Compared to other Small Engine EFI kits of us, this is a comparatively "large" engine EFI kit. It is designed to convert some carburetor engines of 400cc to 800cc range. Because of larger displacements, everything (almost) needs to be larger size; namely larger fuel pump, larger fuel injector, larger throttle body (42mm); etc. Besides, this 42mm throttle body comes with an idle control motor built-in. This kit makes it easier for those who still own a carburetor engine in the 400cc to 800cc range, and want to convert it to fuel injected. Same as other kits of ours, this one is easy to install and tune. The key is to make sure your carburetor can be replaced by the 42mm throttle body. Or you may need to machine a spacer. This kit has all the features of the smaller EFI kits, like self-tuning capability. This kit by default will run 1-cylinder engine. For 2-cylinder engines, like V-twin, or parallel twins, more modifications are required, in many cases, a new manifold or new throttle body set will be required. contact us for details.
News: We now have 38mm, 42mm, 45mm, 50mm, 55mm, 60mm, and 65mm throttle bodies to fit different size engines. Note, only 42mm throttle body has been customzied for certain bikes like Suzuki DR650. For other throttle bodies, you may need to do some mechanical adaptations.
Note: for DR650, the motor is running better with a little rich AFR in some cases, like idle, and WOT.
This EFI kit has below features:
• Electronic fuel injection (EFI)
• ECU controlled ignition system (via CDI)
• Close-loop controls with an O2 sensor
• Dual fuel maps selectable by a manual switch (Performance Switch: ECO vs. RICH Mode)
• High fuel efficiency and low carbon emissions
• On board self-diagnosis with a MIL lamp
• Performance tuning for advanced users
1.ECU (aluminum housing, full water proof, and EMI* proof)
2.Harness (including the connectors, waterproof)
3.Throttle Body with injector mounting Assembly
• 38mm/42mm/45mm/52mm Throttle body (including TPS sensor)
• Idle Air Controll (IAC)
• large Fuel injector (190g, 240g/min)
4.Fuel pump assembly
• large Fuel pump (Flow rate: 45L/h,120L/h)
• Fuel pressure regulator(3bar)
• Fuel filter (metal housing)
• fuel hoses and clamps
5.MAP sensor (1.05bar)
6.Engine temperature sensor
7.Intake air temperature sensor
8. Ignition controls - for ECU controlled spark advance (optional, NOT included)
9.Oxygen sensor and bungs (INCLUDED)
10.Serial communication cable (to a computer)
11.Serial to USB converter (included)
12.CD - free tuning software (also downloadable)
13. Easy to upgrade to a turbo version (2.5bar MAP sensor, and larger injectors
*EMI: Electro-Magnetic Interference. Without a metal case, ECU is susceptible to the EMI noise, and can behave erratically, and even dangerously. Especailly for side-by-side racing, your ECU can be interfered by the EMI noise right from your competitor next to you.
This kit may require some tuning, depending how special is your engine. The tuning is easy and we have a easy to follow tuning guide. (via ProCAL tuning software).
Below: 42mm Throttle Body with an adaptor and injector mount
Click the pictures for dimensions
Below: 38mm Throttle Body with injector mount
Click the pictures for dimensions
For more throttle bodies and intake manifolds, please contact us!
400cc to 800cc EFI kit @ $699 USD
Note: single cylinder kit price, contact us for 2-cylinder ones