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Posted by bikerbob5864
 - December 08, 2018, 12:11:46 PM

I'm checking units advertised on E-Bay. I've got two that came off a 99 Drifter with different numbers(#1  21175-1066, #2 21175-1064) and one that came off a 01 Nomad(21175-1066) Now this shows me that there indeed may be a part # difference......but they are interchangeable. I'm aware of the possible tuning differences, but I think they would be negligible. I'll investigate further.

Posted by Bucko
 - December 07, 2018, 23:09:55 PM

Weird.  I just checked the numbers for an 01 Drifter vs 01 Nomad and they're different: 21175-1064 for the Drifter vs 21175-1066 for the Nomad.  Partzilla shows the same difference  in numbers from a 99 Drifter to a 02 Nomad.  Where are you checking your numbers?

Posted by bikerbob5864
 - December 07, 2018, 22:18:15 PM

I've checked actual part numbers on two ECM's, 1 from a 99 Drifter was the same as one from a '02 Nomad. Tomorrow I will check the numbers on my ECM in the bike and compare all together. I think they will interchange with no issues.

Posted by Bucko
 - December 07, 2018, 16:01:47 PM
Quote from: OR Seedman on December 07, 2018, 06:50:26 AM

part numbers are the same for both bike units...so they should be interchangeable......

Are you sure they're the same?  Seems to me the Drifter and Nomads had different 'tuning' -  I suspect the ECU's are different.  You need to look at the full part number, not just the drawing reference number on the parts fiches.

Having said that, they might still interchange with some minor (maybe) performance issues though - you'd want to make sure the pin out is exactly the same though before trying otherwise you risk frying the ECU or something that's plugged into it.  ECU pinouts are in the service manuals (I think).

Posted by OR Seedman
 - December 07, 2018, 06:50:26 AM

part numbers are the same for both bike units...so they should be interchangeable......

Posted by bikerbob5864
 - December 07, 2018, 00:21:16 AM

What would be the differences between a 01-05 Drifter 1500 ECM and a 1500 Nomad 01-05. I've seen both and the connections look to be the same and both are the same engine. Reason I'm asking is that I can get a used  ECM, which I need, from a Nomad for $179.00 vs. a new one from Parzilla for $515.00

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