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YAMAHA BOLT, HEXAGON SOCKET HEAD
This part 901100639600 is an OEM Yamaha part which is used for various purposes. It is also part of the YZF-R9 Phase 2 Engine Kit. The YZF-R9 Phase 2 Engine Kit contains this part (x8).
See picture for full kit.
BOLT, HEXAGON SOCKET HEAD
Ten Kate Racing Products - Official GYTR Pro Shop
Yamaha has revealed the GYTR Yamaha YZF-R9 kit parts in 2 different kits:
1) Phase 1 Trackday kit > use these GYTR parts to upgrade the performance of your YZF-R9 trackday bike.
2) Phase 2 FIM NG World Supersport kit > used by Stefano Manzi in 2025 on his Championship winning Yamaha YZF-R9. This kit also includes the compulsory FIM homologated parts.



