Hanging idle after load - 1973 CB450

[EzPete]

Okay, adjusted cam again, set valves and ran the bike before messing with points to see if the noise dropped. Definitely sounds better. Not sure how I messed that up last time, but anyways thanks for the callout there.

Now I am rewriting for mech points and advancer. Just noticed they never removed the condensers… the solid state of the pamco should not need those. I read somewhere that this can mess with the circuit board and cause misfiring. Curious if this is an additional issue or related to the hanging idle. Going to continue with the switch to points.

Certainly could have led to the problem, at the very least it wasn't helping prevent it.

 

[ancientdad]

Okay, adjusted cam again, set valves and ran the bike before messing with points to see if the noise dropped. Definitely sounds better. Not sure how I messed that up last time, but anyways thanks for the callout there.

Now I am rewriting for mech points and advancer. Just noticed they never removed the condensers… the solid state of the pamco should not need those. I read somewhere that this can mess with the circuit board and cause misfiring. Curious if this is an additional issue or related to the hanging idle. Going to continue with the switch to points.

Not something I've ever been involved with, but if the condensers were still connected to the Pamco circuit you could just try disconnecting them first to see how it runs.

 

[RobMan]

Test the condensers if you do decide to continue going back to points. I had two old sets of condensers and after testing found 3 were bad and only 1 appeared to be good. Bought new ones from 4into1 I believe.

 

[bh450]

Removed condensers and ran the pamco again. No dice. Could not align timing between the two cylinders. Decided to go back to mech points.

When I put the points plate on, it won’t fully seat. There is a gap. Is the advancer misaligned? Or is this gap fine?

Noted on Condensers, will check those next.

 

[ancientdad]

The high part of the points cam is trying to open both sets of points, which is putting downward pressure on the plate which keeps you from just setting the plate in there. Push upward on the plate as you push down, it should drop into the recessed areas top and bottom of the points base.

 

[bh450]

The high part of the points cam is trying to open both sets of points, which is putting downward pressure on the plate which keeps you from just setting the plate in there. Push upward on the plate as you push down, it should drop into the recessed areas top and bottom of the points base.

Ah yea should have known. maybe a bit hot here to be doing this today. Thanks gonna keep going forward.

 

[ancientdad]

And remember, you have to start from the beginning with points gaps and timing. Highly unlikely that the gaps on the points will be right as it sits.

 

[bh450]

Test the condensers if you do decide to continue going back to points. I had two old sets of condensers and after testing found 3 were bad and only 1 appeared to be good. Bought new ones from 4into1 I believe.

All four condensers I have are shot…looks like i’m finishing this another day. Thanks for catching that.