hi all
is anyone had Stock Zfroce with Free flow exhaust only?
is it improve the performance?
how much in % its add to the motor?
do you need to change the sensors if you change the exhaust?
any recommend one?
Thx

[2015 Z Force 800 53/Trail EPS]

If you look in the How Tos at my exhaust mod, it made it pretty much free flowing but it was more then the EFI system could compensate for so it leaned out too far. When I added back in the spark arrester it was able to work within it's range again..just barely.. and the plugs are burning...well on the lean side of normal. It did help the power enough to be noticed. Any less restriction and it will need a programmer.

I am running a 2 Bros. exhaust. I've not checked my plugs, but it doesn't hesitate or show any other signs of being lean. The power difference is noticeable, but not a big difference. I just got my EJK today. I can't wait to see what it does.

what is EJK?

http://www.dobeckperformance.com/dobeck-EJK-controller.asp

The ECUs on these units run on a tight closed loop ship. Any changes done to these motors need to be closely watched. If you are running a 2 brothers with a freer flowing exhaust and not running an EJK or DynoJet expect issues sooner rather than later. These machines already run super lean as it is. Adding a free flowing exhaust plus air filter just makes it worse.

EJK stands for electronic jet kit. It's the fuel controller from Dobeck Performance. I haven't put mine on yet and I don't have any experience with fuel controllers, but the EJK is supposed to be the best.

how many HP the EJK add?
will it improve the performance even without changing the exhaust?