Krash '21 + EFI programs and files

First see if you have a Haltech or Microsquirt ECU. It will say right on it and it is located in the left rear of the engine compartment on the tray wall behind the exhaust header pipe. Now download the corresponding software onto your windows based PC using one of the first 2 links below for your ECU brand. For other computer and phone options use the links from the MFG website.

Haltech
Follow the instructions in this column
Link to download free windows programs:
Haltech v2.59.3
Link from the MFG for all programs and updates:
Haltech

Microsquirt
Follow the instructions in this column
Link to download free windows programs:
Microsquirt / Tuner Studio v3.1.08
Link from the MFG for all programs, updates and options:
Microsquirt / Tuner Studio

Haltech Files, download if needed:
HDEF File
HFMP File
4-14-23 Original fuel map file
6-4-23 Fuel Map by JS Powersports
6-15-23 Fuel Map by JS Powersports
We ran 91 octane non ethanol, 76* water and 85* air. Ran again at 70* air temp and had some hesitation once in a while so we are going to richen up midrange and test again on 6-15-23
Remember you have to upload it to the ECU then reset the TPS then do a ECU restart (ctrl F12) Video

All Microsquirt ECUs should already be pre-programmed with the main controller file but just in case it isn't here it is: microsquirt-main-controller

Stock fuel map for dual injectior cylinders '21-'23 (#109)

Lean fuel map for dual injectior cylinders '21-'23 (#89)
This map is for freestyle riding on
Footrockets and FR Pros only!

Stock fuel map for '24 with single injector cyinders

Connecting

The Haltech will connect with a standeard USB to USB-B cable. The plug is under the screw off cap on the ECU. Standard cable vailable for $12, Special cable is $27 and needed if you have white potting in the connector preventing a standard cable from going all the way in. Use a mirror and flashlight to check.

Connecting

Data cable USB to serial

The Microsquirts take a special connector and harness that we custom make.

How to load new files and maping

Plug everything in like shown on our video then turn the ski power on and lauch the tuner studio program. There are a couple different ways to connect. Follow the instructions on the TPS calibration file below or from our unlisted video. Request a link (JS customers only)

If your computer will not connect to the ECU then you may need to down load the driver files for the data cable:
Prolific Driver files for USB to Serial port cable

Haltech TPS Calibration - must be set if installing a new ECU or new mapping file. ECU must be installed first.

Microsquirt TPS Calibration - must be set if installing a new ECU. ECU must be plugged into the ski and power turned on to work.

Operational Differences

Fuel pump primes when the power button is pressed.
Has a data logger.
Plugs in with a usb printer cable

Fuel pump only turns on when it sences RPM like when the start button is pressed and the engine turns over.
Does not have a data logger.
Requires a special data cable.

More info on our tech support and resources page

See the rest of our Krash Tech Videos Here