Aprilia RS 250 1997 Use Maintenance Book

For optimal performance, change the oil every 1,500 to 2,000 miles or at least once a year. Always use high-quality two-stroke oil.
The recommended tire pressure is 33 psi for the front tire and 36 psi for the rear tire. Always check the pressure when the tires are cold.
Check the battery charge, inspect spark plugs for wear, ensure the fuel is fresh, and verify the operation of the kill switch.
Use a high-quality ethylene glycol-based coolant mixed with distilled water at a 50:50 ratio. Ensure the coolant is suitable for aluminum engines.
Loosen the rear axle nut, adjust the chain tensioner bolts evenly, and ensure the chain has about 20-30mm of slack at its midpoint. Tighten the axle nut after adjustment.
Stop the engine immediately, allow it to cool, check the coolant level, inspect for coolant leaks, and ensure the radiator is not blocked.
Replace the spark plugs every 6,000 miles or as needed if you notice engine misfires or starting issues. Use the recommended spark plug type.
Regularly check brake fluid levels, inspect brake pads for wear, and ensure the brake lines are free from leaks or cracks. Replace components as necessary.
Use unleaded gasoline with an octane rating of at least 95 RON for optimal performance and to prevent engine knocking.
Regular maintenance, using high-quality fluids, keeping the air filter clean, and ensuring the exhaust system is free-flowing can enhance performance. Consider professional tuning for further improvements.