FE/FC Menacing fuel filter

It's funny how something so small could cause so much heartache. I have already yanked one out of a MY14 KTM and I see no reason why they wouldn't be in the hew Huskys as well. Luckily on the 2013 and newer, there is a fuel filter in the tank after the fuel pump to protect the injector. I really see no reason to run one at all. It was a fuel filter in a similar location to this one which cost us our win at Glen Helen 24hr this year.

Ty and I are working on a permanent kit solution for this issue.

I thought the "white" filter was the fix. My '13 KTM almost stranded me in the desert because of the filter clogging (and I didn't know what was wrong-the bike was almost brand-new!). I put in then up-dated filter and haven't had any issues since (over a year now).

What KTM ended up doing is putting a large filter in after the electric pump in the gas tank. This catches all debris before it can go into the injector. Some pre'13 models had this filter and some did not. One of the best setups I have come across is from OHR here:
http://www.cafehusky.com/threads/2-new-fuel-filter-possibilities-for-08-10-efi-bikes.27847/



Ty and I are working on a new solution to make this smaller and stream lined, yet clean fuel for thousands of miles.

How about using pre filter socks:
http://www.qualitycycleparts.com/Profill_in_tank_fuel_pre_filters_starting_at_25_0_p/ultra-mk2.htm

Whats a suitable micron level for a filter?

Hi after lots of fueling problems with my berg 450 2010 I learned this much:
All filters are needed. The one in the tank is to protect the fuel pump there. For inline filter someplace, best seems to locate it after/downstream of the fuel line coupler. The can-am fuel filter for efi quads, same units on all their models, is easlily available and cheap.
I didn't think it was fun to check a filter and its connections inside a gas tank, but maybe it is the only place where there is space. Will it bounce around and loosen a clamp? If that happens it is not practical to fix on the trail. Didn't happen to me, but I don't miss the sleepless nights worrying about this.
You also need a fuel tank sock such as the splitstream. It certainly takes longer to fuel up.
Throw away or thoroughly clean your old gas tanks. Fuel cleanliness of a WHOLE new level is needed.
The small KTM filter element pictured is supposedly a disposable and cheap item with short service interval. Not sure if the 1st one had a too large micron weave and was later upgraded to a finer spec. The silly thing seems to be that KTM barely mentions this super critical item.
Many teams have had fuel issues with DNF's last couple of years. I bet fuel cleanliness an dirt in bottom of old gas cans is a common problem.
When was the last time you flushed your tank and gas can completely?
So silly that spec of dirt can leave you in the middle of nowhere, this is a dirty business after all.

Hi, Dunno about the micron size, but the issue sure is relevant.
I tried a Profill and it took too long to fill up. The splitstream or similar has signifficantly larger fabric area, increasing the filtering rate, which seems to always be slow, and this one I felt just took way too much time.

I guess the smaller the micron size the greater the filtration hence slower refill rate hence my question on micron size.

I don't know the psi of the std KTM or Husky EFI pumps but l would, as Radbuster pointed out, add a filter just or after the coupler that would be fine enough to trap dirt and debris without effecting the performance of the pump. Do the injectors themselves have a filter?

Compact size would obviously be of importance, maybe the drag specialties inline filter and filters would a goer? http://www.motorcycle-superstore.co...-filter?SiteID=SLI|Fuel Filter&WT.MC_ID=10010
My only concern is it's made out of glass.

45psi, no they do not. Be careful which filters you feed that much pressure to.

Thanks Tinken, 45psi seems to be standard with most efi dirt and road bikes. This subject was brought up in this post:
http://www.cafehusky.com/threads/2-new-fuel-filter-possibilities-for-08-10-efi-bikes.27847/

You could use the Holley 3.5' inline filter but they seem a bit $$ or the Peterson 700 series in line filter which a mate uses on his road racebike with no effect to fuel pressure...then again you racing dudes have unlimited budgets.....just limited to the actual funds of these budgets

We actually have tried several filters only to have the filters come apart, even the metal ones and clog the fuel injectors. We are still testing and will have one soon I hope.

That sucks Tinken... l guess your only route is using a proper road motorcycle filter like the mahne unit but their fat critters...then again it's better than my diesel filter

Good luck!!

Exactly what we came up with too. This is why we decided to manufacture our own fuel filter which will be compact, yet have filtering capacity to roughly 4000 miles of use. Fully rebuild-able too.

Is there any concern with all these filters inline that the pump will cavitate and die prematurely??

Not with our filter.

Holley filter is out, won't handle the ethanol in our fuels.
I have a new pump/filter setup coming for the 449 which can be adapted to the 250/310/450/510/630/650's. The filter system will be lifetime, no need to replace filters, and bullet proof like all our products.

I'm well aware of these fuel filter issues on the KTMs. I haven't read of any troubles on the Huskies. What did Husky do differently? Are there any weaknesses in the system on my 2014 310?