I decided to check out iridium plugs for faster starting and lower fouling. After 1 year with regular stock NGK plugs the number 1 cylinder was black fouled,
not enough to affect performance but noticeable. Bike doesn't start any faster most of the time. Would have never have tested them, local bike shop
$16.99 a plug. Internet price less than $30 delivered for a set of four. 1 year from now I'll report on the fouling aspect. Ken

