I'm having troubles diagnosing the poor idling/knocking on one of my two CM400A's.
I drove this in high school and it hadn't run in years until I got it running 3 years ago, that's when it started doing it. I only got to drive it 10 minutes and the stator went. After spending days chasing a no spark issue, I recently found another bike to diagnose with.
If something's causing it to destroy stators, I want to find it before I find myself hunting for another hard to find stator.
Also did;
If you have a some time, please listen to it run and tell me what you think. It idles fine and slowly goes into a poor idles condition then knocks like it's in the head and then idles fine again. It's almost like a correction.
Long Knocking Video:
https://youtu.be/uXkqotcmVfg
At :40 – Just about knocked, expected it to knock.
Knocking:
1:12
2:44
3:37
3:54
3:59
4:05
6:31
6:51
Messing with wire, idle speed up at 5:11 and 5:24. Haven’t determined if this is related.
Short Knocking Video:
https://youtu.be/CVxkZf3lJR8
Knock :32
Revving
You’ll notice that revving off of idle shows kind of partial knocking or initial knock, but not a full knock.
Any advice would be helpful.
Thanks
I drove this in high school and it hadn't run in years until I got it running 3 years ago, that's when it started doing it. I only got to drive it 10 minutes and the stator went. After spending days chasing a no spark issue, I recently found another bike to diagnose with.
If something's causing it to destroy stators, I want to find it before I find myself hunting for another hard to find stator.
Also did;
- New Battery.
- New carb kits.
- New spark plugs.
- New spark plug wire boots.
- Fresh non-oxy fuel.
- Checked the valves and they are at .003 and .005
- Tightened the timing chain.
If you have a some time, please listen to it run and tell me what you think. It idles fine and slowly goes into a poor idles condition then knocks like it's in the head and then idles fine again. It's almost like a correction.
Long Knocking Video:
https://youtu.be/uXkqotcmVfg
At :40 – Just about knocked, expected it to knock.
Knocking:
1:12
2:44
3:37
3:54
3:59
4:05
6:31
6:51
Messing with wire, idle speed up at 5:11 and 5:24. Haven’t determined if this is related.
Short Knocking Video:
https://youtu.be/CVxkZf3lJR8
Knock :32
Revving
You’ll notice that revving off of idle shows kind of partial knocking or initial knock, but not a full knock.
Any advice would be helpful.
Thanks