Air Filter Cleaning – Replacement Guide for 2008 KTM 105SX

Looking to keep your 2008 KTM 105SX running strong? Shop parts for a 2008 KTM 105SX Dirt Bike. Maintaining your air filter is critical for performance & engine protection on this powerful two-stroke motocrosser. MotoSport has you covered with this proprietary cleaning – replacement guide tailored to the KTM 105SX.

Why Air Filter Care Matters for the 2008 KTM 105SX

  • High-RPM Engine: The 105SX is built for aggressive riding – clean airflow prevents power loss & potential engine damage.
  • Off-Road Environment: Dust, sand, and grit clog filters quickly; regular service keeps your bike responding crisply.
  • Model-Specific Fit: Use filters designed for the 85/105 SX chassis for perfect fitment and optimal sealing.

Recommended Replacement Air Filters

  • Twin Air 154210 Air Filter – developed specifically for KTM 105SX, ensuring proper dimensions and reliable filtration.
  • OEM Part Numbers: 59006015000, 50306015000 fit the 105SX and compatible with other KTM two-strokes of similar years.
  • Other Aftermarket Options: BMC and Hiflo also offer direct fit foam options for best engine protection.

Air Filter Removal Steps

  1. Remove seat by releasing the rear fastener – the airbox is immediately accessible beneath.
  2. Carefully pull out the filter frame from the airbox, avoiding dirt dropping into the intake.
  3. Loosen the securing nut or clip holding the filter in place.

Cleaning Procedure (Foam Filter)

  1. Tap the filter to knock out loose particles before washing.
  2. Submerge the filter in a dedicated foam filter cleaner solution – never use gasoline or harsh solvents.
  3. Gently massage the dirt out, then rinse repeatedly until the solution runs clear.
  4. Squeeze (do not wring) excess water & let air dry completely.
  5. Once dry, re-oil generously with high-quality foam filter oil, working it thoroughly into every pore. The oil must be tacky but not dripping.

Inspection – Replacement Guidelines

  • Check for tears, holes, or hardened foam. Discard and replace if damaged.
  • Replace the air filter every season, after major dust events, or when cleaning will no longer restore pliability.
  • Always use the proper filter for the 2008 KTM 105SX chassis: generic filters risk leaks and dust bypass.

Reinstallation Steps

  1. Wipe down the airbox rim to remove any lingering dust.
  2. Reinstall the clean/oiled filter on the frame, ensuring perfect alignment and no gaps.
  3. Secure the mounting nut or clip – do not overtighten.
  4. Replace the seat and confirm it locks securely.

What Makes the 2008 KTM 105SX Airbox Unique?

  • The 105SX shares its airbox design with the 85SX, but uses a slightly larger foam filter for optimal flow – be sure to verify dimensions if purchasing aftermarket options.
  • Easy-access airbox means frequent filter maintenance is practical before every ride, especially critical for 2-stroke longevity.

Essential Tips for Long-Term Performance

  • Keep spare, pre-oiled filters on hand for race days.
  • Inspect the sealing lip of the airbox for damage every service; a perfect seal is crucial for engine health.
  • Never run a dry filter – oil traps fine particles before they reach your engine.

MotoSport delivers parts & accessories precisely matched for your 2008 KTM 105SX. Consistent air filter care makes the difference between podiums and premature rebuilds – maintain your filter and enjoy peak performance every time you hit the track.

Related Shopping Categories

Shop Air Filters for a 2008 KTM 105SX Dirt Bike.

Shop Air Filter Oil for a 2008 KTM 105SX Dirt Bike.

Shop Air Box Covers for a 2008 KTM 105SX Dirt Bike.

Shop Tools for a 2008 KTM 105SX Dirt Bike.

Shop Intake Parts for a 2008 KTM 105SX Dirt Bike.

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.