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iridium spark plug LMAR 9 AI-8 (97225)

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iridium spark plug LMAR 9 AI-8 (97225)

Order ID 50070101510
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NGK Iridium Spark Plug LMAR ? AI-8

High quality at a reasonable price, which is why NGK is the original equipment supplier for so many motorcycle manufacturers.


  • LMA = thread diameter: 10 mm, thread length: 26.5 mm
  • R = with interference suppression resistance (5 kOhm)     
  • 8 or 9 = heat value  
  • A = spanner width: 14 mm
  • I = iridium electrode tips
  • -8 = 0.8 mm electrode gap

Corresponds to the OEM:
LMAR 8 AI-8 = BMW 12 12 7 728 657.
LMAR 9 AI-8 = KTM 772 39 093 000

For a technically correct mounting, spark plugs must generally always be mounted with the appropriate torque spanner.
In order to prevent damage to the spark plugs or engine by improper installation, tighten them to the following tolerances:
Aluminium cylinder head = 15-20 Nm
Cast-iron cylinder head = 15-25 Nm

Price each

Shipping & delivery


We always give our best to handle your order as fast as possible. Orders which are placed before 2 pm on a work day are usually handed over to our logistics partner (DHL) on the same day if in stock.


Shipping cost

4.95 Euro within Germany, Poland  

5.95 Euro in Austria, Belgium, Denmark, Luxembourg, Netherlands

9.95 Euro    Spain, Finland, United Kingdom, Italy, Sweden

14.95  Euro    Cyprus, Czech Republic, France, Greece, Hungary, Ireland, Portugal

19.95  Euro    Estonia, Lithuania, Latvia, Malta, Slovenia, Slovakia, Romania, Bulgaria

All delivery costs are charged per order.



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