Over Fueling only top cylinder

the lodger · 21-04-2023, 12:36 PM

Did you buy your plugs from a reputable supplier? There are a lot of NGK fakes out there.

CarloL · 21-04-2023, 01:31 PM

Quote:

Originally Posted by the lodger

Did you buy your plugs from a reputable supplier? There are a lot of NGK fakes out there.

they are an authorised NGK distributor

the lodger · 21-04-2023, 07:09 PM

Sorry I don't know the answer to this ( Luddite will know ! ) but do M900 have resistor type plug caps as standard ? You really need non-resistor caps to fire an iridium plug efficiently .I'm guessing our old style ignition systems are already being challenged by these plugs.

Luddite · 21-04-2023, 08:16 PM

Well...this is the workshop manual for the early 900 and you can see they run with 5000 Ohm resistors in the ignition circuit.

Having said that, the standard plugs, (Champion RA6HC), also carry resistors.

I don't think you can get NGK iridium plugs without the resistors.

21-04-2023, 12:36 PM	#1
the lodger Registered User Join Date: Oct 2019 Location: Chorley Bike: M900 Posts: 160	Did you buy your plugs from a reputable supplier? There are a lot of NGK fakes out there. __________________ Contents may settle !

21-04-2023, 07:09 PM	#3
the lodger Registered User Join Date: Oct 2019 Location: Chorley Bike: M900 Posts: 160	Sorry I don't know the answer to this ( Luddite will know ! ) but do M900 have resistor type plug caps as standard ? You really need non-resistor caps to fire an iridium plug efficiently .I'm guessing our old style ignition systems are already being challenged by these plugs. __________________ Contents may settle !

21-04-2023, 08:16 PM	#4
Luddite Registered User Join Date: Aug 2011 Location: Southampton Bike: M1100evo Posts: 2,465	Well...this is the workshop manual for the early 900 and you can see they run with 5000 Ohm resistors in the ignition circuit. Having said that, the standard plugs, (Champion RA6HC), also carry resistors. I don't think you can get NGK iridium plugs without the resistors.