Got these to fit to bike as they are 90 degree cup. One end is clear goes on sparkplug but the end where sparkplug lead goes in to seems to have a thread do I need something special to attach the wire as I can not work it out? Kart Spark Plug Cap NGK LB05EMH Red Brand New Best on Ebay | eBay
above plus make sure you stop turning once it goes tighter or you will impair the snug fit (about 7 - 10 turns at a guess)
If you look down the hole you'll see a screw thread poking up, you literally just screw it onto the end of the HT lead. Perhaps now would be a good time to also fit some top quality HT leads...
If they are wire core leads, I always find it easier to use a very thin screwdriver and run a pilot hole up the middle of the wire core before attempting to screw the cap on......and as Chris says, don't overtighten otherwise it will just pull off. AL
Dunno mate, it's a long time since I've had to buy HT leads. A quick email will get the answer I'm sure.
