Jet Set

[sloopjohnrb]

1962 948cc.
This is a strange one.
I recently altered the fuel mixture to rectify some slightly rough running.

It was then that I noticed the very top nut, the ssecuring one, had come loose and had turned with the adjustment nut.
I retightened the securing nut, checked the adjustment nut was 2 full turns down, but since that moment, she refuses to start.


is it possible that I have disturbed the jet centre or something similar?


Battery new, spark at plugs.

I am really puzzled.


Help!
Best wishes
John

[smithskids]

Must have disturbed the jet. Re-centre it and check the needle is at the right height and free and comes all the way down and hits the bridge at the bottom. Bingo.

[bmcecosse]

You have probably jammed the needle by putting the jet off centre. As above - recentre and check the piston rises and falls easily.

[sloopjohnrb]

HI
Many thanks, will do, later today.
Best wishes