150cc gy6 exhaust nut size

[coachhejl]

What's the size of nut that secures the exhaust to the bottom of the motor?

My scooter started making a loud obnoxious sound but power and performance was normal...looked underneath and there are zero nuts holding the exhausts out of the motor...I guess just the side of the body mounts are all that's holding it on.

What size are those bolts?

Thanks

[fuzzyruttin]

Depends on what bike you got. GY6s can be put on just about anything really. Or are you asking about the header bolts? Pic?