Spark plug cap update for Guzzi 8V models

 

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It has come to our attention that some spark plug caps on 4-valve-per-cylinder Moto Guzzis develop high-voltage shorts to the cylinder head covers. This results in frequent misfires as well as occasional flickering dash lights.In recent models, factory engineers attempted to correct this problem by insulating the cover from the cylinder head. Nevertheless we think it is a good idea to update components to reduce failures.To do this, you’ll need two NGK iridium plugs and two straight NGK 5,000-ohm spark plug caps. Procedure:

  • Remove spark plug covers (2 tiny Allen screws under Guzzi logo clip)

  • Unplug spark plug caps and cut plug wires close to caps

  • Reroute plug wires behind frame tubes

  • Remove & replace spark plugs after first removing threaded adapters from the cap ends

  • Screw new plug caps onto plug wires and press them onto the new plugs

  • Replace spark plug covers and miniature Guzzi logo emblems

You are done. Sit back, relax and claim mechanic’s rights by your loved ones. Even better, go for a ride!

Note: there is a hole on the bottom of the spark plug cavity to drain any water and debris.Once you have completed this update, before removing the spark plugs always blow some compressed air to clean the surrounding area and prevent any debris from falling into the combustion chamber.

Spark plug update

Spark plug update

Spark plug update

Spark plug update

Spark plug update

Spark plug update .

Spark plug update

Spark plug update

Spark plug update

Spark plug update

Spark plug update