Hero Xoom 125 CVT Power & Torque tuning with Roller Weight & Contra Spring

In this video, I explain scooter CVT tuning and performance modification using the Hero Xoom 125 as an example. We will look at how changing the roller weight and contra spring (torque spring) can affect scooter acceleration, pickup, RPM, power delivery, torque, and overall CVT performance. The important thing is that these CVT tuning principles are not limited to the Hero Xoom 125. The same basic concepts can be useful for many automatic scooters, including scooters from Honda, Suzuki, TVS, Yamaha, Hero and other manufacturers. However, the correct roller weight and spring setup can vary depending on the scooter, engine characteristics, CVT design, rider weight and intended use. • How scooter CVT transmission works • How roller weight affects acceleration and RPM • How lighter and heavier rollers change CVT behavior • How the contra spring / torque spring affects CVT shifting • Relationship between roller weight, RPM, acceleration and top speed • How to tune a scooter CVT for better pickup • How CVT tuning can change power and torque delivery • What to consider before changing roller weights • Hero Xoom 125 CVT modification and tuning • Practical considerations when selecting roller and contra spring combinations Roller weight and contra spring tuning should be done carefully. A setup that improves acceleration may affect cruising RPM, fuel economy, belt temperature, engine braking and top speed. The best combination depends on the particular scooter and how it is used. If you own a Hero Xoom 125, Honda Activa, Suzuki Access, TVS Ntorq, Jupiter, Yamaha RayZR, Fascino, Dio or another CVT scooter, the principles discussed in this video can help you understand how CVT tuning works and what changes when you modify the roller weights or contra spring. #HeroXoom125 #ScooterCVT #CVTTuning #RollerWeight #ContraSpring #ScooterModification #ScooterTuning #CVTModification #ScooterPerformance