The BSA A7-A10 Forum

Technical => Lucas, Electrical, Ignition => Topic started by: pato08 on 31.12. 2018 00:02

Title: Lucas Magneto & Dynamo
Post by: pato08 on 31.12. 2018 00:02
After several years of storage, it's time to commence the build of my 1957 Plunger, my first question is are the magneto & dynamo I bought with my basket case the right ones ?
Title: Re: Lucas Magneto & Dynamo
Post by: Beeza on 31.12. 2018 02:57
Love the bottom sticker in the first photo.
K2F should be OK, dynamo should be E3L. AC-0
Title: Re: Lucas Magneto & Dynamo
Post by: muskrat on 31.12. 2018 05:02
G'day Pato
About bloody time. LOL.
Dyno should be a E3L Clockwise (looking at the drive sprocket) tapper drive.
Mag K2F tapper drive Anti clockwise at the drive end.
Cheers
PS: see you at Goulburn?
Title: Re: Lucas Magneto & Dynamo
Post by: beezermacc on 31.12. 2018 12:45
The magneto looks correct. The dynamo should be E3L (I know others have already said this). From the position you have taken photos I can't be sure if yours is 'Long' (E3L) or 'Short' (E3H). It looks like the short type because the end cover has the oil hole window. The obvious difference is.... does it have one screw or two to hold the pole shoe in place? These are the big countersunk screws which you can see in the main part of the body. You need the two-screw type.
Title: Re: Lucas Magneto & Dynamo
Post by: Triton Thrasher on 31.12. 2018 14:15
G'day Pato
About bloody time. LOL.
Dyno should be a E3L Clockwise (looking at the drive sprocket) tapper drive.
Mag K2F tapper drive Anti clockwise at the drive end.
Cheers
PS: see you at Goulburn?

I was baffled there.  “Taper!”
Title: Re: Lucas Magneto & Dynamo
Post by: JulianS on 31.12. 2018 14:17
The label on the mag gives it original specification and fitment (providing someone has not changed the label)

BSA fitment mag bodies came with a machined edge to ensure clearance between mag and crankcase. If you mag does not have the machined edge check that it fits OK, if not mag will not seat properly against the joint face.
Title: Re: Lucas Magneto & Dynamo
Post by: beezermacc on 31.12. 2018 17:41
G'day Pato
About bloody time. LOL.
Dyno should be a E3L Clockwise (looking at the drive sprocket) tapper drive.
Mag K2F tapper drive Anti clockwise at the drive end.
Cheers
PS: see you at Goulburn?

I was baffled there.  “Taper!”

Actually the dynamo is anti clockwise drive. If the arrow points the wrong way it doesn't really matter because the dynamo can be wired to run either way.
Title: Re: Lucas Magneto & Dynamo
Post by: pato08 on 01.01. 2019 01:55
Had a dig around in the parts box and found this, It will need a new end cover ? Is this the one I need to refurb.
Title: Re: Lucas Magneto & Dynamo
Post by: beezermacc on 01.01. 2019 12:12
That's the one! Correct sprocket, fitment etc. Looks like it's worth testing before spending any money on it. New bearings always a good idea though.
Title: Re: Lucas Magneto & Dynamo
Post by: trevinoz on 01.01. 2019 20:13
That's the late model, it takes a pressed metal end cover rather than the Bakelite one.
Title: Re: Lucas Magneto & Dynamo
Post by: pato08 on 01.01. 2019 20:53
That's the one! Correct sprocket, fitment etc. Looks like it's worth testing before spending any money on it. New bearings always a good idea though.
Thanks beezermacc, I intend to have it over hauled at T.T.Enterprises, or Peter Scott motorcycles here in OZ.
thank for you info.
Title: Re: Lucas Magneto & Dynamo
Post by: pato08 on 02.01. 2019 03:05
The label on the mag gives it original specification and fitment (providing someone has not changed the label)

BSA fitment mag bodies came with a machined edge to ensure clearance between mag and crankcase. If you mag does not have the machined edge check that it fits OK, if not mag will not seat properly against the joint face.
Had a look at mine and it does have the machined edge thanks for the info.