Standard plug keeps failing

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Tallisman

Pack Dog
Joined
Nov 26, 2012
Messages
60
Reaction score
0
Location
Western Cape
Bike
Suzuki DR650
As topic suggests - when I service the bike and fit standard plug, it will fail before next service.
It appears to spark etc..however I suspect the insulation on the centre electrode fails and the spark is buried in the housing rather than at the tip (perhaps overheating).  I always resort to the dual electrode CE9 which was fitted to the bike when I purchased - Its still running with this plug today.

Bike is standard, standard exhaust, jetting etc...  Snorkle removed.  Any possible explainations....
 
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