639687 - $11.66 - NGK CR8EKB spark plug for 8V Norge, Stelvio NTX, late Griso 8V [639687] : MG Cycle, Moto Guzzi Parts and Accessories available online at MGCycle.com
Moto Guzzi Stelvio NTX 2013: SPARK PLUG CAP REPLACEMEMT
Moto Guzzi Stelvio NTX 2013: SPARK PLUG CAP REPLACEMEMT
MR8BI-8 - $17.96 - NGK Laser Iridium spark plug, V85TT, Guzzi 1A010638 [MR8BI-8] : MG Cycle, Moto Guzzi Parts and Accessories available online at MGCycle.com
Spark Plugs - MOTO GUZZI Griso Use And Maintenance Book [Page 86] | ManualsLib
639687 - $11.66 - NGK CR8EKB spark plug for 8V Norge, Stelvio NTX, late Griso 8V [639687] : MG Cycle, Moto Guzzi Parts and Accessories available online at MGCycle.com