Picture Attachments Fixed? (18 Feb 2023)
Hopefully, the pictures uploads are fixed for the time being. Let me know if you continue to have issues. I am looking into a more permanent solution. Thanks for your patience. - Makotosun
Re:Re:HT1 No Spark Help
- oldyamahajas
-
Topic Author
- Offline
- New Member
-
- Posts: 3
- Likes received: 0
HT1 No Spark Help was created by oldyamahajas
I can't seem to find my original thread on this; but I'm slowly making some progress or at least ruling things out I guess.
My 70 HT1 has zero spark. Zilch. Nada. I've confirmed the coil and wire are good. I think that I should be getting some level of voltage from the black wire (as shown in the image below) as it comes straight from the magneto to the coil (is that correct??). There is zero voltage there, so I'm wondering if either I'm wrong with that assumption, OR the points, condenser, or magneto are bad?
Should I try and replace the condenser? Is it still available somewhere? Or should I just punt and try replacing the entire magneto (hoping to find one with a valid points and condenser?)
If I put a test light on say any of the wires on the light circuit (headlight, etc) I see power coming... just the starting magneto side is giving me a world of pain. I really do like this bike and would love to get it running.
This message has an attachment image.
Please log in or register to see it.
Please Log in or Create an account to join the conversation.
- MarkT
-
- Online
- Site Supporter
-
- Posts: 12356
- Likes received: 7878
Replied by MarkT on topic HT1 No Spark Help
Please Log in or Create an account to join the conversation.
- oldyamahajas
-
Topic Author
- Offline
- New Member
-
- Posts: 3
- Likes received: 0
Replied by oldyamahajas on topic HT1 No Spark Help
Please Log in or Create an account to join the conversation.
- MarkT
-
- Online
- Site Supporter
-
- Posts: 12356
- Likes received: 7878
Replied by MarkT on topic HT1 No Spark Help
Please Log in or Create an account to join the conversation.
- MarkT
-
- Online
- Site Supporter
-
- Posts: 12356
- Likes received: 7878
Replied by MarkT on topic HT1 No Spark Help
Points get an almost invisible coating on them when sitting sometimes. They can look clean but aren't.
Contact cleaner and pulling strips of white business card (uncoated paper) through the contacts until they come out clean should fix that. (open points, insert card strip, let points close, pull out strip)
Second most common problem is wire rubbed through insulation under flywheel.
Condenser would be my next guess.
Please Log in or Create an account to join the conversation.
- oldyamahajas
-
Topic Author
- Offline
- New Member
-
- Posts: 3
- Likes received: 0
Replied by oldyamahajas on topic HT1 No Spark Help
Please Log in or Create an account to join the conversation.
- MarkT
-
- Online
- Site Supporter
-
- Posts: 12356
- Likes received: 7878
Replied by MarkT on topic HT1 No Spark Help
Also curious how you know ignition coil is good?
Please Log in or Create an account to join the conversation.
- SuperKev
-
- Offline
- Junior Member
-
- Posts: 12
- Likes received: 5
Replied by SuperKev on topic HT1 No Spark Help
I’ve been rebuilding a 70 HT1 and I have a wicked spark, until I wire up the flasher unit and connect the ground,
Please Log in or Create an account to join the conversation.
- adguy2112
-
- Offline
- Site Supporter
-
- Posts: 481
- Likes received: 311
Replied by adguy2112 on topic HT1 No Spark Help
Please Log in or Create an account to join the conversation.
- Ht1kid
-
- Offline
- Site Supporter
-
- Posts: 933
- Likes received: 525
Replied by Ht1kid on topic HT1 No Spark Help
Please Log in or Create an account to join the conversation.