⚙ On TESTE une TRANSMISSION LONGUE ! ⚙

"Changing the final drive to a longer ratio increases top speed, decreases acceleration...": Is this myth true? To find out, what better way than to change the transmission on a 70cc setup and test it out! In this video, we'll take a closer look at this, discuss what can be changed, and especially WHEN to do it! Road tests LET'S TALK! 🔺 ERRATUM: When I present the table of transmission ratios for products available on the market at minute 8:28, you'll have understood that these are: 1/r, 1/r1, 1/r2... but I'm sure you already understood. 😊 🛒 Equipment used in this video: DOPPLER final drive (complete secondary pack): 1/10.4 gear ratio https://www.scootfast.net/transmissio... 1/4" torque wrench: https://www.amazon.fr/gp/product/B07V... 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 enjoy a 5% discount code at SCOOTFAST (that's something!😎). The code is: SIMONSF 🔧 Here are some essential tool links for disassembling/reassembling your two-wheeler: A very good electronic caliper, 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 bits FOR DISASSEMBLING EVERYTHING: https://www.amazon.fr/dp/B07G2PN3CG/r... the vise you need: https://www.amazon.fr/gp/product/B01M... ⚙ Small Config.: Great parts to easily optimize your scooter: 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 fine-tune the variator: http://www.mir35.com/galet-programmab... With that, it's already pretty good! 00:00 Introduction 00:50 1 - When and why upgrade your final drive? 04:07 2 - How to upgrade your transmission and when? 11:22 3a - Testing phase - initial conditions and configuration 14:20 3b - Unboxing and assembly of the DOPPLER transmission 21:14 3c - Road tests and interpretation of results 25:33 CONCLUSION on the tests + SCOOTFAST PROMO code I'm Simon and I create mechanical tutorials for all two-wheel enthusiasts, scooters 50cc or larger. If you'd like me to cover specific topics, I'll try to address them: feel free to let me know in the comments what you're thinking of. To ask me questions or address technical difficulties, with photos, you can use the Instagram account linked to this channel: The YouTube channel's Instagram account. https://www.instagram.com/p/CD1_0Aini...