Spitting Tiger Cub

[peteR]

Hello guys.  I have a 1963 TIger Cub that I guess should have a Zenith carb?  However, someone has fitted a monobloc to it.  It starts well, and ticks over fine.  However, when the throttle is opened, there is a lot of intermittent spitting though the carb - but the engine does seem to run "OK" despite this.  Does ayone have any ideas as to what may normally cause this?

Thanks Pete

[douglas]

Go down one size with your slide cutaway, or check for air leaks between carb and head.