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Discussion Starter #1
Adjusting my valves, just got the cover off and realized I don't have a small spark plug socket. What size do I need? It's for an '88 CBR 600 if that helps but I'd guess that most bikes are the same.
 

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Either 16mm or 18mm. In the mid-80s, most Hondas used 12mm plugs, which take an 18mm socket, but by the mid-90s many had changed to 10s, which take a 16mm socket.

I believe that if the NGK spark plug designation begins with a C (e.g., CR9EH9) it requires a 16. If it begins with a D (DPR8EA-9), you'll need an 18.

If you're looking for a really nice spark plug socket, I've found them both at Kowa Tools and at Griots Garage. Your Snap-On rep can help you, too.
 

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NGK DPR8EA-9. 18mm it is. Thanks for the help man :)
 
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