Hello Respected fellow bass players on Talk Bass. I am currently looking for spares for the Yamaha Pulser 450 1987 model. Particularly the machine heads. I need to know what size of machine heads those are as I will need to replace the current ones ( parts missing) with new machine heads. I have searched ebay and a few other online bass spares stores and have only found the machine heads meant for smaller bores (holes)- The bores on the Pulser headstock seem to be of a larger size. I would appreciate it if anyone would advice me on what size of Machine heads to look for. Many Thanks and Cheers!