Latest revision as of 19:48, 5 April 2026

Basics

S3 EFI
An Electronic Fuel Injection System Developed by Robot Cantina (YouTube Channel) / Jimbo that is based off of the Bosch CIS System
- It is somewhat in-between a “dumb” Carburetor system, and a modern “smart” system like a Speeduino with tons of sensors / Dual Injection etc
Low Complexity/Points of Failure, but just smart enough to work reliably is the design goal
As per3:36 in the video,
It DOESN’T HAVE:
- A Crankshaft Position Sensor
- A Throttle Position Sensor
- An Air Intake Temperature Sensor
- Oxygen Sensor
  - This MAY be useful enough to add in in their opinion
It DOES Have:
- A Manifold Absolute Pressure Sensor
- A Thermal Time Switch ( Thermal Fuse ? ) for Cold Start detection+adjustments
- A Delay Based Startup Enrichment
The stock Carburetor is kept as a Throttle Body
- Unless you want to remove that restriction and use a dedicated throttle body and Port Fuel Injection etc
  - This also keeps the stock Governor (Small Engines) + Governor Linkages in use
As per S6 Ep8 18:00 while it CAN run with it spraying gasoline ahead of the carburetor, this is less than ideal due to it pooling up etc
ASA (Plastic) is used

An Amazon Listing for the Kohler EFI Fuel Pump Module ( ~57 USD as of this edit’’’ )
- As per 5:38 in the video, you are not supposed to gravity feed these pumps
- It needs a Diaphragm Pump based low pressure pump to go from fuel tank to it’s low pressure fuel inlet

An Amazon Listing for “GY6 Clone” ( ‘’’~28 USD as of this edit’’’ )
- ” Perfect Fit: Designed as an OEM replacement, this RedCap fuel injector provides a precise fit for Jonway GTX 250, Cougar Cycle Clash Force 200 EFI, Gator 200-Tank, and other scooters or motorcycles with XMT 250 EFI GY6 168cc, 170cc, and 200cc engines, ensuring seamless integration and reliable performance.”
- Mentions EV1 Fuel Injector style wire connections?

@@ Line 15: / Line 15: @@
 **A [[Thermal Time Switch]] ( [[Thermal Fuse]] ? ) for [[Cold Start]] detection+adjustments
 **A Delay Based Startup Enrichment
+*The stock Carburetor is kept as a [[Throttle Body]]
+**Unless you want to remove that restriction and use a dedicated throttle body and [[Port Fuel Injection]] etc
+***This also keeps the stock [[Governor (Small Engines) ]] + [[Governor Linkages]] in use
+*As per S6 Ep8 18:00 while it CAN run with it spraying gasoline ahead of the carburetor,  this is less than ideal due to it pooling up etc
+*[[ASA (Plastic)]] is used
 =Components=
@@ Line 27: / Line 32: @@
 ==Fuel Injector==
 *[https://a.co/d/03cRXdle An Amazon Listing for “GY6 Clone” ] ( ‘’’~28 USD as of this edit’’’ )
+**” Perfect Fit: Designed as an OEM replacement, this RedCap fuel injector provides a precise fit for Jonway GTX 250, Cougar Cycle Clash Force 200 EFI, Gator 200-Tank, and other scooters or motorcycles with XMT 250 EFI GY6 168cc, 170cc, and 200cc engines, ensuring seamless integration and reliable performance.”
+**Mentions [[EV1 Fuel Injector]] style wire connections?
 ==Electronics==