Sooo... a CBR929 that belongs to a friend of mine decided to play 'spark plug cannons' and shot one of the plugs out at high revs. He's offered the bike to me quite cheap and I just need to fix the thread in the spark plug hole. I don't have much money to spend at the moment, so I'm thinking I might just pull the frame off the bike and get a mechanic to pop a helicoil in for me for the time being. Has anyone had any experience in using helicoils to fix spark plug threads and if so, what was the result? Cheers.