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Transmission adjustment is not limited to adjusting the weight of the rollers of our variator, and the stiffness of our thrust spring: the final transmission is not to be left aside! Indeed, depending on the power and torque developed by its two wheels, a revision of the transmission ratio is to be considered. BUT, what is this transmission? HOW do you take it apart? HOW to find your way around all these gears: which one to change, how to choose them, How to calculate our transmission ratio? We will answer all these questions! Don't worry! ???? ???? The tools I use in this video: the 1/4' torque wrench: https://www.amazon.fr/gp/product/B07V... the 1/2' torque wrench: https://www.amazon.fr/gp/product/B075... the EASYBOOST clutch removal key: https://www.amazon.fr/gp/product/B071... ????Promotional code: thanks to your favorite channel????, you can take advantage of a 5% discount code at SCOOTFAST (that's already something!????). the code is: SIMONSF ???? Small links to essential tools for disassembling/reassembling your two-wheeler: A very good electronic caliper and always useful for this type of measurement: https://www.amazon.fr/gp/product/B082... PISTON BLOCK: https://www.scootfast.net/bloc-piston... The ratchet wrench set with tips TO DISASSEMBLE EVERYTHING: https://www.amazon.fr/dp/B07G2PN3CG/r... the vice you need: https://www.amazon.fr/gp/product/B01M... ⚙ Small config. : Good parts to optimize your scooter, easily: 50cc POLINI cast iron kit: https://www.scootfast.net/kit-cylindr... YASUNI z exhaust: https://www.scootfast.net/yasuni-exha... 17.5 PHBN carburetor: https://www.scootfast.net/carburateur... POLINI Hi-speed variator: https://www.scootfast.net/polini-vari... programmable rollers to adjust the variation to the hair: http://www.mir35.com/galet-programmab... With that, it will already be not bad! 00:00 Introduction 01:08 1 - What is a final drive and what is it for? 04:35 2 - Gear theory, to understand and calculate everything 08:05 3 - How a transmission is characterized, a story of number of teeth! 12:22 4 - Practical work: disassembly, reassembly of a final drive! 21:58 Conclusion and scootfast PROMO code I am Simon and I make mechanical tutorials for all 2-wheel enthusiasts, 50cc scooters or more. If you want to see me tackle specific topics, I will try to look into them: do not hesitate to tell me in the comments the topics you are thinking of. To ask me questions, technical difficulties, with photos, you can use the Instagram account linked to this channel: The Instagram account of the YouTube channel. https://www.instagram.com/p/CD1_0Aini...