I wouldn`t worry about ignition, if the insert got damaged you can just replaced the insert. up to the kz10c the inserts are interchangeable, the c is all different. a kz10b pipe or c is fine the c seems to have a little more off the corner and the b pulls a little stronger at the end. For what ever reason have had a couple of clips break over the years have also had piston cracks so is not a bad idea to check those on occasion. Hope this helps.