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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Charles on April 29, 2015, 03:48:35 AM

Title: K75S aftermarket fuel pump
Post by: Charles on April 29, 2015, 03:48:35 AM
Good morning gentlemen.
I am looking to replace my fuel pump on my K75S 1990 model. It is running but the fuel seems to be going straight out the relief valve at the bottom of the pump. Can the relief valve be blocked up? or do I need to look at something else?
What after market pump needs to be fitted?
Thanks
Charlie
Title: Re: K75S aftermarket fuel pump
Post by: Motorhobo on April 29, 2015, 06:37:01 AM
I've been running a fuel pump for a Ford Escort since 2008 no problems. Here is info from the Lieberry...

http://www.motobrick.com/index.php/topic,5019.0.html

Title: Re: K75S aftermarket fuel pump
Post by: Charles on April 29, 2015, 08:14:28 AM
Thanks Motohobo.
 :2thumbup:
Title: Re: K75S aftermarket fuel pump
Post by: kris on April 29, 2015, 08:17:41 AM
Charles, I'm in Canada and sourced one of these pumps out of the US for about $30US. I was able to repair my OEM pump so I've just kept the new one as a spare. It will require some jigging to fit it into the in-tank holder but I'm not about to pay $300 + for a fuel pump on a bike I paid $1400 for, especially since people have had good luck with much cheaper alternatives.
Title: Re: K75S aftermarket fuel pump
Post by: koapono on April 29, 2015, 08:24:39 AM
this pump available for 16 dollars.........I purchased one just to carry around!

http://www.amazon.com/dp/B000C1KJJE/ref=pe_385040_128020140_TE_3p_dp_1
Title: Re: K75S aftermarket fuel pump
Post by: Charles on April 29, 2015, 08:26:13 AM
So does the SKU: HFP-439B also work on the K75S?
C
Title: Re: K75S aftermarket fuel pump
Post by: WayneDW on April 29, 2015, 09:15:58 PM
There are a number of ebay sellers who are selling new fuel pump kits that they have put together for the K bikes.
Title: Re: K75S aftermarket fuel pump
Post by: Charles on May 01, 2015, 02:44:15 AM
Thanks Koapona
I tried to order the $ 16 one buy they don't ship to South Africa.
I will search for another one.
Charlie
Title: Re: K75S aftermarket fuel pump
Post by: koapono on May 01, 2015, 09:41:21 AM
charles, et all, it's an electric fuel pump, hence: e, fp, hp prefix. the 2042 search will bring up airtex, carquest, purolator and many others. believe pump is primarily for ford application: escort, taurus and others. a google search of 2042 fuel pump will yield a ton of hits and many choices. there may be issues with diameter of pump versus diameter of mounting bracket/ring but some creative foam and zip-tie applications will overcome those issues, be sure components used will withstand constant submersion in gasoline.
g'luck
Title: Re: K75S aftermarket fuel pump
Post by: Charles on May 02, 2015, 02:26:02 AM
Thank you gentlemen.pump is ordered.
It is far too long since I rode my brick. looking forward to it  :bmwsmile
Title: Re: K75S aftermarket fuel pump
Post by: jenkinskg on May 02, 2015, 02:06:06 PM
I changed mine, crank no start?
I have spark, see fuel on plugs and it spins fast

Need to check fuel pressure and compression next

I bought the carter pump shown in this link

http://www.partsgeek.com/catalog/1991/jeep/wrangler/fuel_delivery/fuel_pump.html

Any ideas , cannot find pressure spec
Title: Re: K75S aftermarket fuel pump
Post by: koapono on May 02, 2015, 02:44:03 PM
did it start/run before you changed the fuel pump?
if yes, do you have new pump wired correctly, wrong polarity will make pump spin in reverse rotation.
just a thought.
g'luck
Title: Re: K75S aftermarket fuel pump
Post by: jenkinskg on May 02, 2015, 11:23:09 PM
Bought bike with Previous owners issues

Dont even know whole story how it stopped.

I got it all going seemed to have ground issues and also found starter Relay with lose conenctions and just to make sure made ground wire between tank and battery.

Ran great after I got all that sorted, ran until warm, drained old oil, went for a buzz for 12 miles to a friends house
Was so good at 80, had to be careful.

I sold my last k75 more than a year ago, forgot how good they felt, this motor seems stronger than my 92 k75s
This one is an 86 , it has 2 18 inch wheels  80's and feel very diff than the old 92, I also put 80 series on it.
Make them so much more solid on turns, now I need right side switches to get it 100%