KTM "teeny-tiny" In-line fuel filter and the Golan FI fuel filter
I decided to go ahead and install the Golan FI fuel filter while the gas tank was off."WHAT ...???? You're going to install *another* fuel filter ....??!!!"
Yup. And here's why, Bunky.
== If you're a technical woods rider ... walking 10 miles out of the woods over some gnarly/technical trail ... without your bike .... sucks.
== If you're a trackie .... having the engine cut out as you're doing a big triple .... sucks *BIG* time.
Not to mention incredibly dangerous.
Replacing the small, stock, KTM in-line fuel filter is a necessity due to it's incredibly small size and tendency to plug or swell and cut off your fuel.
Installing a Golan or Can-Am FI fuel filter before the injector helps ensure that *virtually no* dirt/dust/smooge is reaching your fuel injector.
And installing it between the quick-disconnect and the injector helps catch any dust/dirt picked up when the fuel connector is apart.
(Remember to use your wash cap covers, boys and girls!)
The 2012 KTM four-strokes (4T) come with a very, very tiny, black, cone-shaped fuel filter ... that is located *INSIDE* of the fuel rail that connects to the fuel injector body.
The fuel line then actually slips *over* the end of this filter .... as it slides onto the barb fitting of the fuel rail.
This tiny filter is the final dirt barrier between the quick-disconnect coupler and the fuel injector.
The fuel filter that came with the "early run" 2012 models is black-colored and can filter down to 10 microns.
But due to it's very small size -- it plugs way too easy.
It is also *rumored* to swell from engine heat (?) and close off the fuel flow. But that hasn't actually been proven.
Either way - it is problematic and affects/shuts off the fuel flow.
Which leads to hard starting, sputtering, bogging, poor performance, and a potentially damaging lean condition.
To address this issue, KTM has issued Tech Service Bulletin (TSB) 1202.
The TSB kits contain a screw-type FI clamp for the fuel line and a light-grey-colored fuel filter to replace the black one in the fuel line.
The grey-colored filter has a larger mesh that can filter down to 20 microns.
Which means that it will be less prone to plugging ... but that it will also not supply as much protection as the black, 10 micron filter.
This is why some peeps are completely removing the final, cone-shaped filter (regardless if it is the black, 10 micron
or grey, 20 micron model) and replacing it with another external FI fuel filter.
One of the current "replacement" filters of choice is the Golan "Super Mini" fuel filter.
It is stainless-steel, rated at 10 microns filter capability, can flow 6 gpm (that's a big point, BTW),
and you can clean or replace the filter element.
It is also small enough to fit in between the quick-disconnect coupler and the fuel rail on the throttle body.Golan "Super Mini" FI fuel filter:
Length: 0.675" long, not include Barbed Ends
Diameter: Super Mini: 1.375"
Weight: 1 Ounce
Barb size: 0.312 (5/16")
P/N: 70-312G (5/16" Barbed Fittings)
Here's a pic of the Golan Super Mini filter:
So that's the rationale on the "why" I'm installing the external FI fuel filter .... here's the "how" to do it.