I really need to change out my spark plugs. However, when I try to use my 14mm 1/2" deep socket it doesn't fit. Does anyone think if I use a 1/4" drive 14mm deep socket that will work? I'm so frustrated
I have a 3/8" drive spark plug socket that has always worked for me, though I must admit I've never done the plugs on an MT-07. But you might find a tube spanner, rather than a socket, works fine as that will be completely open and also thin walled. Earlier Yamahas used to have one in the original toolkit, but I'm not sure if there's one in the MT-07 toolkit (I no longer have the bike), but if not there are plenty on eBay. The recommended torque is only about 10 Nm so you don't need anythng particularly fancy.