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

Peartune tuning kit removes the 16mph (25km/h) speed limit, allowing the motor to help you at higher speeds. With the speed limit removed, 28-37mph (~45-60km/h) can be expected, depending on the bicycle and gearing.

After exceeding 16mph (25km/h) your actual speed is indicated on the last two digits of the display. This works with km/h only.

Example:
- 22.3 corresponds to a speed of 23 km/h
- 23.1 corresponds to a speed of 31 km/h

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:

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)

The tuning chip for e-bikes with the newest Bosch Gen4 motor with Smart System.
Compatible with:
- displays KIOX 300, KIOX 300, PURION 200, INTUVIA 100
- motors Bosch Gen4 + Smart System - The module now supports drive unit software version up to 13.13.1

Not compatible with e-bikes that have a magnet attached to a valve (Bosch Rim Magnet).

Not compatible with with e-bikes with Bosch ABS system

If your e-bike has Bosch Gen4, Gen3 or Gen2 without Smart System, we recommend Peartune 3.0 for Bosch (incl. Gen4) or Peartune 4.0 for Bosch (incl. Gen4)

When connecting Tuning Kit to an e-bike you will find connectors colored to make installation very simple. We have prepared detailed instructions and videos to make installation easy for you. Disassembly of our tuning kit is just as easy. If you have any troubles with installation or disassembly, do not hesitate to contact us.

If you are planning to install Peartune on a brand-new bike, make sure you ride it for at least 0.6 miles (1 km) before the tuning kit is activated.

Installation Guide:

ATTENTION: If you wish to simply activate and use the tuning kit, follow the step 1 and step 4 of the video.
If you wish to see the closest possible speedometer value in KM/h, follow the steps 1,2,3,4.

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 2 years 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.