Re: From 107 to 128
Posted: Wed Dec 20, 2023 6:31 pm
This bike is now wombles pissing me off. It's that frustrating it's making me ill. I'd sell it in a heartbeat if someone offered me the right money. I just want a bike that works.
I think I've made some progress with the starting issues but I've still got electrical problems, I think.
Starting seemed to be a combination of bad fuel, bad fuelling and weak spark. New plugs and coils, draining the carbs and messing about with the idle adjustment got it started. And it seems to run OK, as it did when I first got it running. But it doesn't start easily, which is just weird because it fired up virtually first time when I first got it going.
The electrical problems are weird. First I thought I'd killed a brand new battery trying to turn it over without the plugs in. It's a tiny lithium one from Ultrabatt but is meant to be good for 300CCA. They have a discharge protection circuit so that must have kicked in as when the battery was off the bike it was still showing 12v+. 30mins on the charger and it was full. Maybe it needs more than 300CCA but the old engine ran OK off a 280CCA battery. Using the car battery 450CCA got the bike going but wombles knows why it needs so much power. Can't just be the cold weather can it?
While it was running I checked the stator output and across all three phases it was putting out about 60V AC at about 4k rpm. Checking the R/R output that was about 15v depending on revs. It's meant to be one specifically for lithium batteries and not meant to charge at more than 14.1v. I was measuring the output directly at the wires without the R/R attached to the battery but should that make a difference?
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I think I've made some progress with the starting issues but I've still got electrical problems, I think.
Starting seemed to be a combination of bad fuel, bad fuelling and weak spark. New plugs and coils, draining the carbs and messing about with the idle adjustment got it started. And it seems to run OK, as it did when I first got it running. But it doesn't start easily, which is just weird because it fired up virtually first time when I first got it going.
The electrical problems are weird. First I thought I'd killed a brand new battery trying to turn it over without the plugs in. It's a tiny lithium one from Ultrabatt but is meant to be good for 300CCA. They have a discharge protection circuit so that must have kicked in as when the battery was off the bike it was still showing 12v+. 30mins on the charger and it was full. Maybe it needs more than 300CCA but the old engine ran OK off a 280CCA battery. Using the car battery 450CCA got the bike going but wombles knows why it needs so much power. Can't just be the cold weather can it?
While it was running I checked the stator output and across all three phases it was putting out about 60V AC at about 4k rpm. Checking the R/R output that was about 15v depending on revs. It's meant to be one specifically for lithium batteries and not meant to charge at more than 14.1v. I was measuring the output directly at the wires without the R/R attached to the battery but should that make a difference?
Sent from my Pixel 5 using Tapatalk