this morning actually and there definitely a problem ☹
The reading is 12.58 while the bike is off then once started it drops to 11.99/12.01
The battery is knackered as I couldnt even get it to charge to more than 13v in the first place so its getting replaced. It was a cheap one as it was bought as a quick fix at a time when i was running a bit skint but to be fair its lasted nearly 4 years so its done well for the £30 it cost haha
Sportsbikeshop currently have the Yuasa on sale at £70 (£40 less than halfords) so will more than likely be going for that.
Question now is how to i test the other parts of the charging system?
I've checked the voltage on the rectifier and seems consistent but honestly don't know what I'm looking at haha
Obviously the last port of call is going to be the stator (as that requires ordering a gasket to check so I will eliminate the ither options first)
I'm getting a positive reading on the multistage from the plug but thats as far as I've looked so far.
Knowing my luck its going to be the rotor magnets ??