Denso Iridium spark plugs

Previously wrote:

Has anyone used these plugs in a standard good condition 99?I understand they can make a difference in quicker Dommies but are they worth it for an old girl like mine. Many thanks, Chris.

Hello There OK for Norton's fitted with a Distributor and points or a boyer or parzon conversion . But No good if you have a Magneto these plug are fitted with a resistor witch will damage you magneto its puts too much resistance on the magneto coil yours Anna j

The above is from the Denso website http://www.densoiridium.com/find_part.php It even lists the spark plug for a Manxman! They must be really famous. No mention in the literature that it is a resistor plug, but what would I know? Gordon.

P.S. The first colum shows the standard Denso plug, the second the Iridium one. Monster plug gaps though...

Previously wrote:

Dominator (650 cc)N/A3093(W22ES-U)5307(IW22)N/A0.028Manxman (650 cc)Hello Norton Manxman Plugs Bosch W7DTC Or W6DTC Twin carb Set up Or Champion N4 twin carb set up Champion N5 single carb set up NGK B6ES or BP6ES.For Single Carb Set Up Or twin Carb set up NGK B7ES for spark plugs try the Green Spark-plug co These Spark plugs have No resistors fitted inside So there Ok for magnetos . Magnetos do NOT like Resistors in line too the spark plugs A resistor will slowly kills your magneto Yours AJD N/A3093(W22ES-U)5307(IW22)N/A0.028

I have just fitted NKG BPR6IEX iridium plugs in my '61 99. I wanted to put in Denso IW22 plugs or NKG 7's but could not find any in Perth, Western Australia. The compression ratio in my bike is 8.5:1 and I run RITA electronic ignition. So far I have not noticed a great deal of difference, I think the bike starts more easily, it always has been good though and may be slightly smoother.

Best wishes,

Don

Previously wrote:

I have just fitted NKG BPR6IEX iridium plugs in my '61 99. I wanted to put in Denso IW22 plugs or NKG 7's but could not find any in Perth, Western Australia. The compression ratio in my bike is 8.5:1 and I run RITA electronic ignition. So far I have not noticed a great deal of difference, I think the bike starts more easily, it always has been good though and may be slightly smoother.

Best wishes,

Don

Hello Yes this will be OK its Electronic ignition And Not a MAGNETO I have ONLY put down the spark plugs That are sited Too The Magneto Models