Another John Gemi chip thread

PapaHayd

PapaHayd

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Picked myself up a John Gemi Stage 15 Chip, awaiting delivery (y)

I’m hoping it comes with instructions however I’m hoping the UKGSer folks can help.

To the hive mind who have fitted said chips, is it possible to install on an 02 GSA without taking off the tank? ABS has been deleted.
 
Not possible without removing the tank and the ECU and pulling the ECU apart. Not difficult if you’re not a numpty……..
 
Mad Hatter said:
Not possible without removing the tank and the ECU and pulling the ECU apart. Not difficult if you’re not a numpty……..
Click to expand...
ECU… that sounds more electrical than what I like. And I’m an electrical numpty 😂

Time to break out the Clymer manual.
 
It’s honestly not that hard you just need to be careful. I don’t have a link but I’m pretty sure that there are some online fitting instructions knocking about
 
the basics are,take both fairings off,remove the tank,and the plastig glove box on the lhs,disconect the battery,then take the 4 screws that hold the ecu in place.take the ecu in the house,remove the 4 torx security bolts and run around the edge of the ecu with a stanley knife blade not going in to far or you will hit the circuit board inside.
remove the plastic cover and pull out the old chip,
then just do everything in removal to put it back together using a bit o silicone sealer when you rejoin the ecu back together.
 
fizzer said:
the basics are,take both fairings off,remove the tank,and the plastig glove box on the lhs,disconect the battery,then take the 4 screws that hold the ecu in place.take the ecu in the house,remove the 4 torx security bolts and run around the edge of the ecu with a stanley knife blade not going in to far or you will hit the circuit board inside.
remove the plastic cover and pull out the old chip,
then just do everything in removal to put it back together using a bit o silicone sealer when you rejoin the ecu back together.
Click to expand...
And don’t forget the Chip only fit ONE WAY.
From memory, the little “Nick” needs to be on the left. Be super careful all the PINs line up.
Good luck. :popcorn
 
PapaHayd said:
Picked myself up a John Gemi Stage 15 Chip, awaiting delivery (y)

I’m hoping it comes with instructions however I’m hoping the UKGSer folks can help.

To the hive mind who have fitted said chips, is it possible to install on an 02 GSA without taking off the tank? ABS has been deleted.
Click to expand...
Looking for a contact for John Gemi that isn't Facebook or Instagram as I don't have or want any social media platforms. Anyone have another contact, email , phone number or WhatsApp group.
Got an overweight r1150 GS that would benefit from a foot up it's arse .
 
Is Gemi still scamming people or did he fix the reversion to stock AFR?
 
Last edited:
BMW Bomber said:
Wasn't aware of him scamming anyone , I've only read hundreds of good reviews, has anyone you know had issues?
Click to expand...

A few years ago Roger04RT proved the chips at the time via monitoring the output of a wide band lambda sensor that the the initial enrichment after a couple of hundred miles reverted to stock AFR as the ECU compensated. I seem to recall he detailed and discussed his findings on the old forum.

At the time I seem to recall he refused to accept proof his chips were short lived. Maybe he cracked the coding but I went afxied after trying one.
 
No complaints from me - I’ve done a few thousand miles with my JG chip and it’s as effective as it ever was. A custom map in a chip can’t “revert to stock”. The custom map doesn’t just enrich the mixture either as you seem to imply.

Are you sure you’re not confusing replacement chips with the far more crude ‘fuel enrichment devices’ that sit outside of the ECU? Maybe you could post a link to the ‘proof’.
 
Yeah, after two or three tanks the benefits of the chip seem to disappear in my experience - really noticed this after putting the bike back on the road at the beginning of the month (battery was disconnected over winter). Pity, cos it's bloody lovely while it lasts.

Roger04RT reckons the Motronic learns that something has changed and correct things, although this might be debatable with open loop non cat bikes.

I've just changed mine back to standard today as my bike disgraced itself in hot conditions with low octane Bolivian fuel - I suspect that the Gemi chip couldn't cope, but I may be wrong but I don't want it happening again.
 
You wouldn’t expect any performance remap to a system as crude (by modern standards) as the injection on an 1150 to still cope with crap fuel. There’s a reason why there’s a CCP to go with the standard chip to switch to a map for lower quality fuel - it’s not clever enough to detect it automatically. An aftermarket chip or remap that pushes the limits of fuelling and ignition timing a bit more than standard won’t offer that.

As for the claimed/perceived performance drop what is going to degrade? It’s the chip that governs fuelling (target AF ratio) and timing and the map won’t change with time or miles. Although people cleverer than me may convince me otherwise.
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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