headstock bearings and seals yamaha yz400 yz 400 1998 1999 Kawasaki ZXR250 If you have a weak

If you have a weak spark on your Honda NV600 then the coils could be the culprit and it's a good idea to get some new coils on the bike

Bore Size: 58mm

If you're looking to improve the spark on your XJ550 then upgrading your coils is a good place to start as the original coils are now about 40 years old

Kawasaki GPZ 1100 (ZX 1100) A (1983-1984)

To replace OEM 21121-1038 and or 21121-1039 on Kawasaki Z1100 or KZ1100 as it's sometimes known

headstock bearings and seals yamaha yz400 yz 400 1998 1999 Kawasaki ZXR250 If you have a weakBrand new set of headstock steering bearings and seals to fit: Yamaha YZ 400 F (1998 1999). This set of head stock bearings are taper roller style and have been manufactured to replace the original set of steering bearings on a Yamaha YZ400 for the years and models shown above. Top sized: 28mm x 52mm x 16mm. Bottom sized: 30mm x 52mm x 16mm. All sizes set out ID x OD x Thickness. The seals are not included in the measurements. If you require different