my spark plug cap came off 8 times in the distance of 1 mile. wat is wrong and what NGK spark plug will be best for my 70cc polini sport cylinder?
you may have the wrong bit on the end of the spark plug, they come as standard with a little ball on the end, yet some plug caps like my runner dont want the ball fitted, so you simply unscrew it and then plug the cap on. should be a tight click into place