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Carb to Fuel injection swap

673 Views 15 Replies 9 Participants Last post by  iXXion
Hi all!!

I have the oportunity to buy a 2001 XX for cheap price, but the bike is without documentation or decommissioned. So Im start thinking on fitting all her Efi stuff to my 97 carbed XX. Is this worth it? I dont know if there is a lot of difference between this efi model bird and my carbed, fuel consumption, power.....
The only reason to make this conversion is to "modernize" mine because despite its 200.000 kms I dont have intention on selling or changing this motorcycle.
Does anyone make this conversion?
Thanks!!
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If it is really cheap, and mostly complete, then combine it with a good used FI frame with paperwork to make a complete FI bike.

What you are contemplating has too much cost/benefit. Not worth it IMO.
Thanks fizzy for your answer! There is possibility to register again the frame but it looks in bad conditions and then all the burocrathic things... Thats why Im thinking fitting all in mine. The only cost is the efi bike, the parts I could need and my hours working on it.
having owned a '97 carbed and '00 & '01 injected bikes, i can say they're pretty close in terms of power / delivery.

after a full exhaust and tuned jet kit install, the '97 was better down low.

both injected bikes may have had a bit more at higher speeds (ram air?). the '00 was stock, my current '01 has slip-ons, the o2 sensor and pair valve delete and ironically, feels the slowest of the 3... i've read after '00, a different ignition rotor retarded the timing a bit.

keep your '97 tuned, it's already among the best!
Thanks ptxyz!!
a very helpfull answer! Im so happy with my 97 unit, I have it with ohlins in rear, hayabusa front end with radial calipers, brembo rcs 19 master cylinder..... And the engine is totally stock but I love it. The thing is that like in all parts your enviroment buys new motorcycles and tells like yours is too old and not reliable.... Im not agree but it pushes you to watch alternatives. A time ago I was thinking on changing the bike and I tested Kawasaki gtr, Ducati MTS 1200, Trimph Tiger 1200 and 1050, Bmw rt 1200, Yamaha tracer 900..... And maybe people is dont think like me but I didnt found anything more satisfiying than the XX.
So when the 2001 bird option appears I think It can be good option. Is true that once I tested a 2004 bird and I find it a bit sweeter than my carbed, but I like more the carbed roughness and power delivery. And if Im not wrong consumption is very similar....
I think I will stay like I am.
Good idea.....you can be sure there are differences that only the designer's would know about.
I would start by going somewhere like CMSSNL.COM and looking at the parts fiche. This should give you, part by part, what has changed, what has stayed the same and what is interoperable. You can focus on fuel system, electrical harness and dashboard. You can ignore the stickers. ;-)

If you have the patience, it should be just a matter of stripping both bikes down and looking very carefully.

Motorcycle wiring looms are pretty simple once you get them undressed, and the tools to make factory quality wire-by-wire changes in connectors aren't expensive or difficult to use. Many of the connectors are available as standalone parts. I rejuvenated my (somewhat older) Honda from "should I scrap it" behaviour to factory fresh behaviour (electrically) just by methodically refreshing corroded spade connectors.

I am presuming the injectors don't deliver into the cylinder head, and so it would be airbox, throttle bodies, ECU, dash. Depending on how trick you're feeling, you may be able to graft the FI light into your existing analogue dash with a little daughter board.

I wouldn't listen too much to the nay-sayers but would definitely start at CMSNL. Build yourself some kind of side-by-side columns in a spreadsheet and make a complete add/delete list. I suspect that having a complete fuel injection bike available to you means it's more about time than money.
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Kind of reminds me of my 30 year old hammer. I have changed the handle twice and the head once. It is still the same hammer.
I would start by going somewhere like CMSSNL.COM and looking at the parts fiche. This should give you, part by part, what has changed, what has stayed the same and what is interoperable. You can focus on fuel system, electrical harness and dashboard. You can ignore the stickers. ;-)

If you have the patience, it should be just a matter of stripping both bikes down and looking very carefully.

Motorcycle wiring looms are pretty simple once you get them undressed, and the tools to make factory quality wire-by-wire changes in connectors aren't expensive or difficult to use. Many of the connectors are available as standalone parts. I rejuvenated my (somewhat older) Honda from "should I scrap it" behaviour to factory fresh behaviour (electrically) just by methodically refreshing corroded spade connectors.

I am presuming the injectors don't deliver into the cylinder head, and so it would be airbox, throttle bodies, ECU, dash. Depending on how trick you're feeling, you may be able to graft the FI light into your existing analogue dash with a little daughter board.

I wouldn't listen too much to the nay-sayers but would definitely start at CMSNL. Build yourself some kind of side-by-side columns in a spreadsheet and make a complete add/delete list. I suspect that having a complete fuel injection bike available to you means it's more about time than money.
Thanks for your answer! At moment I will stay like Im but in case of making the conversion I was thinking on making what you said.
So Im start thinking on fitting all her Efi stuff to my 97 carbed XX. Is this worth it?
There is one small but significant difference for mix and matched swaps that has to be considered.
The EFI runs a knock sensor in the block, the carbie didn't.
Not an issue if the swap is engine + electronics but you can't mix and match here.

The tanks are obviously different, the FI was larger and contained the fuel pump.

In addition, the carbie had a sidestand warning light, the FI didn't this warning light became the Fi light, not an issue although it could become confusing.
There is one small but significant difference for mix and matched swaps that has to be considered.
The EFI runs a knock sensor in the block, the carbie didn't.
Not an issue if the swap is engine + electronics but you can't mix and match here.

The tanks are obviously different, the FI was larger and contained the fuel pump.

In addition, the carbie had a sidestand warning light, the FI didn't this warning light became the Fi light, not an issue although it could become confusing.
So could carby head be put on a FI
Reason I ask is I may have a line on a carby that's been port flowed.
So could carby head be put on a FI
Reason I ask is I may have a line on a carby that's been port flowed.
Not sure. Would need to compare the carb/inj stubs on the head for starters.
Just checking the parts fiches I note the head gasket numbers are different
12251MAT003 (taken from random carbie)
12251MATE01 (taken from a random 2002 inj)
Head gaskets can be different but still work. I'll have get a look at some pics off ebay. I'm suspecting they are different.
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Hi all!!

I have the oportunity to buy a 2001 XX for cheap price, but the bike is without documentation or decommissioned. So Im start thinking on fitting all her Efi stuff to my 97 carbed XX. Is this worth it? I dont know if there is a lot of difference between this efi model bird and my carbed, fuel consumption, power.....
The only reason to make this conversion is to "modernize" mine because despite its 200.000 kms I dont have intention on selling or changing this motorcycle.
Does anyone make this conversion?
Thanks!!
Do the reverse think ...
Take serial number of the 97 and install them on the 2001 !

Envoyé de mon SM-S908W en utilisant Tapatalk
Do the reverse think ...
Take serial number of the 97 and install them on the 2001 !

Envoyé de mon SM-S908W en utilisant Tapatalk
Its not a bad idea! lol
Head gaskets can be different but still work. I'll have get a look at some pics off ebay. I'm suspecting they are different.
The carb and fuellie heads are different and do not interchange, although the bolt pattern to the block is the same.

Fuellies have better top end because of the functional ram air ducting.

JM, you can't just swap the fuellie bits onto your carbed bike. It's more like you would swap your rolling chassis onto the fuellie engine and control unit/accessories like wire loom and bits. You would change the rear fender to accommodate the ECU, and swap out the radiator and oil cooler as well. You will of course need a fuellie tank and fuel pump as well.

Your sidestand lamp would simply function as the FI light.
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