engine got missfire

[foxy]

as title got the marder out 4 a run today starts tickover good fast off the line when it reaches 3/4 throttle the engine starts to missfire ive changed the plug reset the carb but no change:lol:

 

[pablo]

i had that problem it turned out to be the piston ring.

 

[foxy]

put new ring in not long ago thinking of changing the coil wot do you think mate

 

[pablo]

yea it could be the coil, check the supressor cap allso

 

[atom3624]

How about simple things?
Are you sure the mixture is OK?
Perhaps the high is too lean.
Al.