3Racing Sakura M4 SAK-M4S37 Reinforced Main Shaft Upgrade  [SAK-M4S37]

3Racing Sakura M Main Shaft M5 x 25 - SAK-M4S37
Price:
CAD$4.41
Brand:
3Racing
Model:
SAK-M4S37
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Spares / Hop-ups - 3Racing - Sakura M4 category
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Precision Drive Upgrade for Sakura M4

The 3Racing Sakura M4 Main Shaft SAK-M4S37 is a core drivetrain component built to boost reliability and reduce drivetrain wear. It brings tighter manufacturing tolerances and tougher materials to keep power delivery smooth during fast laps or club runs.

Benefits for Track and Club Racing

Every detail counts when setting up for a race. This 3Racing main shaft improves torsional stiffness and helps prevent premature wear on gears and bearings, giving more predictable handling and longer service intervals.

Fitment and Easy Swap

Made to match the Sakura M4 geometry, the SAK-M4S37 installs without frame changes or extra machining. It is a direct replacement for the stock shaft, making upgrades simple for routine maintenance or performance refreshes.

How hard is the installation for a weekend mechanic?

Installation is straightforward and uses the stock mounting points. Basic hand tools and a clean bench are enough for most hobbyists to swap the shaft in one session.

Will this improve drivetrain longevity?

Yes, the SAK-M4S37 is made to stricter tolerances which reduces backlash and uneven wear, helping gears and bearings last longer under sustained use.

Does it require other upgrades to work well?

No other parts are required, though pairing the shaft with well-set gear mesh and maintained bearings will maximise its benefits.

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