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Old 10-14-2014, 09:35 PM   #1
WileCyot
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1983 CB1100F Fuel Injection Build

Well, I figured I would post in here my plans. Everyone likes a good build thread and I'd like to get one started.

The bike....

IMG 2493 zpsc39d359b

So far I've ordered a set of 01-03 GSXR 700 throttle bodies, injectors, fuel rail, harness, etc. Once those come in I will get them setup to fit the 1100F spacing in place of the carbs. I have a spare 900F motor that I'll use for mocking up.

Anyone know of an in-line fuel pump for a motorcycle that doesn't draw a high amperage? I'm really going to have to pinch pennies so to speak in the electrical department. All lights on the bike will be converted to LED and the headlight to an HID retrofit. The initial startup will draw a large hit from the system but then drop to around 3-5 amps. Hopefully some of you can provide some input into all of this.
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Old 10-14-2014, 09:42 PM   #2
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What are you going to use the control the fuel system?
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Old 10-14-2014, 09:53 PM   #3
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Quote:
Originally Posted by Patrick View Post
What are you going to use the control the fuel system?
Either a megasquirt or microsquirt system. Probably a microsquirt because that's all I need. It has a Dyna2000 ignition system but either of the above options can also control ignition. Just have to decide and pull the trigger.
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Old 10-15-2014, 07:56 AM   #4
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I can't wait to see how this goes. I've never seen anybody attempt to inject a carbed bike, if it works outi may have to try it someday.
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Old 10-15-2014, 08:31 AM   #5
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I have no doubts it will work, very cool mod and I'm in !
Might as well toss on a small turdblo while your at it.
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Old 10-15-2014, 08:41 AM   #6
Jae
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Quote:
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I can't wait to see how this goes. I've never seen anybody attempt to inject a carbed bike, if it works outi may have to try it someday.
It's been done (recall specifically seeing a guy adapt carbs to accept fuel injectors on a vmax), it seems that it's usually pretty expensive though. I think this is the main thing that has kept people from doing it more.

But yeah, I'm really interested in hearing how this goes.
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Old 10-15-2014, 09:59 AM   #7
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As of now I'm in $110 bucks for the TB, injectors, and harness. I'll keep this updated as I make progress.
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Old 11-07-2014, 12:13 PM   #8
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Alright, so I've been gathering up parts for my EFI conversion. I've decided that, for the time being, to only use the megasquirt for fuel control. I have a DYNA 2000 ignition that's working quite well for now. Once I get the fuel headed in the right direction and get a grasp on the tuning I'll probably purchase a MS3X box to have fuel sequential fuel and COP spark control. All in due time. For now, let's keep it simple.

Here are some pictures of the 01 GSX-R 750 throttle bodies I've modified to fit the spacing for the bike. The ITBs come with 80-80-80 spacing. I need 80-100-80. I, like others on this board have done, moved the TB that has the cable mechanism in-board so it sits next to the TB with the TPS. TPS is at at CYL 4, throttle mechanism is at 3, and the other two sit at 1 and 2, obviously.

In order to be able to actuate the butterfly valves with the cable mechanism I pulled the bridge piece off of the TB sitting on Cyl 1, since it won't be needed as it is hanging out in space, bent the spring hook, and fastened it under the nut of the cable mechanism. All of this should be visible in the pictures below. I had to bend the mechanisms at the 100mm spacing a little so they would contact as designed. All in all it worked out pretty well. For the spacers I picked up some 1" Nylon threaded spacers with a 1/4"-20 threaded down the middle of them. I tapped the TPS throttle body to 1/4"-20 and used 1/4" threaded rod with 2 nuts and washers on the #1 TB end. Looks decent other than needing to cut the extra length off. I'll do that soon. For now, pictures.

I also need to either extend my fuel rail or purchase some stock. Stock looks pretty cheap so I may just go that route.

IMG 2386 zps75b03d48

IMG 2384 zps89341e6d

IMG 2385 zps2b16eabe

IMG 2383 zpsd9c7aec8

IMG 2379 zpsdd5555e3

IMG 2382 zpse199ac78
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Old 12-23-2014, 08:52 PM   #9
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Quote:
Originally Posted by Jae View Post
It's been done (recall specifically seeing a guy adapt carbs to accept fuel injectors on a vmax), it seems that it's usually pretty expensive though. I think this is the main thing that has kept people from doing it more.

But yeah, I'm really interested in hearing how this goes.
Ditto.... there are some guys that have done it on V4 Hondas..........
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