Venice I Need spark plug cross reference please!

I have a 66cc Raw engine,that has a LD 28C plug....The weird thing is I bought 2 of these engine kits at the same time and one plug is much longer and bigger than the engine kit im running now.....What plug do I need to buy????
Thank you
John

Venice Motor Bikes said:

Talked to you on the phone this morning... Hope I helped.

Click to expand...

Yes you did thanks very much....
John