BDL, repl. primary belt. 1-1/2", 132T+ (plus), 8mm pitch

This is the so-called '+' belt. For the '-' belt see fmc-506-915.

Note: The difference in belts between 65-78 and 78-83 FL, FX models is due to a minor difference in primary housing length. Available belts are therefore designated as a - (minus, slightly shorter / fmc-506-915) or + (plus, slightly longer / fmc-970-974) belt, although the number of teeth is identical.