GP1800 2018-2020 harness and accessories

40 products

  • Sealing plug for knock sensor connector

    Karel Tuning Sealing plug for knock sensor connector

    10 in stock

    This connector is intended to keep the harness waterproof in applications that do not have a knock sensor installed Fits: Yamaha GP1800 series main harness Yamaha FX series main harness Yamaha FZR series main harness

    10 in stock

    $8.95

  • Sealing plug for nitrous connector

    Karel Tuning Sealing plug for nitrous connector

    5 in stock

    This connector seals the main harness in applications that do not use nitrous. Fits: Yamaha GP1800 series main harness Yamaha FX series main harness

    5 in stock

    $7.65

  • Sealing plug for oil pressure connector

    Karel Tuning Sealing plug for oil pressure connector

    10 in stock

    This connector is intended to keep the harness waterproof in applications that do not have an oil pressure sensor installed Fits: Yamaha GP1800 series main harness Yamaha FX series main harness Yamaha FZR series main harness

    10 in stock

    $7.75

  • Sealing plug for rotary trim connector

    Karel Tuning Sealing plug for rotary trim connector

    10 in stock

    Ensures the harness stays waterproof when not using a rotary trim pot. Fits: Yamaha GP1800 series main harness Yamaha FX series main harness Yamaha FZR series main harness

    10 in stock

    $7.95

  • Sealing plug for secondary fuel pump connector

    Karel Tuning Sealing plug for secondary fuel pump connector

    10 in stock

    Ensures the harness stays waterproof when not using a secondary fuel pump. Fits: Yamaha GP1800 series main harness Yamaha FX series main harness Yamaha FZR series main harness

    10 in stock

    $6.95

  • Sealing plug for spare switch connector

    Karel Tuning Sealing plug for spare switch connector

    10 in stock

    Keeps the main harness waterproof for applications that do not use a spare switch Fits: Yamaha GP1800 series main harness Yamaha FX series main harness

    10 in stock

    $8.95

  • Sealing plug for tunnel pressure connector

    Karel Tuning Sealing plug for tunnel pressure connector

    10 in stock

    Ensures the harness stays waterproof when not using a tunnel pressure sensor. Fits: Yamaha GP1800 series main harness Yamaha FX series main harness  

    10 in stock

    $7.95

  • Starter solenoid connector kit

    Karel Tuning Starter solenoid connector kit

    Yamaha WaveRunner starter solenoid connector kit Fits all 1.8L Yamaha WaveRunner personal watercrafts (PWC) A complete kit contains: 1 connector G12 2 contacts B35 4 red seals A51 2 cavity plugs A52

    $15.95

  • Throttle body connector kit

    Karel Tuning Throttle body connector kit

    Yamaha WaveRunner PWC throttle body connector kit. Engine harness side This connector kit is a replacement for the engine harness side connector that attaches the main harness to the throttle body sub-harness. A complete kit contains: 1 connector with lock G11 6 red seals A51 6 contacts B35

    $17.95

  • Trim connector

    Karel Tuning Trim connector

    Trim connector, engine harness side. For Yamaha Waverunners with electronic trim.   A complete kit contains 1 Connector N01 3 seals A53 3 contacts + 1 spare B36

    $14.95

  • Voltage regulator charging harness for Yamaha WaveRunner 18+

    Karel Tuning Voltage regulator charging harness for Yamaha WaveRunner 18+

    5 in stock

    This harness connects to the voltage rectifier on Yamaha GP1800 and FX models 18+. It provides stable amperage and a clean installation. It works with our main harness and connects directly to the battery.

