Here are all the options parts for the Xray X4F
Reference 06302663-V2
Brand: XRAY
COMPOSITE BALL JOINT 4.9MM - OPEN (8) - 302663-V2
Reference 06302240-M
Brand: XRAY
X4 COMPOSITE HUB - MEDIUM - 302240-M
Reference 06305778
Brand: XRAY
OFFSET SPUR GEAR 78T / 48 - HARD - 305778
Reference 06930508
Brand: XRAY
BALL-BEARING 5x8x2.5 STEEL SEALED - OIL (2) - 930508
Reference 06305242
Brand: XRAY
DRIVE SHAFT REPLACEMENT PLASTIC CAP 3.5 MM - ORANGE - STRONG (4) - 30
Reference 06305866
Brand: XRAY
OFFSET SPUR GEAR 96T / 64 - 305866
Reference 06303139-K
Brand: XRAY
ALU SHIM 3x6x7.0MM - BLACK (10) - 303139-K
Reference 06305870
Brand: XRAY
OFFSET SPUR GEAR 100T / 64 - 305870
Reference 06326181
Brand: XRAY
STAINLESS STEEL BATTERY WEIGHT 35G - 326181
Reference 06305784-O
Brand: XRAY
"SPUR GEAR ""H"" 84T / 48 - ORANGE - 305784-O"
Reference 06305578-O
Brand: XRAY
FIXED PULLEY FOR LAYSHAFT WITH BEARINGS 20T - GRAPHITE (2) - 305578-O
Reference 06302063-K
Brand: XRAY
T4 ALU ADJUSTMENT BALL-BEARING HUB - BLACK (2) - 302063-K