They use a 4mm Allen Key.
Honda Stainless Motorcycle Fairing Pan Head Allen Key Bolts m6 x 20mm - 10 Pack
Stainless Motorcycle Fairing Bolts Pan Button Head Select Length mm Size m5 m6
AEEAST 177Pcs Motorcycle Fairing Bolt Kit, M5 M6 Stainless Steel Windscreen Screws Fastener Clips Universal Fit for Sportbike Suzuki Kawasaki Honda Yamaha BMW Ducati GSXR Motorcycle(Green)
Suzuki Motorcycle Fairing Bolts Stainless Steel Select m5 m6 Shouldered Stepped
Motorcycle Fairing Bolts Stainless Pan Button Head Fairing Select mm Size m5 m6
2x Suzuki Stainless grab rail rear fairing hook bolts 46316-31F00 46317-31F00