    5 in stock

    $45.95

  • Yamaha accelerator pedal connector kit (New style)

    Karel Tuning Yamaha accelerator pedal connector kit (New style)

    Yamaha 1.8L waverunner accelerator position sensor (APS) connector kit for newer style GP1800 and other models. Fits all Yamaha waverunner models with the newer integral pedal position sensor on the steering wheel. A complete kit contains 1 APS Connector K12 9 seals A61 10 contacts B35

    $19.95

  • Yamaha air temp connector

    Karel Tuning Yamaha air temp connector

    10 in stock

    A complete kit contains 1 Connector L6 2  seals A57 2 contacts B16

    10 in stock

    $8.95

  • Last stock! Yamaha Gp1800 2017-2022 main harness, Fueltech FT550

    Karel Tuning Yamaha Gp1800 2017-2022 main harness, Fueltech FT550

    2 in stock

    This harness completely replaces the OEM harness, ECU and fuse panel in the Yamaha WaveRunners GP1800 models from 2017-2022. We have perfected this design through years of racing and development. Completely waterproof when used as recommended and slim design packed with many features like: Plugs to a Fueltech FT550 latest generation programmable ECU 4 primary injectors + 4 additional already in the harness (Used with our additional injector harness) Boost control solenoid output Ride control (Reverse) Trim control Bilge pump Nitrous solenoid control Nitrous bottle pressure Oil pressure monitoring with adapter harness Tunnel pressure monitoring via adapter harness  Compatible with OEM DBW throttle body. Compatible with Bosch throttle body via adapter harness GPS input ready Compatible with high impedance injectors only Connects directly to a Nano wideband controller for use with LSU 4.2 sensor 1 Year limited warranty against manufacturing defects. CAN bus expansion port for EGT or other Fueltech accessories. External waterproof crank signal resistor easily changed for ultra-high RPM engines Our harnesses have been winning races and setting records since 2011 and are a tested product. They come completely sealed with the basic functionality but can be easily expanded using our plug and play adapter harnesses in order to connect to any sensors the end user requires. Full documentation and pinout is provided for easy troubleshooting as well as a complete catalog of every connector, contact and seal on our website. We provide a base map with the purchase of every harness. For applications that require additional functionality than what the base harness comes with, we recommend purchasing the correct adapter harnesses as well. (Does not include ECU and Nano Wideband, sold separately) Note: This harness completely eliminates the OEM display. Since the fuel level sensor is connected to the OEM display, it is up to the end user to reuse the fuel level connector and wire it up to our harness using the supplied connector pigtail.

    2 in stock

    $2,995.00

  • Yamaha Gp1800 2017-2022 main harness, Haltech S2 - Gen2

    Karel Tuning Yamaha Gp1800 2017-2022 main harness, Haltech S2 - Gen2

    3 in stock

    This harness completely replaces the OEM harness in the Yamaha WaveRunners GP1800 models from 2017-2022. We have perfected this design through years of racing and development. Completely waterproof when used as recommended and slim design packed with many features like: Plugs to a Haltech Nexus S2 latest generation programmable ECU Boost control solenoid output Ride control (Reverse) Trim control Auxiliary fuel pump support Bilge pump Compatible with OEM 2021+ dash and Haltech dash Nitrous solenoid control Nitrous bottle pressure Oil pressure Oil temperature Tunnel pressure monitoring via adapter harness  Rotary trim input Auxiliary switch input Compatible with OEM DBW throttle body. Compatible with Bosch throttle body via adapter harness Knock sensor control Flex fuel sensor ready GPS input ready Can drive any type of injectors without any additional drivers. Traction control and torque management Rolling launch Compatible with both Bosch and NTK wideband sensors Ability to change 4 boost maps and 2 throttle feel maps directly from the OEM dash by using the original cruise control feature. 1 Year limited warranty against manufacturing defects. CAN bus expansion port for EGT or other Haltech accessories. These harnesses have been winning races since 2011 and are a tested product. They come completely sealed with the basic functionality but can be easily expanded using our plug and play adapter harnesses in order to connect to any sensors the end user requires. Full documentation and pinout is provided for easy troubleshooting as well as a complete catalog of every connector, contact and seal on our website. We provide a base map with the purchase of every harness. For applications that require additional functionality than what the base harness comes with, we recommend purchasing the correct adapter harnesses as well.    

    3 in stock

    $2,995.00

  • Yamaha WaveRunner fuel pump connector

    Karel Tuning Yamaha WaveRunner fuel pump connector

    9 in stock

    A complete kit contains 1 Connector M12 3 seals A53 2 contacts B34

    9 in stock

    $9.95

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