• Koso exhaust gasket for Honda Grom
  • Koso Grom exhaust gasket, second view
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Scooterworks

Koso Exhaust Gasket for Honda Grom (2014-2021)

Koso Exhaust Gasket for Honda Grom (2014-2021)

$13.65 USD
$13.65 USD
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Fresh gasket, tight exhaust seal. This Koso replacement gasket is made for Groms running a Koso 170cc cylinder kit, so you can redo your exhaust joint without hunting for the right size.

🔍 Does this fit your bike?

  • Honda Grom 125, 2014–2021.
  • Made for Groms with a Koso 170cc cylinder kit installed.
  • Size: 28.5mm inner diameter, 32.5mm outer diameter, 4mm thick.

⚠️ Before you order

  • Listed for 2014–2021 Groms only — 2022+ models are not listed for this part.
  • Matched to the Koso 170cc kit exhaust port. Using it on a different cylinder setup? Confirm the port size first.

✓ What's in the box

  • Exhaust gasket
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