I am running slip ons now and the HD shop says if I go to a full system the only thing I will need is a dyno to tune it, but supposedly can't run a PCV without voiding warranty.

My local ind shop says you can't dyno a bike without a tuner because they can't tap into the ECM without doing damage and really jacking your warranty. Which makes sense, but why would the HD dude tell me to dyno without a tuner which would void the warranty, but the local shop says pretty much the opposite.

Basically my question is, has anyone had a dyno without having a tuner?

 

I had the dealer do pipes and air cleaner on my fatbob when I picked it up and they just did the dyno and remapped the ecu so to answer your ? yes

 

What?
Firstly, why are you looking to dyno your bike? By doing so, you'll just get hp and torque figures. Secondly, WTF is this shop saying you can't dyno a bike without 'tapping into the ECM and doing damage"? If you want to know hp at specific rpms, you simply clamp on a lead to one of your spark plug leads, and bingo boffo... If he's referring to 'tuning' your ECU, he's not correct about that either. HD sells either a tune-able ECU, or sells the software to tune your own.
You can also buy one of the myriad of 'tuners' sold for HD's. A Power Commander is one of them. If a PC5 is available for your bike, then you can also buy the optional 'Auto-Tune" which plugs into the PC, as well as your o2 sensors, and maps the bike while you ride, eliminating the need for 'dyno tuning'. There are other tuners sold that also have the same capability. The downside to these are while the do map your bike, they don't get it perfect, so you're gonna leave a little power and efficiency on the table. For a street bike however, they're perfectly fine.

 

The bike runs great, no complaints at all. Not looking for power numbers, I couldn't care less about that right now. Just want to get the air/fuel mixture right and make sure it is running as cool as possible.

 

IF you are going to Dyno, you might as well change the air filter and add an EFI tuning module too. Just my opinion.

 

I've had 3 baseline dyno readouts done to my bike. Stock, with Rush slip-ons and with KW slip-ons.

My main purpose was to verify the air fuel ratio, which should be included with each dyno run. I wanted to be sure that the a/f ratio didn't change after installing the slip-ons.

I have no other mods. Just slip-ons.

 

I have Stage 1, but I think I am going to go with the PCV.

 

The indy is correct. No option to tune the stock ecm without additional software or a piggyback device. The ecm has some ability to adjust to small changes with pipes and some breathers as long as it's within the range of the narrow band sensors, but it will end up pretty much like a stock factory tune at best. Dealers cannot deviate from the epa tune legally, so all the dyno will do is show you what you have now, and you won't like it.
Ron

 

the Indy CAN dyno your bike, he just can't change/tune your bike without a piggy back tuner.
the dealer can change your ECM programing (they have to keep it with in EPA Specs)

A dynamometer or "dyno" for short, is a device for measuring force or power. For example, the power produced by an engine, motor or other rotating prime mover can be calculated by simultaneously measuring torque and rotational speed (rpm).

 

man your dealer is giving you some BS. better get advice in the forum or from an indi

to answer the question "has anyone had a dyno without having a tuner?"
yes my sportster was carb and i had a few dyno runs done to check the afr but no dyno tunes.