1967 Suzuki b100p/b105p - Lights on when not running

[robster94gt]

Hey all,
I don't have any experience with bikes but i just finished putting together a Suzuki b100p.

I was wondering if the headlight and tail light should be on if the key is switched on, but the engine is not running. I haven't tried to run the engine yet, but just wanted to check if there are any electrical issues.
Currently, when I've got the key switched on, i can get the brake light to come on when i press the foot brake, but the tailight and headlight are not working. I'm not sure if they should be on, or only work when engine is running.

Thanks for your help,
Rob

[jaffa90]

Sounds normal to me for an old bike.
The rest should follow when the engine runs.

[kingsblue]

On the old 6 volt bikes the engine usually needs to be running for the headlight and tail light to work as these work off the magneto.

[robster94gt]

Thanks guys That's good to know.
Cheers,
Rob

[Pete.]

Yep normal. Lighting power (and ignition power in most cases) is not dependant on the battery. Many of that era of small bikes didn't even require a working battery to run. The only thing the ignition key did to prevent the spark plug from sparking was to earth the points and kill the spark, hence why they were so easy to steal, they just pulled the plug off the ignition switch and kicked it into life.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Easy-X]

[Jimmyjam]

I am new to this forum , I just picked up a barn find 105bp
Bike is complete 600 miles in pretty good shape, anyone know where I can find a service manual?
Also need help locating a few minor parts
Any help appreciated
Thanks
____________________
Jimmy j

[Nobby the Bastard]

[Jimmyjam]

If u weren’t such a smart a. I would have been happy to show you pictures
Everybody on here like you?
____________________
Jimmy j

[A100man]

[Jimmyjam]

Unfortunate, was hoping to find some help
____________________
Jimmy j

[Easy-X]

Most of the ppl on here hail from the Celtic nations where modesty and discretion are highly regarded. Willy waving your 600 mile barn find will not gain you any friends neither will thread-hijacking an old post.
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Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[jeffyjeff]

here you go. good luck with your project.
https://www.oldjapanesebikes.com/mraxl_GT_Resource/manuals/b100p_service/index.php

Here is some more interesting stuff.
https://www.suzukicycles.org/B-series/B100_brochures.shtml#gsc.tab=0
____________________
History shows again and again how nature points out the folly of men - BOC

[xX-Alex-Xx]

[A100man]

Hey JimmyJam, JeffyJeff's a yank like you and getting along famously here - two orange blobs already.

Lovin' the alliteration by the way guys - sure you don't know each other?
____________________
Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600

[Robby]

It is possible that it has 600 miles on, if something broke so fundamentally in the first 600 miles that it wasn't worth repairing.

[Easy-X]

[Robby]

Indeed, and I suspect the options will be that binary as is expected for "barn finds". It was either a lemon when new, or is knackered from years of use. Either way it will likely have quite a bit of monetary value from a small amount of work, but that is not the same as being something one would choose to keep.

[jeffyjeff]

[A100man]