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NGK plugs

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Pauarc:
D8eA plugs seem to foul up has anyone run d7ea plugs which runs hotter

Johnwebley:
On my 3 bikes, I have switched to Nippon Denso,

In the case of the Yamaha, it has made a tremendous improvement



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Martin6:

--- Quote from: Pauarc on May 25, 2023, 08:55:03 PM ---D8eA plugs seem to foul up has anyone run d7ea plugs which runs hotter

--- End quote ---

I was experiencing this too. I've found setting the air screw slightly leaner (1/8th turn) than I would have had it, just based on tickover response, has sorted it for all bar cyl 1. I'm now trying a further 1/8th turn out on no.1 and so far it's fine, but only tried 25 miles on that setting. The other things to double check are float heights set too high and needle too high. Maybe check your compression levels, too low can give sooty plugs.

Pauarc:
Fond this about plug fouling

Pauarc:
Compression all around 160, float set 26mm, needles on 3 grove, air screws 1-1/8th out, 40 slow jet 120main I have got some 110 coming

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