I would agree with what oldnfat has said. Had my AF-XiED units for over 10k miles now and still think they're great.
I've been down the sport headers and exhaust route and only could stick it for a few days. I found it too loud over any kind of distance and felt that there was more vibration. I felt that it moved the power further up the rev range with slight loss mid range. But that's only my opinion.
Much smoother, quieter and puncher on a stock system. But, whatever floats your boat.
Having tried an LC, I would say that with the AF-XiED, my TC is somewhere in between stock and an LC in terms of performance.
Was on a trip to the west coast of Ireland a couple of weeks ago and while overtaking a line of cars on a 50% damp road, the traction control kicked in at around 6-7k rpm. That'll do me!
Can't wait to get some miles on it now. My bike is Mistacats old bike so it's had them on before
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Ok time for an update. Now been running for about 4K miles....and still loving the impact these units have had.
Having run 1200GS bikes for 8 years now, it has been interesting to see the impact running the AF units have had elsewhere. When I put the units on I took the opportunity to polish my standard headers back to new (bluing and all other imperfections polished out).
4K miles later I have a slight straw colour on the top part of the headers but other than that no other discolouration at all.
No time at all....it already exists....go to Nightrider.com and check it out. £165 I believe.
Ok time for an update. Now been running for about 4K miles....and still loving the impact these units have had.
Having run 1200GS bikes for 8 years now, it has been interesting to see the impact running the AF units have had elsewhere. When I put the units on I took the opportunity to polish my standard headers back to new (bluing and all other imperfections polished out).
4K miles later I have a slight straw colour on the top part of the headers but other than that no other discolouration at all. Also, I am using allot less oil...granted this may be a factor of more miles but oil use had been pretty consistent up until then. I would need a top up every 1k miles.....not touched it since fitting the AF units.
I can only put this down to a cooler running engine....could the effects really be that dramatic.....it seems so.
You actually can measure the results on the road. The method is to take a GS-911, put it into data collection mode take several in-road acceleration samples, and average the results. The chart below is an example of that on a modified bike, compared to a stock dyno run done by a reputable shop. It isn't a perfect comparison, but the improvement in the 2000-3000 rpm range is what many riders report.
Further, it is well known among pilots of piston engine aircraft, which have a control that directly alters AFR, that engines get smoother as you shift them toward Best Power and they run roughly as you lean the mixture toward Best Economy.
If you leave the O2 sensors connected, chip remapping cannot alter AFR in those areas where Closed Loop fueling is active. Further, if a chip remapper does change fueling in the closed loop area, long term trims get out of whack in those areas not supported by Closed Loop. Not saying it can't be done to effect in the Open Loop areas (wide throttle angles) but it's tricky on a bike with O2 sensors.
The second chart below shows an R1200 before and after acceleration done on a dyno using gs-911 data collection.