Hello! Just before I ask the question: I passed my A2 driver’s license yesterday. And my father has a Suzuki dr 650 SE from 1999. This has 32 kW and an unladen weight of 165 kg, which results in a power weight of 0.20. This means that I can drive it with the A2 driver’s license. Now my father said he changed the pinion. Original has the machine 15 teeth in front and back 41 and he said that now the machine has 14 teeth in front and 43 in back. l? Thus it should be better machine in the passage, but at the final speed a little slower. Bzw. if it is legal, you have to register this change? or can I drive with it without hesitation? The machine actually gets slower by this change than the entered final speed. He meant that he ordered this kit: https://www.louis.de/…/10048000?… So to break all this down: I want to make sure that everything is legal and I don’t bleme. And my driver’s license is not endangered. Would look forward to professional answers!