Spark Plug B9HS for 1955-'69 R50S, R69 & R69S (See Applications)
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NGK B8HS (Old Bosch # W260T1, W3AC) Spark Plug is correct for the following 1955-'69 Twins:
• R50S (Short Reach Heads Only)*
• R69 & R69S (Short Reach Heads Only)*
These NGK Spark Plugs are the correct NON-resistor spark plugs for 1948-69 models called for by BMW. Do not use resistor plugs or use spark plug caps with a resistance over 1 Ohm.
*Short reach heads will have no "LK" stamped marking on the cylinder head. Compare with installed plugs, short reach plugs have thread depth of 1/2 inch.
Don't forget spark plug gap gauge to double check the electrode gap. See recommended products.
