S6 - stopping engine

[douglas1947]

Hi,

my S6 is running now.
I can not get the carburetter as low in throttle to stop the engine.
This type of engine has no valve lifter and also the magneto has no cut out.

There is also no advise in the instruction book.

How do other S6 user stop their bikes?

Michael

[graeme]

Yes, a bad oversight by the manufacturer here. I put the bike in gear and release the clutch with the font brake on, to stall the engine.

[douglas1947]

Hi Graeme,

thanks for your reply, that is just the way I do to stop the engine.
Indeed, it is not perfect and not elegant.

A friend of mine send me a picture (find it in internet), showing a S6 with BTH magneto with a cut out on the braker cap (bacalite?).
My magneto has a brass cap and I think there not much space for a bigger one.

Michael

[cardan]

Sometimes completely closing the air lever and grabbing a big handful of throttle will stall the engine reliably. It might be kinder on the transmission than the other method.

Leon

[douglas1947]

Leon,

I will try your way stopping the engine on the next ride!

Michael

[ManfrerdSt]

you have to build only one other cover on the magnetometer, then you can use a kill switch.

Regards
     Manfred

[Bert]

I tried pulling a spark plug lead but the engine kept running. Used to stall it but now I use Leon's method. Works every time.

[douglas1947]

I have tried Leon`s method, it works when I have closed the petrol tap some seconds before to lower the petrol lever in the carb.
With noirmal level the engine revs up.

Manfred, I would like to know, what is inside the magneto cap behind the srew.
On my cap this hole is used for breathing the contact breaker housing and there is no space to make a cut out mechanism.

Michael

[cardan]

what is inside the magneto cap behind the srew.

The screw is electrically isolated from the cap (or sometimes the cap is made of an insulator like bakelite). Usually there is a flat spring-steel blade that presses on the top of the hex screw that holds the contact breaker in place. The screw is part of the primary circuit - grounding it from the outside shorts out the primary circuit (low voltage) and the magneto will not produce a spark.

Leon

[ManfrerdSt]

In the cap is a spring plate with a coal running on the central screw.
If you connect the screw to "ground", you make a short circuit and the spark is gone.
Regards
     Manfred

[douglas1947]

Hi Leon and Manfred,

thanks for your informations about the mag cap.
My BTH magneto has the same cap, but unfortunately without the "kill spring".
The hole for the srew is filled with a rubber plug and I think the spring is missing. So I had thought it is for breathing.

I know the bakalite cap from my T35`s Lucas magnetos. But these caps won´t fit, because there is not enough space to the S6 flywheel.

Has anyone an idea to where I can get a spring and coal for the BTH cap?

Michael

[cardan]

http://www.ebay.co.uk/itm/292231845057

Leon