How to Change the Oil in a 1982 Honda CR250 (Proprietary Guide for MotoSport.com)
Shop parts for a 1982 Honda CR250 Dirt Bike.
The 1982 Honda CR250 is a legendary two-stroke motocross bike, and proper oil changes are critical to keeping your transmission and clutch working smoothly. This step-by-step guide covers the tools you need, clear instructions, and important model-specific tips to ensure a robust, mistake-free oil change every time.
Tools & Supplies Needed
- 17mm socket (for drain bolt)
- 10mm socket (for check bolt, if applicable)
- Ratchet or wrench
- Drain pan
- Rubber gloves (for protection from used oil)
- Clean rags (for wiping spills and cleaning surfaces)
- Funnel (for pouring in new oil)
- Measuring cup or Ratio Rite (for accurate oil measurement)
- New sealing washer for drain bolt (recommended)
- Recommended transmission oil: 10W-40 motorcycle oil or a 2-stroke gear oil (e.g., Maxima MTL Transmission Lube)
- Container for old oil disposal
Model-Specific Call-Outs: 1982 Honda CR250
- Transmission oil system only: The 1982 CR250 is a two-stroke and does not use engine oil for combustion lubrication, but it requires regular transmission/gear oil changes for proper clutch and gear life.
- Oil capacity: Approximately 0.69 US quarts (0.65 liters) at oil change. Check your service/oil cap for the exact mark and do not overfill.
- Oil check bolt: Use the oil check bolt to confirm oil level after filling. This design ensures you can't overfill or underfill the transmission.
- Torque specs: Drain bolt should be tightened to 21 lbf–ft (29 N–m) and the oil check bolt to 7 lbf–ft (10 N–m).
- Use a new washer to prevent leaks at the drain bolt.
Step-By-Step Instructions
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Warm up the bike.
- Start your CR250 and let it idle for 3 minutes. This thins the oil, suspends contaminants, and allows for more complete draining.
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Secure the bike upright.
- Place the bike on a stand or crate so it’s vertical on a level surface. This ensures proper oil drainage and correct leveling for refill.
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Remove the filler cap.
- On the right side of the engine, twist off the oil filler cap. This step prevents a vacuum that could trap oil inside.
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Drain the old oil.
- Slide your drain pan underneath the engine. Use the 17mm socket to remove the drain bolt from the bottom of the crankcase. Be careful; the oil may be hot.
- If your bike is equipped with an oil check bolt, consider removing it during draining for an even more complete oil change.
- Allow several minutes for all oil to drain. You can tip the bike gently from side-to-side (using handlebars) to get residual oil out, but do not tip excessively to avoid spills.
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Inspect and clean the drain bolt.
- Wipe the drain bolt and inspect for any metal shavings, which could indicate excessive wear inside the transmission.
- Install a new sealing washer on the drain bolt if available. This is critical for preventing leaks.
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Reinstall the drain bolt.
- Screw in the drain bolt by hand first to avoid cross-threading, then tighten with a torque wrench to 21 lbf–ft (29 N–m).
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Add new transmission oil.
- Using your funnel and accurately measured oil (0.69 US qt or 0.65L), slowly pour the oil into the filler hole. Avoid spilling oil on the engine or exhaust.
- Allow the oil to settle for a minute before checking the level.
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Check oil level with the oil check bolt.
- Remove the oil check bolt if equipped (usually 10mm, on the right side of engine).
- If oil starts to flow out of the check bolt hole, the level is correct. If not, add oil slowly until it begins to drip out. Stop immediately and reinstall the check bolt to the specified torque (7 lbf–ft (10 N–m)).
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Reinstall the filler cap.
- Screw the cap back on securely to prevent dirt contamination and leaks.
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Properly dispose of used oil.
- Poured oil should be taken to an authorized recycling center; do not pour it down drains or onto the ground, as it is hazardous to the environment.
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Test the bike.
- Start the engine and let it idle for a minute. Check for oil leaks around the drain and check bolts. Shift through gears to confirm smooth operation.
Tips for the 1982 Honda CR250 Oil Change
- Check and change oil every 3 races or 7.5 hours of runtime for optimal transmission and clutch performance.
- If you see milky or frothy oil, you may have a water leak into the transmission; service the engine as soon as possible.
- Use high-quality, motorcycle-specific gear oils for the best clutch feel and component protection. Avoid automotive engine oil in two-stroke transmissions.
- Never overtighten bolts—this vintage case can be damaged if torqued excessively.
Conclusion
Regular oil changes are vital for the longevity and performance of your 1982 Honda CR250. This time-tested process, combined with the recommended tools, the correct oil, and attention to model-specific details, will keep your two-stroke’s transmission and clutch in top shape all season long. For all your oils, filters, and tools, trust MotoSport.com – your one-stop shop for dirt bike maintenance.
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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.