Bandit Alley

MODEL SPECIFIC => SUZUKI BANDIT 250 & 400 => Topic started by: MIAMIBANDIT on June 02, 2011, 12:14:16 PM

Title: carb - efi of a bandit 400
Post by: MIAMIBANDIT on June 02, 2011, 12:14:16 PM

I know i am  going to get  roast for this but.....i have a 93 bandit 400 and the carbs  frustration and finding parts  have become overwhelming!  So  I decided to  take a path not  walked often and  go efi on my bandit.

I will be using the  throttle bodies off the 03 gsxr 600 , inline  fuel pump and micro squirt ecu. what do you  guys think about this? I  seen a post on the  Kawasaki website where this  guy  efi a  Gpz 900 with  success and  went on to  turbo charge the bike.

Title: Re: carb - efi of a bandit 400
Post by: banditv on June 03, 2011, 06:45:19 AM

the throttle bodies are the easy bit.
having all the sensor inputs that the ecu requires and an ecu that can fire injectors at the revs that a bike pulls will be the hard part.
is it a fuel only ecu?
which is prob what you will want since the bike will be cdi ignition and controls itself.
it will take a lot of dyno time to tune as a bike engine is far more fussy about fuel mixtures than a car, and at 14000 rpm it will only take a second or so to turn a good motor into a big paper weight if its even just a wee bit lean.

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on June 03, 2011, 08:18:27 AM

http://www.kawasakimotorcycle.org/forum/projects-how-write-ups/95445-converting-1985-zx-900-efi.html

Title: Re: carb - efi of a bandit 400
Post by: canyonbreeze on June 03, 2011, 12:19:35 PM

I've thought of this project but figure it would be much easier and cheaper just to buy a FI bike.  One thing to check first on the B400 is if the stator and charging circuit can handle the requirements of the fuel pump that will be needed to give pressure to the injectors.

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on June 03, 2011, 03:21:00 PM

I will look into this. :yikes:

Title: Re: carb - efi of a bandit 400
Post by: JmuRiz on June 07, 2011, 04:27:43 PM

I've always thought microsquirt would be great on our little bikes.  Best of luck with the project, putting the ECU under the seat is a perfect spot for it.

Title: Re: carb - efi of a bandit 400
Post by: canyonbreeze on June 07, 2011, 05:39:37 PM

The microsquirt says it can control the coils.  Could the original igniter be done away with in this scenario?

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on June 08, 2011, 01:52:40 AM

Yes, megasquirt version 3.0

Title: Re: carb - efi of a bandit 400
Post by: Chris H on June 08, 2011, 07:18:46 PM

Take a look  at the guys work with microsquirt on the cbr400 at 400greybike, think his user name is PARIUS. he's got some videos on youtube and is pretty much up and running now.

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on June 17, 2011, 04:01:38 AM

I have the   gsxr throttle bodies in hand and because of  the frame  design of the  B4 the  TB's are too wide to  fit between the  frame in the same  orientation as the carbs.

It can  fit if you make  extended tube runners and push the tb's back in the  ait box area. so that is the other problem.

Everyday I am more and more tempted to  just pick up a  B6 parts are so  hard to find for the B4 and the  carb issue, :banghead: CDI issue and  hard starting issue is  driving me  nuts!!

I  got my  tank welded (rusty area cut out and replace with  fresh metal for  120 US here in Hialeah the  guy did a  fantastic job!!

He also welded a  hairline  crack in my engine cover for  20 bucks. All I have to do now is  prep and paint the tank and I am  go to  go on that part.

Title: Re: carb - efi of a bandit 400
Post by: interfuse on June 17, 2011, 08:51:15 AM

Someone else fit gsxr carbs. The same setup might work with the throttle bodies.

http://s354.photobucket.com/albums/r405/camarobantana/?action=view&current=bandit003.jpg&mediafilter=noflash

http://forums.banditalley.net/index.php?topic=11086.0

But it's probably much easier to solve your carb problem or buy another bike then go the efi route.

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on June 17, 2011, 09:19:09 AM

So i changed out all the capacitors on the  cdi as per write up, i have spark now but weak, like a really tine orange spark.... any advice on this? :shrug:

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on August 10, 2011, 02:17:08 PM

4 weeks later with a  new cdi box this bike wont start!! :banghead: :duh:

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on August 10, 2011, 02:18:47 PM

bought a  b6 with nasty carbs clean em and its up and running and the b4 still giving attitude

Title: Re: carb - efi of a bandit 400
Post by: Maniac on August 10, 2011, 02:27:19 PM

Bad coils can cause weak spark. Have you tested them?

Also, I've been musing about EFI on a bandit for the last few days. It's something try if you have too much time and money on your hands and need a project. I think it'd be pretty neat, honestly. :)

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on August 10, 2011, 02:59:58 PM

coil read nominal range according to factory manual

Title: Re: carb - efi of a bandit 400
Post by: Maniac on August 10, 2011, 04:43:38 PM

Wait, I just read back through. You had to replace the capacitors in the digital igniter box as well, and now you have weak spark?

Check the voltage regulator. This can lead to blown capacitors and could also cause the weak spark issue.

Title: Re: carb - efi of a bandit 400
Post by: MIAMIBANDIT on August 10, 2011, 04:57:36 PM

I willl change that out  as well so  far here is what has been  done


new  carbs
new cdi box
new plugs
new plug wires
new petcock
new tank
new carb boots
2 starter solenoids
new battery  9bs gel type

Title: Re: carb - efi of a bandit 400
Post by: nsc on January 30, 2012, 11:34:30 AM

Hey i just wanted to share this microsquirt EFI convertion a fellow Greek made on his B4.

http://www.msruns.com/viewtopic.php?f=93&t=23094