Fuel injected fj12 looooooooong term project

[Pheasantplucker]

I've been looking at the T Rex fj1200 race bike, bad move!
Then, I pick up a free Fj! A very rough free fj.
So, I started to chop it up straight away and fit whatever I had in the shed.
Did I say this was a long term project?

[fj1289]

Nice!  Like the subframe mods 

What TBs are those?   Mods to the rack?  Also looks like a bespoke fuel rail?

[Pheasantplucker]

Well.......
GSXR 600 k1 throttle bodies spaced apart in the middle, throttle mechanism moved to the middle because it hit the frame!
Throttle bodies turned down a little to make them a little easier to fit but still a little difficult to get on!
GSXR 600 pump mounting flange will be tigger into the bottom of the FJ tank, still not decided about trigger wheel but I'll be using all the Suzuki sensors, nice neat TPS is standard Suzuki.
Gsxr1000 k5 swingarm but I have a later 600 one to go in because the chain run will be better.
Modifying a xr69 seat to fit at the moment

[Pat Conlon]

Do you have a cam signal so as to run sequential injection, or do you plan on batch injection?
Which ecu are you planning?

[fj1289]

Very nice!

You can use the XJR trigger wheel.  24-2 if I remember correctly.   I have also used a ZX636 trigger wheel, but is requires a few mods and doesn't fit as neatly as the XJR wheel.  The ZX636 was a 24-1 wheel, but modifying it to 24-2 made starting easier and more reliable - especially if the battery wasn't 100% fully charged.

Also - depending on the ECU you want to use, it may work better to go with a Hall effect crank sensor vice the stock VR.   I've used VR with microsquirt, megasquirt3X and Holley HP ECUs.   The more I learn about VR sensors, the more I realize the need for application specific filtering.  I have had several instances of either hard starting or of ECU resets at high RPMs.  Some of these were difficult/impossible to discern when happening - and could be hard to find in the data logs - in retrospect I'm pretty sure a lot of the issues were related to the VR sensor.

Good luck!  Keep us posted on progress!

[Pheasantplucker]

Autotune Ecu looks favourite at the moment.
Don't think sequential will be an option as I don't think I'll fit a cam position sensor.
Looking at modifying a fz1 24-2 wheel but as this is my first attempt at injecting anything could happen.
Slight hiccup at the moment, just discovered the frame is bent at the headstock, I know the previous owner had a pelvis breaking argument with a car!
I have a 1TX that might now be the project bike!

[fj1289]

I'd really suggest the crank wheel from a fuel injected XJR - doesn't need to be modified at all.  Probably easier for you to get one than it is over here!

Well, hopefully that means you have a spare motor - work out the EFI issues on one, and build up the other into the fire breather once you have the basic tune sorted out!

I'm not familiar with the Autotune brand - that's usually a feature they boast.  Tried google - just found various ECUs that have the feature.  I'd like to check it out and see what it is and is capable of. 

[racerrad8]

FYI, I have the XJR efi rotors in stock.

Randy - RPM

[Pheasantplucker]

Thanks for the advice.
As I said this is all new to me, just seemed like a fun thing to do!
I have a Xjr rotor, somewhere, I've been planning for a while!
I must drag the other bike down from the barn over the weekend, back to work so not too much spare time.

[Pheasantplucker]

Just a thought!
Some of you have fitted injection, has anyone perfected a way of getting a good signal from a cam sensor?

[Pheasantplucker]

FYI, I have the XJR efi rotors in stock.

Randy - RPM

I have a rotor but i'm Short of a good onset front sprocket.

[Pheasantplucker]

I'd really suggest the crank wheel from a fuel injected XJR - doesn't need to be modified at all.  Probably easier for you to get one than it is over here!

Well, hopefully that means you have a spare motor - work out the EFI issues on one, and build up the other into the fire breather once you have the basic tune sorted out!

I'm not familiar with the Autotune brand - that's usually a feature they boast.  Tried google - just found various ECUs that have the feature.  I'd like to check it out and see what it is and is capable of. 

Autotune.fi a few on the old school Suzuki site have used autotune Ecu to good effect.

[Pat Conlon]

Just a thought!
Some of you have fitted injection, has anyone perfected a way of getting a good signal from a cam sensor?

The XJR uses a backbone frame, thus a cam sensor can fit....not so on our perimeter frame. The sensor housing runs afoul with the frame rail.
RPM used batch injection on their bike, as I think Chris also uses on his race bike.

[ribbert]

Just a thought!
Some of you have fitted injection, has anyone perfected a way of getting a good signal from a cam sensor?

The XJR uses a backbone frame, thus a cam sensor can fit....not so on our perimeter frame. The sensor housing runs afoul with the frame rail.
RPM used batch injection on their bike, as I think Chris also uses on his race bike.

Move the frame rail

[Pat Conlon]

Just a thought!
Some of you have fitted injection, has anyone perfected a way of getting a good signal from a cam sensor?

The XJR uses a backbone frame, thus a cam sensor can fit....not so on our perimeter frame. The sensor housing runs afoul with the frame rail.
RPM used batch injection on their bike, as I think Chris also uses on his race bike.

Move the frame rail

.......and the fairing?