Re: plug wire
The CDI (the black block) should be fine...these are basically indestructible. The rest of the ignition hardware STINKS. Replace the wire and cap with a decent quality automotive assembly. The wire leading into the block is actually screwed in there, and kept from loosening with glue. You can simply unscrew the wire from the block (lefty-loosey) and screw in your new and cut-to-proper-length ignition wire...no glue necessary.