RRP Main Shaft Assembly for Yokomo MX4 – RRP-030 - COMING SOON
We’re proud to announce the upcoming release of our RRP Main Shaft Assembly for the Yokomo MX4 and MR4 series. This reproduction project brings new life to a platform long constrained by limited OEM parts availability.
Our main shaft assembly retains all original dimensions and specifications, ensuring full compatibility while introducing enhanced durability. Designed with performance in mind, this is a direct-fit upgrade that meets the demands of modern racing.
Stay tuned for launch details.
Compatible with:
Yokomo MX4
Yokomo MR4 Series (MR4BC, MR4TC, MR4MT)
Rubrix RX4E, RX4D, RMP, and RMX models.
Fine Materials: 
7075 Aluminum Front Drive Pulley.
7075 Aluminum Rear Drive Pulley.
GR5 Titanium Main Shaft.
7075 Aluminum Rear Pulley Plate.
4x8x6 Rear One Way Bearing (1).
4x8x3 Bearings (4).
Highlights:
Durability
Consistent Performance
Lightweight
Specs: Front one way.