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Author Topic: KTM 690 purging fuel out long rang tanks  (Read 556 times)

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Offline MikeB

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  • Bike: KTM 990 Adventure
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KTM 690 purging fuel out long rang tanks
« on: January 14, 2014, 06:04:31 pm »

Can anybody help me. I have bought 2 KTM 690 endures and fitted them with rally kits and long range tanks.

When we are riding and just before the seat tank is empty fuel is "pushed" out the breather pipes of the long range tanks.

Does anyone know why this would occur?



Offline sigmund freud

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    Location: Europe
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Re: KTM 690 purging fuel out long rang tanks
« Reply #1 on: February 01, 2014, 12:19:18 am »
Close your long tank and ride first seat tank half empty(120 km ride) and open than the fuel lines of your longrange tank!

Offline 777

Re: KTM 690 purging fuel out long rang tanks
« Reply #2 on: February 01, 2014, 08:27:11 am »
I have the Safari front tank , I ride until the petrol light comes on for seat tyank then open front tank , no issues
TS 50- Gave away
RM 125- Not sure where it is.
IT 200- Sold.
XT 550- Sold.
CR 250-Sold. RMX 250-Sold WR 250-Sold. CFR 450x-Sold. CRF 250x-Sold. XT 660R- Sold KTM 690 Enduro- Alfie Cox Special Edition .Honda XR 650L., WR450, Current bikes, KTM 500 Six Days and BMW 800GS

Offline Rascal

Re: KTM 690 purging fuel out long rang tanks
« Reply #3 on: February 18, 2014, 01:27:45 pm »
I had the same problem recently in the karoo (45 C), had to ride without the front tanks(taps closed). Im wonder if a one way valve on the main line to the rear tank will stop the fuel pushing back to the front tanks?

Offline DjfLoYd

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« Reply #4 on: February 18, 2014, 04:46:30 pm »
I have the same issue with my Safari long range tank but only when I ran both tanks empty and tried to fill the safari tank only.
Fuel came out the safari tank over flow pipe. Opening the rear seat tank I could hear a whooshing sound. For some reason pressure or a vacuum is
created. Closing the front supply, filling the rear and running it for a 100Km the problem does not manifest. I think it has something to do
with the location of the fuel pump for one. My mate has the Omega kit on his 690 and they moved the fuel pump to the front tank and he has no such problems.

I've emailed Safari to see if they can shed some light on it. Will let ya know if I hear anything. Might help you.