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  #11  
Old 28th June 2021
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Alright, let me attempt to simplify how it is wired. The negative side of the coil is wired to the pink wire on the Dyna plug. The other pink wire that goes to the tach is wired to the green dedicated tach wire on the Dyna. Am I missing something?
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  #12  
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Quote:
Originally Posted by Mr.Rowdy View Post
Alright, let me attempt to simplify how it is wired. The negative side of the coil is wired to the pink wire on the Dyna plug. The other pink wire that goes to the tach is wired to the green dedicated tach wire on the Dyna. Am I missing something?
Is this a stock HD Tachometer for that era Sportster? Or something aftermarket? Or an HD non-stock Tach?

It sounds like you have the right wiring...

The Dyna PINK wire is triggering the COIL.

The Dyna GREEN wire should trigger the Tach.

You said you removed the Tach PINK wire off the coil, which previously went to the Tach - That would be correct.

The Dyna GREEN wire & the Tach PINK wire need to be connected together (it sounds like you did that). No other connection should be on that wire - not the coil - not anything. If that's the way you have it, the Tach should work correctly.


If, for some reason, the Dyna is not triggering the Tach, perhaps it is a bad module. In that case, you have to go back to the previous wiring - go back to NOT USING the GREEN wire and hook the Tach PINK wire back on the coil with the Dyna PINK wire.

You indicated that worked before, but was the wrong reading.

I'm not there - I'm only going by what you've posted.

Did you look at the document I linked? Is that the module you have? There are two wiring diagrams there - one for dual-fire mode and one for single-fire mode.

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  #13  
Old 28th June 2021
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I have it wired just like those directions. Although the directions that came with my module has switch #1 for the VOES, Switch #2 & #3for the curve selection and #4 & #5 for the rev limiter. I checked for a tach signal from the coil to the Dyna module and it is there but there is nothing coming from the green wire from the Dyna.
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Well - I don't have your module - Maybe post a picture of the front, back, sides - Anywhere there is text or numbers... It seems they made a bunch of different versions and the switch functions are not consistent...

If you have 5 switches and your instructions are for 5 switches, I would stick with those selections. It sounds like you don't have a choice of Single-Fire on that module.


Your description/wording is a little confusing because the Dyna PINK wire sends a trigger signal TO---> the coil. If you connect the Tach to the coil, that same Dyna PINK wire trigger signal is being sent TO---> the Tach... No signal goes back to the Dyna 2000 module on that wire.

Internally, the GREEN wire should also be pulsing at the same time that the PINK wire is sending it's trigger signal TO---> the coil, thereby, the GREEN wire should be triggering the Tach.

If that doesn't work - I can't explain why, other than the module being bad. It should work that way. If it doesn't, you have to connect the Tach to the coil trigger terminal.

BTW, are you using a VOES? And what setting is the Sw#1?


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  #15  
Old 28th June 2021
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Bottom line is that I am getting no signal from the green wire at all. I tested continuity and crank signal at the pink wire at the module plug and have it. But nothing at the green wire that goes to the tach. It's very simple. The pink wire from the coil goes to the plug for the module. Then I have the pink to the tach connected to the dedicated green wire from the module and have no tach. If I reconnect the pink from the tach to the coil I have tach signal but the rev limiter kicks in at 5500 rpms regardless of what gear I am in. Dyna says that the tach is just not reading properly. But how can I verify that and why isn't the green wire doin anything? I don't want to be leaving 1000 rpms and ten horsepower on the table just because we are guessing that the tach isn't reading properly.
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Reconnect the Tach back to the Coil...

Quote:
Originally Posted by Mr.Rowdy View Post
Dyna says that the tach is just not reading properly.
Did you ask Dynatek about the GREEN wire NOT PRODUCING a signal???


I did ask previously about your speed to RPMs... So let's make this simple.

Ride at exactly 3000 rpms in 5th gear... What speed is indicated on your speedometer?

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  #17  
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I told the Dyna tech guy but they haven't answered. Pretty much disregarded my question and said my tach is off, never answering about the green wire. I'll have to put the wiring back and go see what speed at 3000
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  #18  
Old 29th June 2021
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Okay. So after reconnecting the tach to the coil it works fine. I also changed the rev limiter to 6000 instead of 6500 and it made absolutely no difference, still hit the limiter at 5500 according to the tach. Speed at 3000 rpms in 5th is right at 65mph using a final drive combo of 23/48. I'm going to put the factory module in and see if something changes I guess.
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  #19  
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And it's still topping out around 5500 but it isn't like the limiter is kicking in because it is too subtle, it just goes soft and stops building rpms. I think my valves are floating or something wonky as hell is happening in the carburetor. I'm lost
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Quote:
Originally Posted by IXL2Relax View Post
Beyond the ignition module - There are other conditions that might limit your RPMs.

The carb bowl running out of fuel - Do you have a free flow of fuel from the petcock?

The Throttle Plate not fully opening - Remove air cleaner, look in throat, crank grip to WOT?

Failing Cam Position Sensor - Have you looked in the nosecone to see what condition the CPS is in? They can melt & cause failures due to heat, like a nosecone ignition module.

Failing Coil - Under some conditions, coils will fail due to heat causing the internal windings to gap open from expansion

A bad/loose ground (or positive) battery strap can be intermittent due to vibrations. Check the connections at each end of both cables. Also check for corroded or broken strands down in the cables themselves.
Have you checked any of these suggestions I made?


You can check for a lean condition (like partially closed throttle plate or wrong main jet) by seeing whether the bike will pick up power if you pull the enrichener part way out when the engine seems to hit the limit...


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