Kawasaki KLR650 Turn Signal Bulb Size

Additional Notes

• The two bulb types used across the Kawasaki KLR650 turn signal positions are the PY21W and the 12496. Both operate on a 12-volt electrical system, making them electrically compatible in terms of voltage rating.
• The PY21W is an ECE-standard single-filament amber bulb rated at 21 watts. It uses a BAU15s bayonet base, which is an offset-pin fitting designed to prevent incorrect installation in sockets that require a specific rotational orientation.
• The 12496 is a part number associated with Philips and Osram and is classified as a halogen bulb intended for specialty applications. Its wattage is not specified in the provided data, which means it cannot be confirmed as a direct watt-for-watt equivalent to the PY21W.
• The BAU15s base of the PY21W is distinct from the more common BA15s base. The offset pins on the BAU15s are not symmetrically placed, so a BA15s bulb cannot be substituted without a socket adapter or modification.
• Front and rear turn signal positions on the KLR650 do not always share the same bulb type within a given model year. For example, the 2013-2016 model years use a PY21W at the front but a 12496 at the rear, meaning the front and rear positions require separate bulb selections.
• The PY21W is an amber-colored bulb by construction, meaning the glass envelope itself is tinted. This differs from clear bulbs used in amber-lensed housings, and substituting a clear bulb in a housing designed for a pre-colored source would affect the output color.
• For the 2008 model year, both the front and rear turn signal positions share the PY21W specification, making it the only year in the dataset where a single bulb type covers both positions simultaneously.
• The 12496 designation follows a manufacturer part-numbering convention rather than an industry-wide standard classification, which means cross-referencing with the ECE or SAE bulb numbering systems would be necessary to confirm interchangeability with other bulb families.