Anyone have experience with Motoplat tachometers on RDs? I'm running a Motoplat ignition which works fine, but the tach doesn't work at all when connected to the LH cyl. coil, and reads twice the engine RPM when connected to the RH cyl. coil. This tach and igntion worked on an RD motor previously, but maybe I've missed something transferring it to this one? Please help.