- Joined
- Mar 17, 2018
- Messages
- 10
![United-States Country flag](https://www.accessnorton.com/images/flags/shiny/32/United-States.png)
just wondering where to go now for NEW alternator: Robert TN 73 850 commando
Andover Norton, Morrie’s Place, Baxter Cycle, Colorado Norton Works (CNW) and New York City Norton among others. I’ve been buying from Greg Marsh at Marsh Enterprises for awhile now and his prices are the best out there. Good luck.just wondering where to go now for NEW alternator: Robert TN 73 850 commando
Are you looking for a stator, rotor or both?just wondering where to go now for NEW alternator: Robert TN 73 850 commando
I have 50 year old stators and rotors that work fine. Before wasting money, check with it running at 3000 rpm. If it is not charging, disconnect the three stator and connect your meter to any two leads with your meter set on AC volts. Start the bike and see what it says at 3000 RPM. Then choose another pair and do the same, then choose the final paid and check one last time. This will be much easier with ananalog rather than digital meter. You should see around 30 volts on each pair. If you do, there's nothing wrong with your rotor or stator. The likely causes, in order:Just went out yesterday, and prior to leaving checked the status of the battery, multimeter showed 12.35v. I was shocked. Took it out about 3 weeks earlier and registered 12.86v according to records. Took it out anyway and came back 2 hrs plus later after a few stops. Checked again 12.20v Brought it back up with a Ctek charger the next morning 12.96V. I assumed that the Motobatt , 1 year old battery was still good and took the charge. Stator/alt. is over 17 years old. Should have put a multimeter on it immediately and revved the engine to see if I got between 13.5 and 15v, but I didn't. Just guessing that is the issue, maybe rotor too??? My current stator is a 3 wire Sparx unit. I see many of the new units out there are 2 wire units, can I use one of those by joining 2 wires into one? Thanks Robert TN
why the 10.5 stator instead of the 14.5 stator?I have 50 year old stators and rotors that work fine. Before wasting money, check with it running at 3000 rpm. If it is not charging, disconnect the three stator and connect your meter to any two leads with your meter set on AC volts. Start the bike and see what it says at 3000 RPM. Then choose another pair and do the same, then choose the final paid and check one last time. This will be much easier with ananalog rather than digital meter. You should see around 30 volts on each pair. If you do, there's nothing wrong with your rotor or stator. The likely causes, in order:
1) bad connection(s) from the Sparx
2) bad connection(s) to the Sparx
3) bad Sparx
4) bad capacitor if installed - you can simply remove it.
5) bad battery (unlikely since your charger works)
No don't connect stator wires together. If you need a new stator, 3-wire and 2-wire cost about the same and since you have a 3-wire regulator, get 3-wire. Unless you can define a need, get a Lucas 10.5 amp three-wire, not a Lucas 14.5 amp 3-wire.
When the bikes were built, 2-wire 10amp was plenty. Unless you've added more power consumers, 10 amps is still plenty. Anything you don't use is thrown away as heat. 2-wire (single phase) is also plenty, but 3-wire (three phase) does provide more power at lower RPMs than 2-wire. So, if you have a modern regulator that can use 3-wire, then I recommend using 3-wire. If you have LEDs for some of your lighting, then 10 amps is overkill!why the 10.5 stator instead of the 14.5 stator?
Except that the chain might fling residual oil all over the place it's fine to run for a while with the cover off.just posted a reply, maybe didn't go through. Just wondering while I perform these tests (already have primary cover off and oil drained) can I run these short tests with cover off, and no oil or do I have to re attach and fill oil level back up???? Thank you
Or just put the cover on loosely without filling wit oil, a much cleaner resultExcept that the chain might fling residual oil all over the place it's fine to run for a while with the cover off.