Headstock Bearings: KTM Supermoto 660 (2003-2006) Kawasaki Z550 then it's probably your coil

then it's probably your coil that's knackered

The seal thickness is approximately 2mm each

You will receive a bush kit with 2x 10mm

Yamaha XVZ 1300 ATHC Royal Star (USA Model) (1996)

Yamaha FJR 1300 A (2003-2012)

Headstock Bearings: KTM Supermoto 660 (2003-2006) Kawasaki Z550 then it's probably your coilBrand new set of headstock steering bearings to fit: KTM Supermoto SMC 660 (2003 2006). This set of head stock bearings are taper roller style and have been manufactured to replace the original set of steering bearings on a KTM Supermoto 660 for the years and models shown above. Top sized: 29mm x 50. 25mm x 15mm. Bottom sized: 29mm x 50. 25mm x 15mm. All sizes set out ID x OD x Thickness. If you require different sizes please click here to see our