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FB Fulmar Kill Switch

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FB Fulmar Kill Switch

Post  Brentis1 on Fri Jan 06, 2017 1:17 am

Hi Gents,

Can anyone advise if a 1962 FB Fulmar should be fitted with a kill switch. My one did not have one on arrival so I block the carb off for stopping the engine or purposely stall using first gear - neither desireable if an emergency stop is required. I ordered a FB Fulmar BMS manual and the wiring diagram does not show one. I have also shorted all three of the low voltage wires coming from the alternator/magneto to the chassis and the engine continues to run.

It just seems strange a bike would not be fitted with an electrical stop. Any advice or suggestions would be great - even if some one has retro fitted such a device connection detail would be really helpful.

Cheers

Brent

Brentis1

Posts : 41
Join date : 2016-06-11

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Kill Switch

Post  FB vincent on Fri Jan 06, 2017 9:00 am

It is normal on 2 stroke engines to set the carburettor so that the throttle shuts completely when the handlebar twistgrip is backed off.

This discussion has taken place many times on this forum. Villiers carburettors (normally) have no throttle stop at all; the Amal carb fitted to your engine does have a throttle stop, but the design was used on both 4 and 2 stroke engines so included this feature.

2 stroke engines will normally tend to 4 stroke on the overrun unless the throttle is completely shut, hence the lack of a throttle stop.

The above may seem odd to those used to modern bikes, but we are talking about 60 years ago when the world was different! Sandy

FB vincent

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Join date : 2009-01-20
Location : Hertfordshire

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