RX King Bakelite Crankshaft – Standard 50 mm Stroke

Description

The crankshaft is the soul of a 2-stroke engine. In high-performance tuning, the “dead space” inside the crankcase can slow down the mixture flow. The RX King Bakelite Crankshaft solves this by using high-density Bakelite inserts to “stuff” the crank webs. This reduces primary compression volume, forcing the air-fuel mixture into the combustion chamber at a much higher velocity. The result? Instant throttle response and a powerband that hits harder than ever.

Why the Bakelite “Stuffed” Crank is a Performance Essential:
Increased Primary Compression: The orange Bakelite inserts fill the gaps in the crank webs. This reduces the “dead volume” in the crankcase, significantly increasing the pressure that pushes the fuel-air mixture through the transfer ports.

Rapid Throttle Response: By increasing the velocity of the intake charge, this crankshaft eliminates the low-end “laziness” often found in modified 2-strokes, giving you a crisp, aggressive snap every time you twist the grip.

Standard Stroke (50mm) Precision: Designed for riders who want high-performance scavenging without the complications of a “long-stroke” build. It fits perfectly into standard RX 135 / RX King engine cases with no machining required.

High-RPM Stability: The Bakelite material is significantly lighter than steel but incredibly heat-resistant. This reduces the overall reciprocating mass of the crank, allowing the engine to climb through the rev range with less vibration and internal stress.

Precision Balanced: Every unit is factory-balanced to ensure smooth operation at high speeds, protecting your main bearings and ensuring a “vibration-free” ride even at the redline.

Specifications at a Glance:
Compatibility: Yamaha RX King / RX 135 / RXG (5-Speed & 4-Speed)

Stroke: 50mm (Standard Stroke)

Feature: Full-Circle Bakelite “Stuffing” Inserts

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