Running badly at low rpm.

[unfazed]

[quote author=PieEater link=topic=14154.msg160009#msg160009 date=1406495984]I think the ends of the HT leads can get brittle with heat and age and then engine vibes can then loosen them off so they don't make as good contact with the plug cap connector.

They would have to be pretty loose to cause such sever poor running and at a specific rpm. And surley this is limted to high mileage/age bikes though?
[/quote]

Not necessarily as the bike I was fixing was a 2003 with only10000 miles on it.