Searching for 1963 C105 55cc wiring diagram

slarsonroy · Post by **slarsonroy** » Tue Aug 30, 2016 5:24 am

revlover wrote:Yes..test it like any other diode. Best way is to use a battery and a test light. It should permit current flow in only one direction, kinda like a check valve. If it's bad. you can simply replace it with a single silicon diode like 3 amps or so.

It's open both directions. Is it a Zener diode like on the British bikes that dumps everything over 6 volts to ground?

jensey · Post by **jensey** » Tue Aug 30, 2016 2:57 pm

No, just a diode, so it's toast.

Rizingson · Post by **Rizingson** » Tue Aug 30, 2016 5:13 pm

The C105 will run without a battery. The rectifier is used only to charge the battery, in fact the lighting is AC except for the brake light.

slarsonroy · Post by **slarsonroy** » Wed Aug 31, 2016 9:51 am

Rizingson wrote:The C105 will run without a battery. The rectifier is used only to charge the battery, in fact the lighting is AC except for the brake light.

Thanks for that info. I have no spark, so I guess I need to look at my ignition circuit also.

Rizingson · Post by **Rizingson** » Wed Aug 31, 2016 6:16 pm

Have you pulled the flywheel and checked/cleaned the points? Also clean any rust from the inside of the flywheel. The coil on the left or closer to the rear is the primary coil, the other coil is the lighting coil.

rrietman · Post by **rrietman** » Wed Aug 31, 2016 8:39 pm

open the points a bit. doesn't hurt to clean things up a bit as well.
good luck
Randy

slarsonroy · Post by **slarsonroy** » Sun Sep 04, 2016 12:37 pm

Rizingson wrote:Have you pulled the flywheel and checked/cleaned the points? Also clean any rust from the inside of the flywheel. The coil on the left or closer to the rear is the primary coil, the other coil is the lighting coil.

No I havent. I was looking for 6v at the points and trying to trace wires. No wonder I couldn't find it there. Thanks for that info.