• Koso 240 degree performance camshaft for Honda Grom
  • Koso Grom camshaft, second view
  • Koso Grom and Monkey camshaft
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Scooterworks

Koso 240-Degree Performance Camshaft for Honda Grom & Monkey 125

Koso 240-Degree Performance Camshaft for Honda Grom & Monkey 125

$186.90 USD
$186.90 USD
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Wake up the top end. The Koso 240-degree camshaft (MM623002) is built for strong high-RPM performance. It runs fine on a stock engine but really comes alive with Koso's 170cc big bore kit. Expect a rougher idle in exchange: higher duration moves the cam's power range up the RPM scale.

🔍 Does this fit your bike?

  • 2014–2021 Honda Grom 125 (noted by the manufacturer).
  • Also listed for the Honda Monkey 125.
  • Koso part number MM623002, 240° duration.

⚠️ Before you order

  • No returns on performance parts — please double-check your model year and fitment before ordering.
  • A 240°+ cam typically makes its best power between roughly 3,500 and 7,000 RPM, with a rougher idle than stock.
  • Best results with the Koso 170cc big bore kit.
  • Not intended for use on public roads or land.

✓ What's in the box

  • One 240° performance camshaft
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