Cross-Reference
Champion RCJ6Y vs NGK BPMR7A
Updated 2026-05-20
A practical spark plug comparison for small 2-stroke equipment, including how to use cross-reference pages without assuming fitment.
Verify before ordering: Fitment can vary by serial number, production date, region, and sub-model. Match the OEM number and physical dimensions before ordering.
Cross-Reference Is Not the Whole Fitment
RCJ6Y and BPMR7A are common cross-reference plugs in small 2-stroke equipment, but the model page still needs to match the actual equipment.
Confirm thread reach, terminal style, resistor type, heat range, and the required gap before ordering.
When the Old Plug Disagrees
If the plug in the machine does not match the model table, check whether the engine, cylinder, or ignition setup has been changed.
Do not copy a plug from a used machine without checking the model reference; previous owners often install close-looking substitutes.