Re: Honda XL 350 1978 Project. Headlamp trilogy.
Posted: Sun Apr 15, 2018 11:42 am
Ill jot this down before I forget, I'll get some pics up later.
I fitted the new headlamp, tried the LED bulbs on AC and they blew. This is getting expensive.
After advice sought here, I stripped out the generator, and disconnected the earth of the lighting coil. I left the ignition coil earth intact retaining AC ignition.
I joined onto the earth with a silicone wire, sleeved it with shrink sleeve, and carefully led it up in a position it wouldn't abrade itself or anything else. I had to drill the oil seal for my fifth wire, and remake the loom finishing it off with a six pin waterproof automotive connector.
I wired in a 15 amp 1000v bridge rectifier. It gave over 50v DC, rising with RPM to over 68v DC. The LED bulb has a range of 8v to 80v so I could have used that, but I want to be able to replkace a dead LED bulb with an ordinary bulb if needs be.
I had a Cub regulater, short type, someone said short type was 6v? Anyhow, I wired it in and it gave a steady 14v. Great? No. It fell off to 1-2v when the lights were on, and the headlight bulb barely glowed.
I then wired in the reg/rec as recommended by LL81. It's 12v. As the bike is fundamentally a 6v bike, I wasn't sure what result I would get. I also wired in parallel a 40v 4700uf capacitor LL81 gave me some years ago.
The result is 14.2v steady, and lights (12v bulb) as bright as I could wish for! About to try the LED bulb now, then to find somewhere to locate the Reg/Rec (It's big!) and tidy up the wiring.
Then I have a leaking fork seal to replace. (Deep joy. )
The Reg Rec that works. https://www.ebay.co.uk/itm/Universal-4- ... 2749.l2649
I fitted the new headlamp, tried the LED bulbs on AC and they blew. This is getting expensive.
After advice sought here, I stripped out the generator, and disconnected the earth of the lighting coil. I left the ignition coil earth intact retaining AC ignition.
I joined onto the earth with a silicone wire, sleeved it with shrink sleeve, and carefully led it up in a position it wouldn't abrade itself or anything else. I had to drill the oil seal for my fifth wire, and remake the loom finishing it off with a six pin waterproof automotive connector.
I wired in a 15 amp 1000v bridge rectifier. It gave over 50v DC, rising with RPM to over 68v DC. The LED bulb has a range of 8v to 80v so I could have used that, but I want to be able to replkace a dead LED bulb with an ordinary bulb if needs be.
I had a Cub regulater, short type, someone said short type was 6v? Anyhow, I wired it in and it gave a steady 14v. Great? No. It fell off to 1-2v when the lights were on, and the headlight bulb barely glowed.
I then wired in the reg/rec as recommended by LL81. It's 12v. As the bike is fundamentally a 6v bike, I wasn't sure what result I would get. I also wired in parallel a 40v 4700uf capacitor LL81 gave me some years ago.
The result is 14.2v steady, and lights (12v bulb) as bright as I could wish for! About to try the LED bulb now, then to find somewhere to locate the Reg/Rec (It's big!) and tidy up the wiring.
Then I have a leaking fork seal to replace. (Deep joy. )
The Reg Rec that works. https://www.ebay.co.uk/itm/Universal-4- ... 2749.l2649