i have a aprilia climber 240 have had it for about 5 months now and had no problems wth it till now. The bike was running fine then it just cut out took plug out to see if it was sparking and no spark so i changed the plug and it worked for about a hour and then the same no spark with new plug so i got another plug and that is sparking. any one know what could be causeing this to happen also dose anyone know what spark plug should be in a climber 240......................... thanks simon