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Secondary Gear kit Naraku 15/37 +20% for GY6 125-150cc - NK901.23
  • SKU: NK901.23
  • Availability: in stock Many in stock Out of stock You can purchase this product but it's out of stock

Secondary Gear kit Naraku 15/37 +20% for GY6 125-150cc

$138.99
Shipping calculated at checkout.
  • Vendor:Naraku
  • Barcode: 4250362424532
DESCRIPTION
The Naraku 15/37 +20% Secondary Gear Kit is a performance secondary gear set designed for the final drive of scooters equipped with GY6 125cc to 150cc engines (e.g., Honda Ruckus GY6, Kymco, PGO, SYM). It replaces the OEM gears with a 15/37 ratio, resulting in a final drive ratio approximately 20% shorter than the original.

In a transmission, the secondary gear ratio (sprocket and chainring) acts as the final multiplication of revolutions, meaning the last conversion of engine/transmission rotation to the rear wheel. A shorter final drive ratio (more teeth on the chainring side compared to the sprocket):

increases traction and acceleration,

changes the engine speed ↔ wheel speed distribution,

improves low- to mid-range throttle response.

This kit is useful when you want:

more responsiveness and torque when exiting corners,

better traction uphill or when loaded,

to get the most out of a slightly modified engine without sacrificing too much top speed.