I have new fuel, a good spark and a clean carb. But my bike just will not start or even fire either with choke on or off.

Timing problem ? New plug ...

Kill switch....bet ye.

Has it been parked up with petrol switched on and flooded the engine? Is the spark plug wet?

Try a new plug....then tell us it worked........set the gap correctly

set the gap correctly

set the gap correctly?

Going over your older posts, your bike has been:

Difficult to start and only starting with an open throttle.

Revings it's self up when idling.

And now won't start at all, yet it has fuel and a spark.

 

Time for a leak down test.

Basically you bung the intake and exhaust up and see if the crankcase and cylinder hold some pressure.

https://www.youtube.com/watch?v=zdq7NRcUIp8

 

Edited April 14, 201511 yr by goudrons

Going over your older posts, your bike has been:

Difficult to start and only starting with an open throttle.

Revings it's self up when idling.

And now won't start at all, yet it has fuel and a spark.

 

Time for a leak down test.

Basically you bung the intake and exhaust up and see if the crankcase and cylinder hold some pressure.

https://www.youtube.com/watch?v=zdq7NRcUIp8

thanks, will look into it.