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any suggestions for an A65 replacement alternator #532508
03/12/14 11:04 am
03/12/14 11:04 am
Joined: Jan 2002
Posts: 1,198
hamden, ct.
hacksaw Offline OP
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hacksaw  Offline OP
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Posts: 1,198
hamden, ct.
seems like prices are all over the lot. 1965T. thanks.

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Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #532515
03/12/14 11:20 am
03/12/14 11:20 am
Joined: Sep 2002
Posts: 7,813
Seattle
Alex Offline

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Alex  Offline

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Joined: Sep 2002
Posts: 7,813
Seattle
I've got a good used 3-phase Lucas alternator in my Royal Star with a podtronics. After roasting one podtronics by mounting it under the seat, the new mounting location under the steering damper where the later zeners were has it charging at idle and keeps the halogen headlamp lit even in stop-and-go traffic. I'm loving this setup.


A smattering:
'53 Gold Flash
'67 Royal Star
'71 Rickman Metisse
'40 Silver Star
'37 Rudge Special
sixtyseventy Lightboltrocket road racer...and many more.
Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #532519
03/12/14 11:40 am
03/12/14 11:40 am
Joined: Jun 2002
Posts: 9,962
Scotland
S
Stuart Online content
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Stuart  Online Content
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S
Joined: Jun 2002
Posts: 9,962
Scotland
Hi,

What've you got and what do you want?

. If it's still got the 3-wire single-phase stator, Sparx do an encapsulated replacement.

. Above that, the 2-wire RM21 (10.5A @ 5,000 rpm) is available from LAP (Lucas Aftermarket Products), Sparx and Wassell have copies.

. Above that again, the high-output 3-wire 3-phase RM24 (14.5A @ 5,000 rpm) is available from LAP, Sparx has a copy, Wassell has an alleged 20A 2-wire, single-phase stator, but don't appear to mention the rpm where this wonderful 20A is generated (not a lot of use @ 10,000 rpm grin ).

Ime and mho, you can never have too many Amps.

Hth.

Regards,

Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #532523
03/12/14 11:52 am
03/12/14 11:52 am
Joined: Dec 2002
Posts: 3,252
arkansas
L
leon bee Offline
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leon bee  Offline
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L
Joined: Dec 2002
Posts: 3,252
arkansas
Hack for electrical stuff I like an eBay seller called racingnorton who is also a real guy named
Carl Hokanson. I don't think he tries to get rich off of us, email is chokanson at aol dot com. I'd check with him.

Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #532542
03/12/14 2:45 pm
03/12/14 2:45 pm
Joined: Dec 2002
Posts: 406
Chelmsford MA
M
MarcB Offline
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MarcB  Offline
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M
Joined: Dec 2002
Posts: 406
Chelmsford MA
I've use a Sparx 3-wire set-up for over 10 years (holy crap, even longer than that) and it's been very good, except they had issues with the rotor not fitting the shaft early on. Because of this, I use a Lucas rotor and it's been trouble-free the whole time.

I'll second the mention of Carl Hokanson. I've dealt with him in the past and he is very reliable.

Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #532627
03/12/14 11:57 pm
03/12/14 11:57 pm
Joined: Jan 2002
Posts: 1,198
hamden, ct.
hacksaw Offline OP
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hacksaw  Offline OP
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Joined: Jan 2002
Posts: 1,198
hamden, ct.
thanks everybody!
I haven't pulled it apart yet. its not charging so I just assumed its a bad alternator, but I realize It could be broken wires as well as anything else. i'll report back.

Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #532641
03/13/14 4:53 am
03/13/14 4:53 am
Joined: Jun 2002
Posts: 9,962
Scotland
S
Stuart Online content
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Stuart  Online Content
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S
Joined: Jun 2002
Posts: 9,962
Scotland
Hi,

Originally Posted By: hacksaw
its not charging so I just assumed its a bad alternator, but I realize It could be broken wires as well

Also don't forget the rectifier or rect./reg., it could've broken. frown

Hth.

Regards,

Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #532729
03/13/14 5:29 pm
03/13/14 5:29 pm
Joined: Oct 2008
Posts: 5,014
Gnashville
DavidP Offline

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DavidP  Offline

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Joined: Oct 2008
Posts: 5,014
Gnashville
The last time I had the original set up, I used to replace the rectifier every couple of years. Never fried a zener.

Recently found an RM24 on fleaBay, paired with a 200W rect/regulator from some Yamaha it works great.


Stepping on others doesn't make you stand tall.

71 A65L "Zelda"
92 BMW K100rs "Gustav"
72 T120V cafe project "Mr. Jim"
Re: any suggestions for an A65 replacement alternator [Re: Stuart] #532785
03/14/14 4:38 am
03/14/14 4:38 am
Joined: Aug 2011
Posts: 93
UK
T
TripleTown Offline
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TripleTown  Offline
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T
Joined: Aug 2011
Posts: 93
UK
Originally Posted By: Stuart
Hi,

What've you got and what do you want?

. If it's still got the 3-wire single-phase stator, Sparx do an encapsulated replacement.

