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If Gear Shift doesn’t work

The main rule to solve a problem , ofter valid in other field , is to follow a line from INPUT to CONTROLLER and finally the OUTPUT .

In our case the INPUT is the sensor , the CONTROLLER is the strategy and the OUTPUT can be checked on data acquistion .


Sensor Setup ( the INPUT )

To setup correctly the Gear Shift some simple checks should be made .

First of all the Load Cell Sensor should be checked :

  1. Configure the Load Cell sensor ( menu calibration /load cell force )
    1. Set the Offset to the same value You read on Load Cell Analog channel
    2. Set the Gain to the value You can read on Your sensor datasheet ( usually 500 N/Volt ) , set the sign ( + or – ) to obtain a positive value on Load Cell Force channel applying a force to increase gear ( 1->2->3 and so on … )

Strategy Setup ( the CONTROLLER )

For Gear Shift Up :

  1. Enable the gearshift from Working Modes ( menu Rider Setting / Workmode Setting )
  2. Setup the basic features only ( menu Gear Shift / Gear Shift Up Enable )
    1. All Options = OFF
    2. Debounce Time = 200 mSec
    3. ReArm Force = 150 N
    4. Trigger Force = 250 N
    5. Min GAS = 20 %
    6. Min SPEED = 0 km/h
  3. Setup the CUTS ( menu Gear Shift / Gear Shift Up Cuts )
    1. TDC Loop Size = 10
    2. For All gear ( included default ) Set Cut Timeout = 70
  4. Switch OFF both IGNITION and INJECTION ( menu Gear Shift / Gear Shift Up Cuts )
    1. Set INJECTION Pattern #1 = 00000000
    2. Set IGNITION Pattern #1 = 00000000

For Gear Shift Down :

  1. Enable the gearshift from Working Modes ( menu Rider Setting / Workmode Setting )
  2. Setup the basic features only ( menu Gear Shift / Gear Shift Down Enable )
    1. All Options = OFF
    2. Debounce Time = 200 mSec
    3. ReArm Force = -150 N
    4. Trigger Force = -250 N
    5. Max GAS = 10%
    6. Min SPEED = 0 km/h
  3. Setup the BLIP ( menu Gear Shift / Gear Shift Down Blip )
    1. For All gear ( included default ) Set Cut Timeout = 200
    2. Setup the whole table for Target TPS = 20 %

Data acquistion check ( the OUTPUT )

After setting up everithing here above , You can check what happens on data acquistion . You could setup Your data analyzer with following channels :

  • RPM , TPS , SPEED
  • LOADCELL , GEAR_POS
  • CUT_LEVEL , CUT_FUNCTION , STR_FUNCTION
  • GEARSHIFT_UP_SM , GEARSHIFT_DN_SM

It would be perfect if You can show STR_FUNCTION using a BIT MASK instruments ( You could check Your data analyzer functionality ) . Check the Supersport Channels Explained post for more details .

Now You can check if all “chain” work like should .

So when rider press pedal ( LOADCELL ) value pass the TRIGGER THRESHOLD , then the STR_FUNCTION must signal the GEAR SHIFT strategy active , and CUT_LEVEL must be 100 % ( for GearShift Up ) , and TPS move up ( for GearShift Down ) .

If something don’t happens like expected , made some step back and check Your configuration .


For a detailed description We advise to read carefully following documents :

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Gear Shift Strategy ( Team ) 1.2 Mb 91 downloads

User manual for gear shifting strategy , present on most applications with different…
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Gear Shift Startegy ( Team ) Yamaha 1.4 Mb 142 downloads

User manual for gear shifting strategy , specific version for Yamaha ECUs ( YMER6WSS…
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Load Cell Sensor Datasheet 600.98 KB 82 downloads

Datasheet for Load Cell sensors . It’s a force sensors for Gear Shifting use . …

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