SOHC.co.uk Forums > CB500/550

spark plugs cb550

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andy_c101:
rick
sent you a PM, one some of my experiences with K3 carbs.
Andy

totty:
What is the problem? The common flat spot around 5k or something else?
Regarding plugs I tend to use NGK iridium on all my bikes, no noticeable benefit when everything's right but I've never had a bad one, I've never had one foul even when the mixtures been well out and they last ages.

peterengland:
I have the same bike and carbs, I run D7's don't run DR7's though. You can use D8's but mine runs best on the 7

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