How To Install a Clutch Kit on a 2022 KTM 85SX Dirt Bike

How To Install a Clutch Kit on a 2022 KTM 85SX

Why Replace the Clutch on a 2022 KTM 85SX

The 2022 KTM 85SX is a lightweight motocross 85cc twostroke built for aggressive starts and tight track work. Those riding patternslaunching from the gate, frequent slipping on low traction, and hard clutch modulation in woods or sandspeed wear on a wet multiplate clutch. Signs you need a clutch kit include slipping under acceleration, dragging or grabbing when releasing the lever, inconsistent lever feel, difficulty shifting, or a lever that feels unusually soft or stiff. Replacing the clutch restores reliable power transfer, crisp throttle response, and better shift quality.

Clutch System Overview for the 2022 KTM 85SX

The 2022 KTM 85SX uses a cableoperated wet multiplate clutch. That means lever free play and cable condition directly affect engagement, and components you'll inspect include the clutch cover, pressure plate, springs, friction plates, steel drive plates, clutch hub, clutch basket, hub splines, thrust washer and pushrod. Proper oil condition is also important since the clutch runs in engine oil.

Preparation and Workspace

• Park the bike on a stable, level stand with the engine cool.
• Gather tools: basic hand tools, impact or ratchet for clutch cover bolts, clutch spring tool or socket, new clutch kit, fresh engine oil, drain pan, clean rags and a parts tray.
• Clean the area around the clutch cover to keep debris out when you open the case.
• Decide whether to drain oil you can remove the clutch cover on some KTM 85SXs without full oil change, but draining makes a cleaner job. If you drain, capture oil and plan to refill with the correct oil after assembly.

Removing the Clutch Cover and Assembly

Loosen and remove the bolts securing the clutch cover in a crisscross pattern to prevent flex. Pull the cover straight offsome residual oil may remain, so keep the drain pan ready. Note the clutch cable routing and any guide pieces so you can reinstall them the same way.

Disassembling the Clutch

• Loosen and remove the clutch springs evenly, taking note of spring location. Keep springs together by position.
• Remove the pressure plate and set it aside.
• Slide out the stack of friction plates and steel drive plates. Remember the ordermost kits install friction and steel plates alternately, starting with a friction plate against the basket. Counting and photographing the stack before removal helps during reassembly.
• Remove the clutch center nut and the inner hub if needed to access hub splines and the basket. Keep the thrust washer and pushrod components together.

Inspection Checklist

• Friction plates look for glazing, burned surfaces, or excessive thinning. Glazed plates will appear shiny and may slip even if thickness seems acceptable.
• Steel drive plates check for blueing, warping, or heavy discoloration. Slight surface marks are normal; severe heat spots or warpage warrant replacement.
• Clutch basket fingers inspect for notching where plates engage. Significant grooves cause drag, chatter or misengagement and may need attention.
• Hub splines ensure splines are not rounded or heavily worn; damage here often shows as slop in the clutch stack or hard engagement.
• Springs compare free length to the unused springs in the kit. Weak, uneven springs result in slip and should be replaced as a set.
• Thrust washer and pushrod check for flatness and smooth surfaces; pitting or wear affects engagement and lever feel.
• Oil condition dark, burnt or gritty oil accelerates wear. Plan to change oil when reassembling.

Preparing New Plates and Components

For a wet clutch like the 85SX, soak new friction plates in engine oil for at least 10-15 minutes before assembly so they absorb oil and seat correctly. Keep steel plates dry and stack them alternately with the soaked friction plates as you reinstall. Clean the clutch cover mating surface and replace any gasket or Oring if damaged.

Reinstalling the Clutch

• Slide the plates back into the basket in the original sequencetypically friction plate first against the basket, then steel, alternating until the stack is complete.
• Reinstall the pressure plate evenly. Insert clutch springs and compress them slowly and evenlytighten spring bolts in a crisscross pattern to seat the plate flat.
• If you removed the inner hub or pushrod, reinstall the thrust washer and ensure the pushrod moves freely without binding.
• Reattach the clutch cable to the lever and ensure it seats correctly on the release mechanism.

Clutch Cable and Engagement Adjustment

With the 2022 KTM 85SX's cable clutch, set free play at the lever per usual feelsmall free play at the lever ensures release at idle yet prevents constant drag. Check the cable for binding or frays; a stretched cable can mimic clutch wear and should be serviced or replaced. If the lever feels inconsistent after installation, inspect routing and lubrication of the cable run before assuming mechanical failure.

Reassembling Cover, Oil, and Final Checks

• Replace the clutch cover and tighten bolts progressively to seat the cover evenly.
• Refill engine oil if drained, using the recommended oil for a twostroke power valve and clutch environment.
• Operate the clutch lever several times with the engine off to confirm smooth movement and correct free play.
• Start the engine and test engagement at low throttle in a safe arealisten for chatter and confirm no slipping under modest load. Recheck cable free play after a short heat cycle; minor adjustments are common as new plates seat.

Riding Notes and When to Service Again

After a fresh clutch kit, expect firmer engagement initially that eases as the plates bed in. Aggressive gate starts, sand, or constant slipping shorten clutch life on an 85cc motocross bike. Regular oil changes with proper oil and checking cable condition will help maximize the life of the new kit. If you notice persistent slipping or grabbing after bedding, reinspect basket fingers, hub splines and verify springs were installed correctly.

Wrap Up

Replacing the clutch on a 2022 KTM 85SX is a straightforward task for riders with basic to intermediate mechanical skills. Careful inspection of the basket, hub, plates and springs, correct plate soaking and even spring installation restore the bike's throttle response and power transfer. Proper cable adjustment and good oil keep that rebuilt clutch performing reliably on the track or in the woods.

Related Shopping Categories

Shop Clutch Kits for a 2022 KTM 85SX Dirt Bike.

Shop Clutch Baskets for a 2022 KTM 85SX Dirt Bike.

Shop Clutch Springs for a 2022 KTM 85SX Dirt Bike.

Shop Inner Hubs and Pressure Plates for a 2022 KTM 85SX Dirt Bike.

Shop Clutch Covers for a 2022 KTM 85SX 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.