FIM 853 Chip

[dukegar]

Hello zillers. Just got my FIM chip and would like to get some tech know-how from you guys.

Do i just plug the new one in after removing the old one? I'm asking because of the difference between the two.






Above are pics of the chip. TIA.

[boostedt0y]

Yes just plug it in and ride!

[duckracer]

it is plug and play, you may have to adjust the trim a bit. And make sure you install it with the notch on the end of the chip matching up with the notch on the socket. It can be installed backwards, but the bike won't start.

[dukegar]

Thanks guys.

I will install the chip after work today and let you know what happens.

[dukegar]

Well I'm back and now that I've installed the 853 chip my bike will not start. Oh BTW it starts with the old chip in.

Some background: Bike is all stock except for the 853 big bore kit. All stock!

Events: What I did so far. After the chip switch.

1. Ignition is on
2. Hear pump prime up and pump won't stop priming.
3. Turn off switch.
4. Turn switch on again. Pump not priming. Tried to start engine- no go.
5. Turn switch off for about 2-3 minutes
6. Turn switch on again. Hear pump priming-does not stop priming again. Tried to start engine while pump is priming. Does not start. After I stop trying to start it the pump also stops priming.
7. Turn off switch again.

So what gives? any help is appreciated. TIA.

[huit]

Did you remove the chip off of the board?
Yea I know stupid question but mine did the same thing!Because I took if off the board!
paul

[dukegar]

huit - yes I did accidentally. I put the chip in first time and it wasn't lined up properly. So I had to remove it and that's when it pop from the board. Got it out and put it back together. Put it back, lined up correctly and no start.

how did you fix it?

[Shazaam!]

I'm fairly certain the chip or the circuit board/chip assembly is installed backwards.

The signal to start the fuel pump comes from the EMS computer. In the past, same people who changed their eprom chip made the mistake of putting the new chip in backwards and the clue was that the fuel pump wouldn't start afterwards. You might also check that the chip is seated properly and none of the pins were bent.

Caution: Wait 15 Seconds

One thing to be aware of is that you can damage the 1.6M computer if the EPROM is pulled while the unit is still powered up. The 1.6M controls it's own power supply so when you turn off the ignition switch, the ECU stays powered for about 15 seconds while it does some housekeeping. If you try a chip swap without waiting 15 seconds, the ECU will never re-boot properly and sometimes it fries the coil drivers.

[huit]

I reassembled the two and away it went!
lucky after reading the above post!
paul

[dukegar]

Huit - Thanks.

Shazaam - So, do I reassemble the chip (top part) with the words facing the metal prongs on the outside? Pic 18297.

or do I install the whole chip backwards on the ecu? words facing the back of the bike.

Thanks for the help guys.

[Shazaam!]

The chip should be assembled to the lower circuit board just like you originally received it. The entire assembly should be rotated 180 degrees and inserted into the computer.

If you notice, there's a small half-circle notch on the short end of the 748 chip and an identical notch on the upper chip of the FIM assembly. In your picture, the notches are on the opposite ends telling you that the writing on the FIM label will opposite that of the writing on the 748 chip when correctly installed.

Said another way, the notch will be on the same side of the bike as before.

[dukegar]

shazaam,
I see the notches and they are on the opposite end like you said. I will rotate the fim chip 180 degrees and install it that way.

I'll work on it and give you the info domani.

Thanks for the help.

[dukegar]

Just to give you guys an update!

I turned the chip 180 degrees like Shazaam said and it WORKED Took it out for a ride and

Thank you all for your help. Now, I guess the next thing is to get it tune properly. Again, Thanks!!

[Ducaholic]

Ah, another happy 853! I myself have a 872 with the 853 FIM Chip. It's amazing how the big bore kit lightens the front wheel.

[dukegar]

Ducaholic = True that!! Truly is a big change from the stocker. Now, all I gotta do is take it to be tuned properly. gotta save more mullahs!!!!

[Ducaholic]

Get 'er done and speed safe.

[viper1]

Just IM'd ya

[Old Baldy]

Are you guys running the 748 Throttle bodies on your 853s or the bigger 916/996 TBs?

(I have a pair of 996 TBs if you're interested...)

[huit]

Ihave been running stock tbs.
paul

[CrimsonCloak]

I thought I was running stock 748 TB's but I bought a pair of 916 TB's and they were the same size as mine. Is 50mm the 748 size or the 916 size?