Big Gun TFI Power Box

Big Gun TFI Power Box
Big Gun TFI Power Box

$242.99 - $269.99
10% Off - Save up to $30.00

Select your bike to see if this fuel control unit fits
Description See Also: 2 Reviews 6 Questions Fitment
Item #GUN000S

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2 Reviews
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All Reviews
BenDover Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Love it.

I have this and a Dr. D exhaust on my 14 Honda 250 and I love. So much more top end.

kfx450r
hudson, ny
Amazing

what a differance in power i have a exaust and a intake and this product made the final touch if ur looking for power i totaly recomed this product..

6 Questions
Answered:   6
Not Yet:   0
Honda
Location: Hadley
Q: How many settings does it have?
Over 5 months ago
MotoSportExpert
MotoSport Staff Expert
Over 5 months ago
A: The POWERBOX has six (6) programmable features (modes) available. Each mode has multiple settings. Instructions can be downloaded from the Big Gun website here:

http://www.biggunexhaust.com/index.php?route=product/category&path=821_822
JIMMY634
Location: Massachusetts, USA
Q: WHATS A GOOD SLIP ON PIPE TO GO WITH IT?
1 year 3 months ago
I HAVE A 2014 RANCHER 420 4X4. WHATS A GOOD SLIP ON PIPE TO GO WITH THIS AND WHAT ABOUT MY O2 SENSOR IN THE MUFFLER DOES THAT TAKES ITS PLACE?
MotoSportExpert
Expert MotoSport Staff
1 year 3 months ago
A: I would recommend one of the Big Gun systems depending on what you are looking for. Please contact one of our sales professionals to inquire about special orders and availability.
Dirt Bike / ATV: 1-888-676-8853
Tyler9512
Q: Does this product work on ATVs with a carburetor?
1 year 9 months ago
MotoSportExpert
Expert MotoSport Staff
1 year 8 months ago
A: No the Big Gun TFI Power Box is for EFI models.
CHICKEN
Location: New Jersey, USA
Q: More power?
2 years ago
i have 2014 rmz 250, big mouth intake, Yoshi full exhaust. bike has little to no top end. I kill off the bottom but lose it in straight aways. I seem to have enough power running 14/49 gearing and just looking to add a little more at the top. the area we ride is very flat with little to no real jumps. lot of whoops and long straights. will this product help. even just a little would be good, but a lot would be better.
MotoSportExpert
Top 1 Contributor
2 years ago
A: The Big Gun TFI Power Box is designed to optimize the fuel/air ratio of your machine. Depending on the stock machine, it may or may not benefit you with a completely stock motor, airbox and exhaust. Many times with the EFI systems used on the motorcycles and ATVs found today, when adding an exhaust, engine and/or airbox modifications, you will have to retune the stock EFI system to make sure you have the optimum air/fuel ratio. The tuner will not make any PEAK HP gains to your machine, but if your air/fuel ratio is not correct, you can see gains to the power curve of the machine by retuning the EFI correctly to optimize the modifications. Again, the EFI tuners do NOT produce more HP, they allow you to tune your machine to the correct Air/Fuel ratio.
matt
Q: Will this box increase my stock brute force 750 and if so by how much?
Over 3 years ago
MotoSportExpert
Top 1 Contributor
2 years 4 months ago
A: The Big Gun TFI Power Box is designed to optimize the fuel/air ratio of your machine. Depending on the stock machine, it may or may not benefit you with a completely stock motor, airbox and exhaust. Many times with the EFI systems used on the motorcycles and ATVs found today, when adding an exhaust, engine and/or airbox modifications, you will have to retune the stock EFI system to make sure you have the optimum air/fuel ratio. The tuner will not make any PEAK HP gains to your machine, but if your air/fuel ratio is not correct, you can see gains to the power curve of the machine by retuning the EFI correctly to optimize the modifications. Again, the EFI tuners do NOT produce more HP, they allow you to tune your machine to the correct Air/Fuel ratio.
Luke
Q: How do know what to set it on?
Over 3 years ago
MotoSportExpert
MotoSport Staff
Over 3 years ago Location: Portland, OR, USA
A: When this unit is plugged in it will still retain the stock EFI map. It is a piggyback unit that will allow you to add or remove fuel in the low, mid or high RPM range to compensate for additional flow characteristics when adding aftermarket intake and exhaust systems. You can select which RPM range you need to modify and then select how much fuel you would like to add or remove. You must have a general idea of tuning in order to set the amounts to the correct value for proper operation of your engine. Typically when adding an exhaust system, bikes will run lean so more than likely you will be using this to increase the fuel output of the injector to correct the lean condition.
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