Westland Customs, US to Metric riser stud kit. 1/2-13 to M12 - Honda/Suzuki 989167 977818 (early style forked design)

977818 (early style forked design) or 977828 (late style wire-design)

improving ignitability and reducing quenching

Some use valve grinding paste

There are 3 types of base according to carb

a clutch hub nut lock washer and a clutch hub key

Westland Customs, US to Metric riser stud kit. 1/2-13 to M12 - Honda/Suzuki 989167 977818 (early style forked design)Stainless steel. This riser stud kit makes it possible to mount US 1 2 13 threaded risers to most Japanese and European bikes. 1 2" 13 x 3 4" to M12 x 50 mm. Body diameter (hole in triple clamp): 12 mm. Total length: 90 mm. Kit includes 2 bushings, 2 lock nuts. Easy to install