so this comes up once in a while... but... has anyone ever tried or even thought about the FI setup of the Ninja 650R? Does anyone know any specs off of the 650 as far as the TBs, It would seem depending on the sensors they used that it is the closest bike to a GS500 (cylinder count and engine design), The engine map might be similar and the rev limit is nearly identical...

Quote from: crzydood17 on February 23, 2012, 03:02:44 PM
so this comes up once in a while... but... has anyone ever tried or even thought about the FI setup of the Ninja 650R? Does anyone know any specs off of the 650 as far as the TBs, It would seem depending on the sensors they used that it is the closest bike to a GS500 (cylinder count and engine design), The engine map might be similar and the rev limit is nearly identical...

With the stock ignition mapping, it would probably work stock if you got all sensors and such.

Gotta think, they have to design it for max reliability, that includes the guy who don't change his air filter for 20k miles and chokes his motor.

Choked 650 would probably be close to a 500.

the beauty of FI is that it has a MAP and can adjust for A LOT of things... but, 75CC/cylinder isn't a huge diff in fuel, it might be a few tenths in AFR... hell it might allow for some timing adjustment a K&N and a Exhaust

I've always wondered how hard it would be to inject a GS. In terms of psyical parts you'll need throttle bodies(including injectors, fuel rail), air flow metres, oxygen sensors, a computer to run it, the wiring, and a fuel pump. I'm just going off memory here am
I missing anything? I'm quite confident it could be done, id be interested in how you get all the parts to fit.

CPS and CAPS are also important, who knows if the signals source-able from the current crank or not... Im not so interested in doing this if its super complicated... i would be interested if it was easy though... kinda like a bolt on thing, tap a few wires run a few hoses redo some vacuum that sort of thing. the TBs are the most important step, finding the right kind of TBs is the biggest issue... Most everyone knows that its possible with 750 TBs but takes modifications... if the 650 computer, throttle bodies, and most sensors connect up then that would make the rest of the build 90% easier... no fuel rails to modify and so on...



Edit:

So a little research had led me to find that the TBs on a 650R are 38mm I think that our carbs are 33-34MM, no one has great specs on these things...

i started this project, bought stuff, sourced parts and then sold the bike. why ? because i like riding more than wrenching.

bought a fuel injected bike, and am loving the incredible reliability of EFI (yamaha fz6). i would -not- tinker with fuel injecting a carburated bike, at this stage in life. reasons:

1) the gs carbs are very, very capable and have a very nice feel for commuting / twisties. this would be very hard to duplicate with STOCK EFI, let alone a home made, no engineers involved, efi.

2) it's cheaper, easier, faster, and BETTER to just buy a EFI bike. parts are plentiful, cheap, and ON THE SHELF or will be within a few days if you have to order them.

3) adjustment. there are maps, downloadable, and easily obtained to lean/rich, smooth/roughen up the mixture to whatever you prefer. it can be a race bike on saturday and a commuter again on monday, with only a map change.





gs (and tons of others) have been fuel injected before. just remember that winter is only a few months, and you'll want ot be RIDING come spring/summer instead of still sourcing high-dollar parts and spending countless hours tweaking the efi setup.

finally: i would buy another gs, in wrecked/exploded condition and fix it up to daily driver condition before i would invest in efi. even with all the problems i've had with carbs.

Quote from: ohgood on February 23, 2012, 04:59:45 PM
i started this project, bought stuff, sourced parts and then sold the bike. why ? because i like riding more than wrenching.

bought a fuel injected bike, and am loving the incredible reliability of EFI (yamaha fz6). i would -not- tinker with fuel injecting a carburated bike, at this stage in life. reasons:

1) the gs carbs are very, very capable and have a very nice feel for commuting / twisties. this would be very hard to duplicate with STOCK EFI, let alone a home made, no engineers involved, efi.

2) it's cheaper, easier, faster, and BETTER to just buy a EFI bike. parts are plentiful, cheap, and ON THE SHELF or will be within a few days if you have to order them.

3) adjustment. there are maps, downloadable, and easily obtained to lean/rich, smooth/roughen up the mixture to whatever you prefer. it can be a race bike on saturday and a commuter again on monday, with only a map change.





gs (and tons of others) have been fuel injected before. just remember that winter is only a few months, and you'll want ot be RIDING come spring/summer instead of still sourcing high-dollar parts and spending countless hours tweaking the efi setup.

finally: i would buy another gs, in wrecked/exploded condition and fix it up to daily driver condition before i would invest in efi. even with all the problems i've had with carbs.

Way to kill the mood with your practicality and sensible reasoning's! 

Yeah but of a buzz kill.

If ohgood hadn't I would probably have chimed in with the same sentiments eventually   

-Jessie

But....

with EFI, I could EASIALLY turbo it.

Done it on subarus and saturns, why not a gs?

hahaha

I was just hoping someone had looked at it and could just tell me I was retarded, so far it seems that new boots would be needed for the larger throttle bodys, I cant find any centerline spacing information...

Can it be done?  Probably

Is it worth the effort?  Probably not

-Jessie

Quote from: BaltimoreGS on February 23, 2012, 06:42:24 PM
If ohgood hadn't I would probably have chimed in with the same sentiments eventually   

-Jessie

sorry 'bout that guys.

efi, turbo, (why not twins?), water cool (hey now THERES A PROJECT!), and have fun.


just putting back some fun into the thread.

Good words from ohgood on riding rather than wrenching.  If you like wrenching then go for whatever you want to try, but have a running bike already.  Prime example is Tomb's build and how frustrating it can be.  If that's your 'only' bike you start to loathe the thing because, it will not be a trouble free, easy 1,2,3.  If you have a project bike on the side, you can ride, wrench, build-thread as long as it takes!  Back to fi, I'm totally for this idea on my next project.  600rr fi motors are easy to come by and seems like it'd be easy to put the set up into a GS frame.  Hey what's that,...http://houston.craigslist.org/mcy/2868218418.html no no, must, finish what I have first,.....