HD [Heavy Duty] frame bearings from NARAKU. The bearing set consists of left and right frame bearings with metal cages and the best FKM Premium seal kits.
The name of the bearing already indicates its load capacity. Only the highest-quality Japanese bearings with C3 clearance from one of the leading Japanese bearing manufacturers, NTN or KOYO, are used. With the HD set, you lay the foundation for all setups—whether for normal operation or racing.
Please note! When replacing the crankshaft assembly, always use new bearings and oil seals.
Explanation: The difference between FPM, FKM, and Viton®
Behind these abbreviations or names lies the same base material—fluorinated rubber. FKM is the abbreviation for fluoroelastomers according to the American ASTM standard. Viton®, on the other hand, is a trademark owned by DuPont Performance Elastomers.
All fluororubber products in our product line are identified by the abbreviation FKM.