I have to check my bike came with a different almost new ignitor box, FZ has the jets in carbs from new that are power increases from FZR factory.Meaning FZR has less GRUNT than FZ. Also I fitted 64mm pipe from the 4into1 s/s header-collector and added an aprillia 706 dual outlet muffler, with the narrower section cut off the inlet making a FAT pipe straight into the can.Seemed to be extraordinary but no recorded data to support my satisfaction. I support the ‘no mirrors gain’ theory too. 44 tooth sprocket at back but too much hassle to count that front one. There is a pic of mine on Facebook / FZ750ownersclub; its painted blue/blue/blue(3 tone).