PearTune MSO 4.0 for Bosch Smart System e-Bike e-MTB Tuning kit

The tuning kit manipulates the speed signal without altering the motor's power relative to pedaling speed. This guarantees a smooth motor control without speed limit interruptions. Depending on a tuning kit, some determine when assistance stops, while others remove the restriction entirely for continuous support. However, the achievable speed mostly depends on the eBike model. Achievable speed can be calculated using a simple formula:

Speed = Cadence [rpm] * Wheel circumference [mm] * Front Chainring Teeth / Rear Chainring Teeth * 60 [min/h] / 1.000.000 [mm/km]

The tuning kit can be activated directly on your bike’s display. After pressing the 'WALK' or '+ - + -' buttons, from now on you will be able to ride at a speed of 25 mph (40 km/h) and even up to 31 mph (50 km/h)!

To deactivate the tuning kit, press the 'WALK' or '+ - + -' buttons again. Your e-bike will then work the same as before installation of the chip.

Service menu video:

Please disable automatic updates in the eBike Flow App. And do not us flow app together with tuning kit.

The PearTune MSO 4.0 can be activated or deactivated anytime during the ride by short-pressing the LIGHT/WALK button or [+ -] buttons. Original function of these buttons remains unchanged. After activating PearTune - you will be able to ride at a speed of 25 mph (40 km/h), 31 mph (50 km/h) and even more than 37 mph (60 km/h)!

Specialized: Activation: ONE short press of WALK button and/or [+ - + -] buttons, or [- + - +], or [+ + - -]or [- - + +] / (↑ ↓↑ ↓) buttons or ONE LONG press of + Indication: displayed number 9.9/4.0 for few seconds after activation/deactivation (or equivalent in miles)

Bosch: Activation: ONE short press of WALK button and/or [+ - + -] buttons, or [- + - +], or [+ + - -]or [- - + +] / (↑ ↓↑ ↓) buttons Indication: displayed number 9.9/2.5 for few seconds after activation/deactivation (or equivalent in miles)

Bosch Smart System: Activation: ONE short press of WALK button and/or [+ - + -] buttons, or [- + - +], or [+ + - -]or [- - + +] Indication: displayed number around 19.0/12.0 for few seconds after activation/deactivation (or equivalent in miles)

Brose: Activation: ONE short press of LIGHT button or TWO short press of LIGHT button and/or [+ - + -] buttons, or [- + - +], or [+ + - -]or [- - + +] / (↑ ↓↑ ↓) buttons Indication: displayed number 9.9/2.5 for few seconds after activation/deactivation (or equivalent in miles)

Giant: Activation: ONE short press of WALK button and/or [+ - + -] buttons, or [- + - +], or [+ + - -]or [- - + +] / (↑ ↓↑ ↓) buttons Indication: displayed number 9.9/2.5 for few seconds after activation/deactivation (or equivalent in miles)

Giant Ridecontrol GO: Activation: ONE short press of WALK button and/or [+ - + -] buttons, or [- + - +], or [+ + - -]or [- - + +] / (↑ ↓↑ ↓) buttons Indication: displayed number 9.9/2.5 for few seconds after activation/deactivation (or equivalent in miles)

Yamaha PW-X3 PW-S2: Activation: TWO short press of LIGHT button Indication: displayed number 9.9/2.5 for few seconds after activation/deactivation (or equivalent in miles) InterfaceX no indication, only if any App for Yamaha e-bikes avalaible

Yamaha PW-X/SE/TE/X2/CE/ST
Activation: TWO short presses of the LIGHT button Indication: displayed number 9/2 for few seconds after activation/deactivation (or equivalent in miles)

TQ Flyon: Activation: ONE short press of LIGHTS button and/or [+ - + -] buttons, or [- + - +], or [+ + - -]or [- - + +] / (↑ ↓↑ ↓) buttons Indication: displayed number 9.9/2.5 for few seconds after activation/deactivation (or equivalent in miles)

Please note that the operation of this type of modified electric bikes on public roads may be against the law in some countries. The manufacturer takes no responsibility for damages resulting from the use of Peartune products. Electric bikes equipped with Peartune products are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with Peartune products can be used exclusively on private property and entirely at one’s own risk. The use of Peartune products may void the warranty of your ebike.

We strongly recommend using other safety features and protective gear to prevent injuries in higher speeds.

Peartune products are thoroughly tested and we stand by their quality - Peartune provides Lifetime warranty to all their products.

Warranty does not cover damage resulting from eBike software updates. Remove the tuning kit before updating the software. Check with us first to ensure the kit is compatible with your updated eBike. We cannot guarantee that the kit will function the same after updates. Please exercise caution.