Okay I seem to have a problem with DPR9EA-9 NGK Plugs after about 3 to 4,000 Kls one or more seem to start breaking down sometimes only one plug does any one out there have the same problem ?? She just seems to idle rough and has a little miss down stairs but is still responsive.

 

I just put some in and they seem to be holding up ok. Haven't put that many miles on yet. Are you running rich and fowling them? or running lean and burning them up?

 

Thats the silly part they all look as if motor is running fine nice light grey and one will start to be a little dark ( Not Oil ) just a little dark I do put a lot of miles always nearly 500 Kls a weekend and then it has start stopping in traffic all week and also th eheat where I live gets damb hot too yesterday it was 42 Degrees Celsius, just maybe the heat from the climate and motor may be the cause ?

 

What year is your bike?

 

Hi Trips she is a 1992 good compression and approx 93,000 on the clock. Like I said she has plenty of get up and go ata bout 7,000 RPM she likes to lift that front wheel a bit. I put new plugs in her yesterday arvo after approx 3,500 Kls and she is good as gold again the local bike shop sugested it might be somethign to do with the jetting of my carbs ????

 

Rather than guessing about jetting, just get it dyno'd and that will reveal any flatspots

 

Hey:

Here is some info from the USA NGK site, that may help.

Dub



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