How to Change the Oil in a 1982 Yamaha IT250

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If you own a 1982 Yamaha IT250, routine maintenance is key for keeping your two-stroke running at its best. Even though the IT250 is premix lubricated for the engine, the transmission takes its own oil, which still requires periodic changes. This guide, proprietary to MotoSport.com, will walk you step-by-step through changing the transmission oil, listing the required tools, outlining each task, and calling out any specifics unique to the 1982 IT250.

Tools & Supplies Needed

  • Socket set (metric, typically 12mm or 14mm for drain plug)
  • Ratchet or wrench
  • Oil catch pan
  • Rags or shop towels
  • Funnel
  • Measuring cup (for oil quantity)
  • Replacement transmission oil (Yamaha recommends SAE 10W/30 "SE" name-brand motor oil for the IT250 transmission, but double-check your manual)
  • New drain plug washer (recommended, optional)
  • Torque wrench (optional but highly recommended)
  • Gloves (optional for cleanliness)

Steps to Change Transmission Oil

  • Warm Up the Engine
    The oil drains better when it’s warm and flows freely. Start the bike, let it idle for 2–3 minutes, then shut it off.
  • Secure the Motorcycle
    Place the bike on a center stand or lift, or lean it upright against a sturdy support to keep it level.
  • Locate the Drain Plug
    The drain plug is found underneath the engine, centrally located, with a flange head bolt. Place your catch pan underneath.
  • Remove the Drain Plug
    Using your socket and ratchet, carefully loosen and remove the drain plug. Be cautious: oil may be hot. Let the old oil drain completely; this can take several minutes.
  • Inspect the Drain Plug & Washer
    Check for metal debris and replace the crush washer if worn.
  • Reinstall the Drain Plug
    Thread the plug in by hand, then torque to manufacturer spec if available (do not overtighten). Overtightening can damage the threads.
  • Remove the Filler Plug
    The filler plug is located above the kick starter, on the clutch cover right side. Remove this plug to add new oil.
  • Add Fresh Oil
    Using a funnel, add the correct amount of fresh oil. For the 1982 IT250, the capacity is approximately 750 ml (double-check your specific service manual for confirmation) of SAE 10W/30 SE-rated oil.
  • Allow Oil to Settle & Check Level
    Let the bike sit for a minute, then check the oil level (using the oil check bolt or level window if equipped) to ensure proper fill. Add more if necessary, being careful not to overfill.
  • Reinstall the Filler Plug
    Install and snug the filler plug.
  • Clean Up
    Wipe off any excess oil and dispose of used oil in accordance with local environmental laws.
  • Test Ride and Final Leak Check
    Start the engine, let it idle, and inspect for leaks at the drain and filler plug. Take a short ride, then recheck for any signs of leaking and confirm oil level once more.

IT250-Specific Callouts and Tips

  • No Engine Oil Filter: The 1982 IT250 two-stroke has no oil filter for engine lubrication because the engine is lubricated by premix. You are changing the transmission oil only.
  • Recommended Oil Spec: Yamaha recommends high-quality SAE 10W/30 "SE" transmission oil. Avoid using automotive oils with friction modifiers, which can degrade clutch performance.
  • Oil Quantity: 750 ml is typical, but always verify with a current service manual for your particular bike.
  • Level Check: The IT250 may have a small oil-level bolt or window. Remove the plug briefly after filling; oil should trickle out slightly when at correct level.
  • Brake Cleaner: If oil spills on the frame or case, use a rag and a little brake cleaner to remove residue.
  • Drain Plug Torque: If unavailable, tighten the plug snugly but do not overtighten to avoid stripping threads—just firmly hand-tight with a short wrench.

Conclusion

Changing the transmission oil on your 1982 Yamaha IT250 is straightforward and requires only minimal tools. With regular oil changes using the correct product and proper fill quantity, your IT250's gearbox will reward you with crisp shifts and long life in the harshest trail conditions. Always consult your service manual for updated specifications and refer to MotoSport.com for parts and further technical resources.

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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.