Dear Gents
Have strange termical problem on my full rebuildt KZ650 - 1978.
What happens (sorry for need to go a little further):
Before 2 weeks i have changed oil + filter. After i have done a short testride. Noted strange popping exhaust and after 10km the bike went suddenly out.No way to bring her alive again. After pulling the bike home i was able to start her again. However, start investigation: Intake manifolds damaged, changed to new one, complete carb supersonic cleaning, checked ignition (Accent German one) and detected, that one capacitor is bent/damaged (maybe during using wrench to crank over). Thought this is the problem and send that ignition for testing to manufacturer who has done a great job and repaired that thing for free. Put all together and thought i have found that problem.
Next testride: She runs very nice, no popping anymore. Good power. But after 10km again she went out suddenly. Same probelm, no possibility to start her again. Pulled home and there she starts again.
Now i started again investigation and took a deeper look on coils (green Dyna) and voltage regulator (new Shindengen SH847AA for LiPo Battery).
Before i had the regulator placed above engine so this part received full heat. I moved the regulator on the front frame triangle (below frok tree). So now full in Airflow.
After i measured resistance of the coils.
High voltage output have strange high resistance of 19.98Ohm. Coils heated up with airgun at 120 degree resistanvce changed to 21 ohm. Even noticed that HV Connector on Cylinder 2 is black/burned. See picture. So for me this coils are both damaged.
Now my questions to you:
- Have ordered new coils form Dynatek. Now the black one with 5 Ohm because they mention that black is better for street use. Am i right?
- Also orderes new HV Cables from Dyna - with cooper core (not graphite which i had used before). Better?
- Setup of Coils: I have seen that sometimes a additional resistor is mentioned between Coils and Ignition. I do not have something like that. Important?
- Additonal information: Complete wires are new. I use Motogadget Blue Unit.
- What do you think why HV Cable 2 is burned and what could be the reason why coils are damaged?
- Any ideas left what i should check additional or simply put in new coils and test?
Many thanks for your help in advance!
Cheers Chris