Hello all Ive got an 86 xr100 with a worn out cylinder. I have a nice later model in spec cylinder and piston w/rings from an 08 or so crf100. I know the new cylinder is a bit longer than the old cylinder but can i use it with new style gaskets? I bolted it on but I can't get the cam gear on the cam with the timing chain on it, it is just a tiny bit short. The timing chains are the same for the years according to part numbers. Whats the secret to using the new cylinder?