Purpose and Specifications

LIQUI MOLY 21717 Motorbike Engine Flush is a powerful 250 ml additive designed to clean oil circuits in 4-stroke motorcycle engines. It safely removes stubborn deposits, restores original engine performance, and promotes longer engine life without harming seals or catalytic converters.

One can treats up to 4.5 liters of oil. Add it to warm engine oil before your oil change, idle the engine for 10 minutes, then drain the oil and replace the filter. Works perfectly with wet clutches and all standard motor oils.

• Key Benefits: Deep cleans engine internals for smoother running and better power
• Safe Operation: Handles normal engine temps up to 120°C during idle cleaning
• Usage Interval: Use every 10,000 km or annually, or when oil looks dirty
• Shelf Life: 4 years unopened in cool, dry storage

When to Use / Replace?

Use before every major oil change, especially after long storage, high-mileage riding, or if you notice sluggish performance, higher oil consumption, or unusual noises. Ideal for bikes sitting idle over winter to clear built-up sludge.

Replace the treated oil immediately after the 10-minute idle—no need to drive. Regular use keeps your engine running like new, cutting wear and boosting efficiency.

FAQ

Is LIQUI MOLY 21717 safe for my motorcycle's catalytic converter?
Yes, it's fully tested and safe for catalytic converters, seals, and wet clutches in 4-stroke engines.

How often should I use this engine flush?
Every oil change (around 10,000 km or 12 months) or more if your bike has heavy deposits from poor maintenance.

Can I use it in cars too?
It's optimized for motorcycles but compatible with car engines—just check your oil capacity.