When I first purchased my 16 Fatboy, I ordered a heavy breather and V&H big radius 2 into 2 pipes.

I had the FP3 tune done, but I find that when riding at under, say, under 20/30 kmph or 2000 rpms (roughly) the bike is quite snatchy when holding the throttle steady. To describe it better, when I am travelling in slow moving traffic and holding the bike at a steady slow speed, it is not smooth but rather jerks forwards (quite mildly, but noticeable) every second or two. It is more of an irritant than a serious problem as often I am on the freeway rather than in town, but it is annoying. I get very little deceleration popping and the bike performs very well at speed.

My questions are these: 

1. I have raised it with the dealer, who says it is a tuning issue and can be fixed. He has asked me to bring in my tuner. I don't know what that means, firstly, and secondly I don't have it. I assume it is some sort of bluetooth module or other plug in box or device. I have the original pipes and other bits but no tuner. As I understand it, the FP3 once installed is unique to the bike. Does that mean that if I can't find the tuner (and I genuinely believe that I never received it - every other part which was taken off, such as lights, heel shifter, pipes, seats, brackets I have got and found but nothing to do with the FP3) then nothing can be done, or...?

2. Irrespective of the above, is my overall problem something which is "normal"? In other words, will the bike always be somewhat snatchy at low speed with the FP3 and my set up? The reason I ask this is because as I say, I am happy with the performance at normal (say 40kmph+) speed. If there not going to be much change, then I would probably leave it as is, especially if it is going to cost me more money to get a new tuner or whatever it is that I will need to do. If I regularly rode in peak hour traffic, it would be a real issue but I don't. I also think that it seems worse in hot weather, but that might just be because I am hot and angry already in standstill traffic on 35 degree days and so I notice it more.

Your thoughts and answers on this are greatly appreciated.

Thanks in advance.

The FP3 has an auto-tune feature which may resolve the low speed issue you're having, but of course you need the module to be able to use it.

Is it possible that the dealer left the module plugged in? Where would I check?

I am all but certain that I did not receive it separately. 

And yep, I did pay for it at the time and supposedly had the tune done at the pre-delivery stage.

If the module cannot be found, does that mean getting a whole new FP3, assuming the dealer doesn't find the box containing the module out the back somewhere? And if I am going down that path, is there something similar but which might be better? I don't want to turn this thread into a discussion about the pros and cons of the various tuner options, but if there is an obvious answer I would be grateful to hear your thoughts.

I know for a fact that everything that went on my bike is on there and everything that came off is kept in one spot in my shed. 

I have never seen a box that mentions the tuner nor do I have any paperwork for it (except a receipt showing I’ve paid for it). 

Call me paranoid and suspicious, but is perhaps one reason the bike is running as I’ve described because it was never tuned at all? 

You need to follow through with what you paid for. Am looking all things I paid for and let ride. 

Yeah, was take for a ride many times..

Is there a way to see whether the bike has ever been tuned? I’m guessing not. 

After this, I’ll leave it alone - thank you for all of your help so far. 

Looks like I’m a bit rooted either way, then. 

Anyway, cheers all for your advice. 

If I end up having to buy a new tuner for what is essentially a stage 1, will it matter whether I get another FP3 or is the Screaming Eagle Prosupertuner just as good? I think it’s a bit cheaper.

Thanks again.

I do appreciate your advice though.

Reason I asked is that I assume that the dealer will either want to sell me another FP3 or more likely, the Screaming Eagle Prosupertuner. 

If they do, I’d just like to know which to choose if the price is sort of similar. That said, I’m still praying that they find mine in a box out the back.

I can’t really do much (as far as I can tell) as against the dealer. 

If the dealer is dishonest they will simply say I’ve lost the tuner and from what I understand from previous responses, there is no way I can disprove that, other than maybe to say that the bike shouldn’t be running rough at low RPM if the tune had been done - and even that I’m not clear on. 

Basically, as I see it, I’m reliant on the dealer either being honest or at least offering some sort of discount on the replacement. I’m not saying it’s my fault, but I should have checked for the tuner, or at least the tuner box, in the bundle of take off parts when I collected the bike. I assumed it would be in there and at the time I was more interested in riding than checking the box of bits that I didn’t want or were wrappers! My mistake. 

Learning about the various tuners has been an unexpected bonus thanks to all who have taken the time to reply - fantastic stuff. 

I would have thought that if you hand over upwards of $1500 for all that stuff, the minimum you could expect is a bike that rides reasonably well. 

I might add that mine doesn’t crackle and pop at slow speed; it’s just jerky. It does pop at high RPM deceleration or downshifting but I can live with that as a granted (although it probably shouldn’t be). After all, I didn’t get the pipes to be quiet. It’s really just the slow speed jerkiness that I hate. It makes for pretty unpleasant city riding. 

I’ll let you know how I go.