CrankDex

Cannondale MX400 Spark Plug

The Cannondale MX400 (440cc) takes an NGK CR9EK spark plug, gapped to 0.028".

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Key takeaways

  • Spark plug: NGK CR9EK.
  • Iridium upgrade: NGK CR9EIX.
  • Gap: 0.028 inch - set it before fitting.
  • Covers 2002.
Standard PlugCR9EK
Iridium UpgradeCR9EIX
Gap0.028"
Verified fitLast checked
Sources: NGK powersports application catalogue
Reviewed by the CrankDex editorial team against manufacturer and retailer fitment data.

Buy the plugs for your Cannondale MX400

The standard plug is the exact-fit replacement. The iridium version drops into the same spot, lasts longer, and fires a little stronger for a few dollars more. Many engines take more than one - check how many cylinders you have.

Shop the CR9EK plugStandard NGK plug + multi-packsShop Upgrade: CR9EIX iridiumLonger life, stronger sparkShop

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Frequently asked

What spark plug does a Cannondale MX400 take?

The Cannondale MX400 takes an NGK CR9EK spark plug, gapped to 0.028 inch. The iridium upgrade is the CR9EIX.

What is the spark plug gap for a Cannondale MX400?

The spark plug gap for the Cannondale MX400 is 0.028 inch. Check and set the gap before fitting a new plug - most powersports plugs need a small adjustment out of the box.

Can I use an iridium plug in a Cannondale MX400?

Yes. The CR9EIX is the iridium version of the CR9EK - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.

More parts for your Cannondale MX400

We cover the other consumables for your machine too - the exact fit, cited, in one place.

BatteryCannondale batterys

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