250cc CVT Performance Package Level 1
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This BPNW 250cc CVT performance Level 1 package comes with a set of six 23x18 Dr Pulley slider weights, and a black, yellow, or red main clutch spring!
Depending on your choice of spring and slider weights, this upgrade can give you better low end take-off and smoother acceleration. Your vehicle should react better when downshifting and coming out of corners!
Buggy Owners: Most popular choices (and why!)
- 13g: For those who want maximum low end power for climbing and acceleration and do not care about top speed. Works best with the stock or black main spring. Aftermarket CDI encouraged to allow for more RPMs.
- 15g: For those with a decent amount of hills to climb or want much better low end power without sacrificing significant top speed. Works best with the blue or yellow main spring. Aftermarket CDI a good idea.
- 17g: Great all-around weight for a mix of hills and flat trail riding. Works best with the yellow or red main spring. Aftermarket CDI worth considering.
- 19g: For mostly flat ground trail riding with occasional hills. Some low end gain, excellet top speed retention. Works best with the yellow or red main spring. Aftermarket CDI worth considering.
Note: Using Slider weights that are at the lower end of the weight scale can be too light to overcome the main torque spring tension (expecially wih the stronger performance main torque springs) before hitting the RPM limiter in the stock CDI (spark ignition unit). This can result in less top speed. You can typically get around this using a performance CDI unti with a higher RPM ceiling.
Spring Choices and Information:
Black: Low/midrange spring tension. Stronger than the stock main spring. Ideal for flatter ground or to give a small boost to transmission responsiveness. Best choice for scooters looking to upgrade the spring (vs the other main springs) as it will keep overall RPMs lower than the other springs.
Good for all 250cc buggies and works well with lighter variator weights when you don’t want to lose top speed from hitting the RPM limiter in the stock CDI.
Yellow: Midrange tension spring that works best with CF250, Yamaha 250/260/300, Linhai 260/300 based motors. It does not fit well to the CN250 motor found in most all 250cc buggies with forward / neutral / reverse gearing. If your buggy does not have high and low forward gearing, please choose the black or red spring instead.
The yellow spring improves transmission responsiveness and “downshifts” the CVT more quickly than the stock or black spring, getting you back into the lower transmission gear ratio faster for more power when you get back on the throttle. Also helps with acceleration.
Red: Higher tension spring that works with all 250cc buggies based around the CN250 and CFmoto 250 engines, as well as CH250, Yamaha 250/260/300, Linhai 260/300 based motors.
The high tension red spring helps improve low speed power and climbing ability, as well as making the transmission much more responsive when letting off the throttle. It will quickly downshift the CVT to get you back into the low gear ratio when cornering or slowing. Works best with 17g or heavier weights for most applications, but can be also be advantageous when used in a Rock Crawler setup when trying to maximize low end power.
Products in photo not to scale. New Black spring has replaced the blue spring in this package.
Add in the 39mm / 41mm reversable 1/2" driver socket to make installing the spring behind the clutch easier!