I keep fouling plugs and I've pulled out a few plugs that did not look fouled, but do not spark when I test them. Then today I could not get a new plug to show sings of sparking. However when I check the plug with the bike in the gagage (darker) I can see a faint blue spark, but it's really tiny. If I wheel the bike outside (even though it's really cloudy) I can't see the spark. My experience tells me that I sould be able to see a nice healthy fat spark, Is this true for WR's? Is it possible that the ingition is getting weak? I put a new plug in the bike and it runs great, until the plug fails. Any advise?