. Above that, the 2-wire RM21 (10.5A @ 5,000 rpm) is available from LAP (Lucas Aftermarket Products), Sparx and Wassell have copies.

. Above that again, the high-output 3-wire 3-phase RM24 (14.5A @ 5,000 rpm) is available from LAP, Sparx has a copy, Wassell has an alleged 20A 2-wire, single-phase stator, but don't appear to mention the rpm where this wonderful 20A is generated (not a lot of use @ 10,000 rpm grin ).

Ime and mho, you can never have too many Amps.

Hth.

Regards,


+1, regarding what do you want? It's a preference thing and probably best to get some independent advice.
LAP, Sparx and Wassell all make 3-wire 3 phase 12V RM24 LU47244 (14.5A) stator, while LAP and Wassell also make a lower output (10.5A) RM24 LU47252 3 phase unit.
All available in the US.

100% need to check the rectifier/regulator. Can't go wrong with Podtronics which are readily available.

Good luck!

Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #534318
03/22/14 11:38 pm
03/22/14 11:38 pm
Joined: Jan 2002
Posts: 1,198
hamden, ct.
hacksaw Offline OP
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hacksaw  Offline OP
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Joined: Jan 2002
Posts: 1,198
hamden, ct.
well I finally pulled the primary cover.
I find I have a 2 wire system.
the Lucas rotor doesn't wobble, but it has maybe an inch in rotational play.
the alternator looks old, but intact. the encapsulating material is pock marked and a bit weird looking, but seems intact.
except where there is a plastic housing for the wires, it is broken away where the wires actually enter the alternator. the wires themselves dont appear to be damaged.
on the other end, one of the spade connectors to the rectifier may have been loose.

part of me just wants to replace the whole shebang. part of me wants to diagnose the the problem if possible.

I believe I tested the output at those spade connectors a couple of years ago while the bike was still set up to run. there was no output.

can I check to see if there is a break in the alternator windings itself?
do rotors lose magnetism in time and should it have that 1 inch play?
how can a rectifier be checked with a meter?

thanks men. or mates, if that's the case!!!!!

Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #534373
03/23/14 10:27 am
03/23/14 10:27 am
Joined: Aug 2001
Posts: 4,308
Santa Barbara, California
KC in S.B. Offline

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KC in S.B.  Offline

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Posts: 4,308
Santa Barbara, California
Since you've been messing with these old bikes a long time, I know you plan to replace the rotor at a minimum. You would likely be able to see if the looseness is rotor/crank or rotor/hub while still on the motor. Hopefully it is the rotor itself, most likely IMO anyway. Fixing a crank keyway is almost too much trouble to bother with............ unless you live where those guys cast their new pistons before breakfast!!


Down to 1 BSA, 2 Triumphs, 1 '56 Chevy
Oops,.. add 1 Sporty
Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #534437
03/23/14 5:44 pm
03/23/14 5:44 pm
Joined: Jan 2002
Posts: 1,198
hamden, ct.
hacksaw Offline OP
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hacksaw  Offline OP
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Joined: Jan 2002
Posts: 1,198
hamden, ct.
well.......my ohm meter battery died. so I decided to just go ahead and pull everything.
the stator turned out to be a mess. the rotor beat it up.
the keyway might be ok. I cant get the rotor off as it seems whatever bushing they sleeve the insides of the rotor with, has now worn a groove behind the keyway.
HOW IN HELL DO I GET THIS THING OFF?

Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #534524
03/24/14 12:47 am
03/24/14 12:47 am
Joined: Jan 2002
Posts: 1,198
hamden, ct.
hacksaw Offline OP
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hacksaw  Offline OP
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Joined: Jan 2002
Posts: 1,198
hamden, ct.
nick, it looks like the woodruff key is still in the keyway, so I am a bit leery of pulling the rotor off with a puller. although maybe that's exactly what I need to do.

what would one cut the rotor with if I go that route? a cut off wheel? u think I could cut it enuff to split it with a chisel?

Re: any suggestions for an A65 replacement alternator [Re: NickL] #534747
03/25/14 6:02 am
03/25/14 6:02 am
Joined: May 2004
Posts: 3,743
Sydney Australia
B
BSA_WM20 Offline
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B
Joined: May 2004
Posts: 3,743
Sydney Australia
A puller and a lot of heat

Or as had alread been suggested split the arbour.
A big nut spliter will do the job


Bike Beesa
Trevor
Re: any suggestions for an A65 replacement alternator [Re: hacksaw] #534756
03/25/14 9:07 am
03/25/14 9:07 am
Joined: Aug 2012
Posts: 704
West Virginia, United States
Beach Offline

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Beach  Offline

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Joined: Aug 2012
Posts: 704
West Virginia, United States
This is what I replaced mine with and now I have a dependable charging system and nice headlight..A bit pricey but genuine Lucas rotor and welded stator...A lot to be said for a 3 phase charging system..

http://www.ebay.com/itm/Lucas-stator-kit...e01&vxp=mtr

Last edited by Beach; 03/25/14 3:42 pm.

Bill
1974 Norton Commando
1966 Lightning
1965 Lightning Rocket
1966 Norton Atlas
1967 Norton Atlas
1948 Panhead

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