Tired double nutting your exhaust nuts. These nuts are from Yoshimura and have special steel locking teeth to help with vibration. Stainless steel 8mm sold in pair. These nuts are essential. The smaller, 10mm diameter head allows for extra clearance between your wrench and the pipe for easy access.
These also work on the Honda Grom
Standard is 8mm thread diameter.
Exhaust studs for GY6 150cc and Honda 49cc engine M6 






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