Todd, your CDI unit is only for the ignition system not for the charging system. If you were running at 20+ vdc, your new bulb will be blown already. If your CDI is bad, your engine won't run at all.
________________________________
From: "todd-martin@att.net" <todd-martin@att.net>
To: Honda-C70@yahoogroups.com
Sent: Tuesday, June 26, 2012 7:32 PM
Subject: [Honda-C70] 82' CDI Unit??
Hi there My first post after scouring the fourms for days. Learned a lot, replaced Headlamp and replaced the carburator.
I had a burntout headlamp and at that time I had no issues charging battery. The turn signals, brake lights, horn, and even the electric start worked well. Then I replaced the headlamp and the issues started.
I measured the DC voltage at the battery terminals and it was WAY high..20+VDC up to over 30VDC when i reved the motor.
1. battery no longer charged.
2. rectifier seemed to check ok
3. pulled the CDI unit, visual inspection, replaced.
4. signals and all other lights stopped working.
I could be wrong but I suspect the CDI unit.
QUESTIONS:
1. Does the CDI unit provide a Voltage Limiter function at all?
2. Has anyone else seen issues with a CDI unit?
3. is there a good way to test it (aside from replacing it)
Thanks For your support.
Todd
[Non-text portions of this message have been removed]
1970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw
1970-73 C70 Troubleshooting Guide:
http://tinyurl.com/6ebwtw (scroll to sec.7.1 page 101.jpg)
1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c
1980-81 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec.18-1 page 170.jpg)
1982-83 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec. 20-28 page 205.jpg)
1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn6
1982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c
More resources for C70 Passports and Cubs:
http://www.shlaes.com/Vehicles/Scooter.htm
http://www.velodrome.com/HondaC70/HondaC70.html
