NC Auto Advance part numbers inquiry
Posted: Thu May 30, 2019 3:34 pm
Good morning, i'm still chasing problems with my nc 250 scrambler.(66/67) and need a little help. I'm trying to verify that I have the correct auto advance for a battery free ignition setup. I believe this was stock with the lower output alternator setup on 250 scramblers. Does anyone know how to verify the different advance units by part numbers for narrow case scramblers? I searched the web for parts manuals but I could only find the wide case parts manuals. They show a single part number for the aau.
Some history:
When I brought the bike home it had an ignition coil suited for a battery ignition installed. I believe it measured 400ohms. I found out that the ig. stator coil was shorted and guessed that the previous owner had converted it to a battery type ignition. Now i'm wondering if he changed the auto advance as well. If I could find the two part numbers for the NC Scrambler AAU's I could verify which one I have.
The symptoms:
The bike starts well and runs but as soon as you get past 1/4 throttle it will bog down and eventually die. This was more pronounced when the previous ignition coil was in place.
What i've done:
Rewired the ignition stator coil and measured its resistance. Matched it to a ET/Magneto type ignition coilhttp://guzzino.com/igco6va.html
Fitted a sized mikuni vm from Sudco
Timed and set the points and spark plug
Some history:
When I brought the bike home it had an ignition coil suited for a battery ignition installed. I believe it measured 400ohms. I found out that the ig. stator coil was shorted and guessed that the previous owner had converted it to a battery type ignition. Now i'm wondering if he changed the auto advance as well. If I could find the two part numbers for the NC Scrambler AAU's I could verify which one I have.
The symptoms:
The bike starts well and runs but as soon as you get past 1/4 throttle it will bog down and eventually die. This was more pronounced when the previous ignition coil was in place.
What i've done:
Rewired the ignition stator coil and measured its resistance. Matched it to a ET/Magneto type ignition coilhttp://guzzino.com/igco6va.html
Fitted a sized mikuni vm from Sudco
Timed and set the points and spark plug