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350TSS · 06-09-2017, 02:15 PM

They are drilled through the hex expanded mushroom head along the length of the bolt. All non safety critical bolts/set screws on my bike are drilled thus in a probably futile attempt to get the dry weight under 155kg

06-09-2017, 02:15 PM	#274
350TSS Too much time on my hands member Join Date: Jan 2013 Location: Shipbourne Bike: M900 Posts: 1,421	They are drilled through the hex expanded mushroom head along the length of the bolt. All non safety critical bolts/set screws on my bike are drilled thus in a probably futile attempt to get the dry weight under 155kg