Hello! I bought a KAWASAKI GPZ-600-R Ninja Bj87 with a mileage of approx. 70,000KM for 400€ about 3 weeks ago she had bought a new Tüv, a tuning exhaust from BSM (with BE) and when I had it with me, I examined everything and found out that the translation was changed. “Original 15/39” – “built up 13/39”. I have no comparison to the original but one I can say it turns very high and creates 240Kmh at 13000 min?1, (is that normal?, What can I do? a smaller pinion brings more power to the suit and higher speeds, at wikipedia.org the klappersaki is only able to achieve max. 217kmh. Do you have experience with this? According to a translation calculator I have a translation factor of 3.00 original would be 2.60. with the phone I read it, were so on the 243kmh and on the tacho about 240. Tires are on it by Brideestone (with, Ubb) V: 120/80-16 M/C 60V (ORIGINAL V: 110/90V16) H: 150/ 80-16M/C 71V ( ORIGINAL H: 130/90V16) Thank you for your reply.