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noise, ping, rod knock, sportster

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  #21  
Old 25th May 2018
BradX13 BradX13 is offline
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Quote:
Originally Posted by IXL2Relax View Post
I did not hear anything unusual there...

Is the ping still there?

Points (mechanical or magnetic) with mechanical advance will function - The right engine control module with VOES is capable of running a more specific curve to match your engine & alter the curve for the engine load while riding...

I'm still interested to know what control module you have under the triangle cover (next to the battery)???

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It seems the noise is still there. I have a SE 8000rpm rev 9325 module.
First part of video is at idle. Second is light acceleration in 2nd gear and third is decel in second gear
https://youtu.be/4khVBZ53418
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  #22  
Old 26th May 2018
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if the noise is there on decel, it is mechanical. if it is on one cyl. take off the rocker cover and check valve action and clearance. could be a worn rocker shaft. they say hd lifters do not oil well and maybe it could be a root cause.
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  #23  
Old 26th May 2018
BradX13 BradX13 is offline
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The noise is NOT there on decel. It's only there on acceleration and slightly audible on idle. My next step is to check the lifters and pushrod. I'll look at the rockets too
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  #24  
Old 26th May 2018
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Although pre-detonation pings can be caused by carbon build-up or low octane fuel, the most common cause is timing advancing too much/too soon.

I had an issue with the MAP sensor output on my 02 1200 Sport and no amount of octane booster helped.

However, timing advance ping is more likely at lower RPMs and under load accelerating.

I listened to the video but no conclusion.
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  #25  
Old 27th May 2018
BradX13 BradX13 is offline
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My next step is to retard the timing and if that doesn't work then I'll just have to rebuild the top end. Hopefully it works but Idk how my timing could have slipped
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  #26  
Old 27th May 2018
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Quote:
Originally Posted by BradX13 View Post
The bike was passed down to me 3 years ago when my father passed. <SNIP> It started after I moved back to New Hampshire. <SNIP> It normally only starts happening when it's warmed up.
Quote:
Originally Posted by BradX13 View Post
Also nothing on the bike has changed since I got it other than plugs. Never had the issue before this season. I moved back up here from SC but the bike was tuned in NH.
So, it didn't have the problem noise in South Carolina...

1) Did you notice the problem in New Hampshire and then try tuning it up... -or-
2) Did you tune it because you moved to NH - and then you noticed the noise?

Quote:
Originally Posted by BradX13 View Post
I have a SE 8000rpm rev 9325 module.
There should be other numbers on the side of the module (near the cable)-
3) What are the other numbers on the ignition module?

4) Do you have a mechanical advance unit behind that ignition pickup unit in the nosecone?
--- (you can tell it does if the rotor in the nosecone actually moves CCW as in the instructions)

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  #27  
Old 27th May 2018
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Let me clarify. The noise was not present before I moved down to SC. It was not present while I was living there either. But once I moved back up to NH it became prevalent. My nosecone spins CCW. I did the tuneup because it was due. Noise was there before tuneup. I will have to wait till I'm put of work for the other numbers on the module. Thank you for all the suggestions
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  #28  
Old 27th May 2018
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Quote:
Originally Posted by BradX13 View Post
But once I moved back up to NH it became prevalent. My nosecone spins CCW. I did the tuneup because it was due. Noise was there before tuneup.
OK

Quote:
Originally Posted by BradX13 View Post
My nosecone spins CCW.


I want to make sure you understood my question --- If there is a mechanical advance in the nosecone (under the pickup unit), you will be able to slightly rotate the center shaft that normally spins around (in the center of the pickup unit)... You will be able to rotate that shaft slightly CCW while the engine is stopped... This indicates there is a mechanical advance behind the pickup, because when the advance unit spins (with the engine running), it slightly rotates that shaft to mechanically advance the spark timing...

I'm trying to find out if you HAVE A MECHAINCAL ADVANCE in there....

Your answer was not specific enough for me to tell...

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  #29  
Old 27th May 2018
BradX13 BradX13 is offline
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Quote:
Originally Posted by IXL2Relax View Post
OK





I want to make sure you understood my question --- If there is a mechanical advance in the nosecone (under the pickup unit), you will be able to slightly rotate the center shaft that normally spins around (in the center of the pickup unit)... You will be able to rotate that shaft slightly CCW while the engine is stopped... This indicates there is a mechanical advance behind the pickup, because when the advance unit spins (with the engine running), it slightly rotates that shaft to mechanically advance the spark timing...

I'm trying to find out if you HAVE A MECHAINCAL ADVANCE in there....

Your answer was not specific enough for me to tell...

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Sorry yes I can move it slightly when it's not running. The module number is mostly wiped off but what I could see is 420-94
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  #30  
Old 28th May 2018
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OK - If you have a mechanical advance _AND_ an electronic control module, they are compounding the advance... If you are right about having a mechanical advance, then we have a mish-mash system here---

PLEASE - Remove the pickup unit in the nosecone and

1) take a picture of what you have behind that...

2) Take a picture of the pickup unit, front & back...

3) Take a picture of the Ignition Control Module (ICM)...

I think I know what all you have there, but some pictures would certainly help verify...

No where did you answer the question about having or not having a VOES? It normally attacheds behind the keyswitch (on a '94) between the cylinders - It has a vacuum hose to it from the carb and it has a wire that goes to the ICM...

4) Do you have a VOES?

It appears your ICM is a 32420-94 SE module (K-curve) - That has two built-in timing curves that can be selectively switched back and forth based on the activation of the VOES - Vacuum Operated Electric Switch...

If you have a mechanical advance unit as well - those two are combining to create crazy curves...


Please provide the pictures and explain if you have a functioning VOES...

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Last edited by IXL2Relax; 28th May 2018 at 04:50..
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