Convert Carb to EFI - What One Needs

jezzrite · 09-17-2016, 06:01 AM

Okay, first of all, for those who gonna say "play with the jets", "carb is simpler", and things like that, I would like to thank you for your opinions, and I appreciate it.

For me, EFI is much simpler than carburetor because of much lesser moving parts of the former and the ease of use (no mysterious jets!)

For the purpose of this discussion, I would like your help to list the items needed for one to convert carburetted RX3 (prevalent in most of South East Asia nations, except for Thailand), to an EFI-equipped RX3.

And hopefully these items are easy to find at TaoBao.

1. EFI complete wiring.
2. Fuel pump.
3. New fuel tank that can accommodate the fuel pump.
4. Oxygen sensor.
5. Fuel injector.
6. ECU.
7. Rectifier.
8. EFI Throttle body.

Anything else I missed?

bogieboy · 09-17-2016, 07:56 AM

this may be consiiderably easier and cheaper alternative.... I keep eyeing it for my roketa....

http://www.ecotrons.com/products/sma...injection_kit/

katflap · 09-17-2016, 08:30 AM

A few things come to mind

1/
Thermostat housing,
the EFI housing comes with 2 sensors, one for the temp gauge and the other is used by the ECU.

2/
I think the Ignition coil is different (2 pin connector)

3/
possibly a different throttle cable.

4/
Fuel pump relay, if it doesn't come with the EFI wiring

5/

Exhaust header pipe with the fitting for the O2 sensor

I think I have seen most of what you need on TaoBao

Good luck, I hope your conversion goes well

adriansk8 · 09-20-2016, 02:39 PM

here there is another full kit EFI

http://es.aliexpress.com/store/produ...3-02d90286d654

pyoungbl · 09-20-2016, 04:30 PM

Good find on that EFI kit. I notice that the kit is for 150cc, not sure it will be the same for the 250.

Azhule · 09-20-2016, 08:16 PM

Slightly bigger Injector, Fuel Pump and Throttle Body is all that will change for bigger cc bikes

pyoungbl · 09-20-2016, 09:46 PM

Azhule, you are probably correct....if the rest of the bike is the same. That's the unknown here. I'd also be concerned about the ECU and how it is programmed.

Jay In Milpitas · 09-20-2016, 10:00 PM

Quote:

Originally Posted by pyoungbl

Azhule, you are probably correct....if the rest of the bike is the same. That's the unknown here. I'd also be concerned about the ECU and how it is programmed.

Just keep the points gap on the low side of the spec, that increases effective dwell.

bogieboy · 09-21-2016, 09:49 AM

Here is one designed for a 250, also from the same seller...

http://m.es.aliexpress.com/item/1873299207.html

pyoungbl · 09-21-2016, 12:35 PM

To my aged eyes the photos posted look exactly the same...for 100cc, 150cc, etc. A close look at the cables shows they are coiled in exactly the same way. I would not trust the photos posted. With that said, if you can convert to EFI for $299 that's a screaming good deal and maybe worth taking a chance on. My one experience with Taobaotrends was very positive.

Peter Y.

bogieboy · 09-21-2016, 12:40 PM

I agree... I am really considering that kit, if the better half approves the purchase....LOL

09-17-2016, 06:01 AM	#1
jezzrite Join Date: Feb 2015 Location: Malaysia Posts: 33	Convert Carb to EFI - What One Needs Okay, first of all, for those who gonna say "play with the jets", "carb is simpler", and things like that, I would like to thank you for your opinions, and I appreciate it. For me, EFI is much simpler than carburetor because of much lesser moving parts of the former and the ease of use (no mysterious jets!) For the purpose of this discussion, I would like your help to list the items needed for one to convert carburetted RX3 (prevalent in most of South East Asia nations, except for Thailand), to an EFI-equipped RX3. And hopefully these items are easy to find at TaoBao. 1. EFI complete wiring. 2. Fuel pump. 3. New fuel tank that can accommodate the fuel pump. 4. Oxygen sensor. 5. Fuel injector. 6. ECU. 7. Rectifier. 8. EFI Throttle body. Anything else I missed? __________________ People sit on an exploding, volatile, fast-moving two-wheeled killer machine, and call it "enjoying the moment". No wonder aliens never make contact with us. -A Zong rider- Last edited by jezzrite; 09-17-2016 at 06:12 AM. Reason: Add number 8.
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09-20-2016, 08:16 PM	#6
Azhule Join Date: Dec 2015 Location: CO Posts: 1,525	Slightly bigger Injector, Fuel Pump and Throttle Body is all that will change for bigger cc bikes __________________ "Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P.
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09-17-2016, 07:56 AM	#2
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,045	this may be consiiderably easier and cheaper alternative.... I keep eyeing it for my roketa.... http://www.ecotrons.com/products/sma...injection_kit/
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09-17-2016, 08:30 AM	#3
katflap Join Date: Jan 2015 Location: England Posts: 382	A few things come to mind 1/ Thermostat housing, the EFI housing comes with 2 sensors, one for the temp gauge and the other is used by the ECU. 2/ I think the Ignition coil is different (2 pin connector) 3/ possibly a different throttle cable. 4/ Fuel pump relay, if it doesn't come with the EFI wiring 5/ Exhaust header pipe with the fitting for the O2 sensor I think I have seen most of what you need on TaoBao Good luck, I hope your conversion goes well
	1

09-20-2016, 02:39 PM	#4
adriansk8 Join Date: Oct 2015 Location: Medellin - Colombia Posts: 39	here there is another full kit EFI http://es.aliexpress.com/store/produ...3-02d90286d654
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09-20-2016, 04:30 PM	#5
pyoungbl Join Date: Feb 2016 Location: Portsmouth, Virginia, USA Posts: 632	Good find on that EFI kit. I notice that the kit is for 150cc, not sure it will be the same for the 250.
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09-20-2016, 09:46 PM	#7
pyoungbl Join Date: Feb 2016 Location: Portsmouth, Virginia, USA Posts: 632	Azhule, you are probably correct....if the rest of the bike is the same. That's the unknown here. I'd also be concerned about the ECU and how it is programmed.
	1

09-21-2016, 09:49 AM	#9
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,045	Here is one designed for a 250, also from the same seller... http://m.es.aliexpress.com/item/1873299207.html
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09-21-2016, 12:35 PM	#10
pyoungbl Join Date: Feb 2016 Location: Portsmouth, Virginia, USA Posts: 632	To my aged eyes the photos posted look exactly the same...for 100cc, 150cc, etc. A close look at the cables shows they are coiled in exactly the same way. I would not trust the photos posted. With that said, if you can convert to EFI for $299 that's a screaming good deal and maybe worth taking a chance on. My one experience with Taobaotrends was very positive. Peter Y.
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09-21-2016, 12:40 PM	#11
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,045	I agree... I am really considering that kit, if the better half approves the purchase....LOL
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