An oil-drain service order for the 2003 919 can include a new crush washer, a magnetic plug or both. Identify the drain connection first. The plug’s thread specification and the washer’s three dimensions must be compared separately with the fitted hardware.
2003 Honda CB900F 919 · Oil-Drain Parts Buying guide
Choose a sound seal as well as the right thread
The 2003 919 drain connection needs both a compatible plug and a sound sealing washer. The offered magnetic plug is M12 × 1.5; the washer is 12 × 18 × 1 mm. These are product dimensions, so compare them with any repaired or altered drain before ordering.
The washer seals at the plug’s seat, while the thread holds the plug in place. Check both areas if the drain leaks. An oversize plug, thread insert or damaged seat needs its own identification and repair decision; forcing the listed M12 × 1.5 plug into an unsuitable opening is not a fit check.
Use the magnetic plug with normal oil maintenance
The magnet is intended to collect ferrous steel particles, not aluminum debris. It supplements the normal oil filter and oil-change routine. Clean and inspect the drain parts during service, follow the applicable installation instructions, and check for leaks after refilling.
Practical questions
Is a new washer enough, or should I order the plug too?
Inspect the existing plug and sealing seat first. If the plug is correct and undamaged, a suitable washer may be all the hardware needed. Replace or upgrade the plug only after confirming its thread and the condition of the drain opening.
What does Honda say about replacing the drain washer?
Use the washer inspection and replacement guidance for your exact year. The seller recommends a fresh washer whenever the plug is removed; that is a conservative service choice, not a universal statement of Honda’s replacement interval.
Does a magnetic plug let me extend the oil-change interval?
No extension is established for this product. Keep the oil and filter maintenance schedule for the motorcycle. The magnet catches only certain particles and does not make contaminated or aged oil serviceable again.
Not sure which part you need?
Send your model and year, plus photos of your existing part and any changes to the original setup.