• Koso heavy duty clutch kit for Honda Grom and Monkey
  • Koso Grom clutch kit contents
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Scooterworks

Koso Heavy Duty Clutch Kit for Honda Grom & Monkey 125

Koso Heavy Duty Clutch Kit for Honda Grom & Monkey 125

$144.90 USD
$144.90 USD
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If your Grom's clutch starts to slip after a cam, intake, exhaust or big bore, this is the fix. Koso's heavy-duty kit pairs six springs that are 60% stiffer than OEM with five high-friction discs and four steel plates for a crisp, positive engagement and full torque to the rear wheel. Made in Taiwan.

🔍 Does this fit your bike?

  • Honda Grom 125 (MSX125): 2014 to present.
  • Honda Monkey 125: 2019 to present.
  • Direct bolt-on for the Honda 125cc horizontal engine. Manufacturer part number FA623002.

⚠️ Before you order

  • No returns on performance parts — please double-check your model year and fitment before ordering.
  • Pro tip: soak the new friction discs in fresh 10W-30 or 10W-40 motorcycle oil for 15–30 minutes before installing.
  • Springs are about 60% stiffer than OEM for a firmer lever feel.

✓ What's in the box

  • 6 heavy-duty clutch springs
  • 5 friction discs
  • 4 steel plates
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