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Spark Plugs #10-12: Buell und V-Rod VRSC

Spark Plugs #10-12: Buell und V-Rod VRSC

  • fits Buell and V-Rod VRSC
  • porcelain / steel
  • thread: M12 x 1.25
  • thread length: 3/4 ”
  • wrench size: 5/8 ”
  • heat range HD-code: 10R12A
  • replaces Harley-Davidson part number 27671-01K, and 32335-04

Spark Plug Heat Ranges

Harley spark plug heat ranges are marked by numbers, from 2 to 12. No. 2 is the hottest plug, no. 6 would then be a relatively cool plug. The coolest plug used by Harley-Davidson is marked 10R12A. Double numbers characterize multi-range plugs.

With older motors, it was not uncommon, that you achieved an optimum with plugs of two different heat ranges. Unlike the well known prejudice implied, you had to choose cooler plugs for the front and hotter plugs for the rear cylinder. On later Harley engine designs, heat distribution is balanced to such an extent that you should not have to rely on those tricks anymore.

Item №
Version
Price incl. VAT*
unit
Availability in warehouse Germany
Spark Plugs #10-12: Buell und V-Rod VRSC
12-089
»OEM«; USA
10.40 €
each
Go to article
Spark Plugs #10-12: Buell und V-Rod VRSC
12-099
by Champion; connection thread: M4; manufacturer-code: RA6HC
6.09 €
each
Go to article
* The price includes German VAT (19% or reduced rate of 7% for Books).

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