The cap below is on a new cdi that does not use the nipple, notice the small clip that catches on the threads on the plug. The second is one on one of my bikes that uses the nipple adapter, notice how close it looks to yours inside.
Yeah I thought it was odd that I had to remove that screw. I'm very new to this so I appreciate your patience. Thanks for your help and I'll try the new plug tomorrow!
Hi folks I got the bike up and running by leaving the cdi dry out and putting tinfoil on the top of the spark plug in place of the spark plug crown. I'll go out to pick up a new spark plug anyway because the tinfoil is a bit dodgy. Thanks for all your help I wouldn't have been able to do this without it!!