Author Topic: Where to get a Tank Sender - UK? My K75 Broke down on me  (Read 492 times)

Offline bluebossa

  • ^ Proficient Motobricker
  • Posts: 164
  • K75 and R65 Owner
Where to get a Tank Sender - UK? My K75 Broke down on me
« on: May 10, 2026, 05:15:56 AM »
Well, my new to me K75C, recommissioned and stood for 16 years packed in and broke down on me this week!
I set off and the Red light wouldn't go out... then it died - and I had to push it 1 mile back home.

Fuel Pump died... 10amp fuse blew when I checked, but replacing it and still nothing so I stripped the tank to find the following - though it initially looked pretty good inside...
I could see lots of rubber and black bits... yuk.

All Rubber disintegrating - pipes corroded, the pump holder vibration rubber - dead, all sitting in the bottom of the Tank.

It was just all too much for the Bosch fuel Pump/Filter combo, the Pump gauze was also knackered so it was sucking everything up
Though I may have accelerated things as I added a set of Fuel system cleaner from Wynns to go through the EFI and degunk it... I think this hastened its end... any thoughts on that one?...

I had done 300 miles on it, but now its awaiting all internal parts.. full tank strip/clean and rebuild with new Pump, Filter, internal Piping and sender Gasket...
However finding a replacement Tank sender is proving a challenge.

That's all OK - though I had to walk it back to my house - it died within 2 minutes of leaving home - so I was lucky I wasn't on a big trip.

Anyhow - trying to find a replacement Fuel Sender - is like finding the proverbial Rocking Horse SH1T.

Why are they so expensive second hand $250 - £200 - E200 for a Second hand unit on EBay, with nothing available new?
Witness - https://www.ebay.co.uk/itm/365440946110?_skw=BMW+K100+Tank+Sender&itmmeta=01KR8JQWC6HZVQYNWCQJ2HEJTF&hash=item5515fa4fbe:g:aVYAAOSwH8pnyD9p&itmprp=enc%3AAQALAAAA0GfYFPkwiKCW4ZNSs2u11xBVaOnSW4k7Nt%2FbGx0585n13htWlVxGVyMjHZyoygkjc35K%2FqX0PPKE%2FXeuXOu9qXeHuSuLsAQodilaGVdmBqXbS%2F2tqFGSsRIMUYIexemocFEC9fD2cTCDyvfu4Ro3T9%2FMD8Adp%2FyRzsnOtab2kMs2wDuAd30cBQvHlCgxRxvyMoyzNF5%2BydHd0oypeXBmWeLkkoOE7oGF%2B6IV%2FeEgtHON9MMlF3kG40Nl%2BxgcdDw%2BFUSCrQl6%2FqpBt6wwO30hvaQ%3D%7Ctkp%3ABk9SR7DG35LCZw

Motoworks have no S/H units in stock - though I am going to ring them on Monday - any ideas?

PLEA - Anyone in the UK have one for sale - I will post a Wanted Ad... meanwhile pictures of the mess I found inside attached...
I'm booked on a Charity Bike ride next Sunday for Mens Health in the UK and wanted to use this Bike, rather than my R45 Boxer - which is a little underpowered 2 up.

The K75C is of course 40 years old, so doing this is a must anyway to give it the next decade of running... so I'm replacing everything...
As you can see it's a wonder it did 300 miles for me...


  • UK
  • K75C
Current Bikes: K75 (C) in the UK (1986), R45 (1981)
Former Bikes:  K75RT, K75S, R850R, K1100RS, Dnepr MT10-36, R1200GS, K100, R100T, R100RT.
BMW R45 and K75 Blog

Offline Laitch

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Re: Where to get a Tank Sender - UK? My K75 Broke down on me
« Reply #1 on: May 10, 2026, 11:04:11 AM »
New fuel level senders are the same price in the States as in the UK and Europe. Used ones are a gamble and uncommon as well. Get a new one like this one from Kparts Holland. Soak the tank in white vinegar a couple of days, clean it with a plastic brush or nylon scrubbing pad then rinse it out.
Be certain you replace hoses inside the tank with SAE J30 R10 or NBR/NBR submersible fuel injection hoses and fasten them with screw or pinch clamps made for fuel injection hoses. Don't use that hose for outside hoses. Those would be SAE J30 R9 or equivalent fuel injection hoses.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline bluebossa

  • ^ Proficient Motobricker
  • Posts: 164
  • K75 and R65 Owner
Re: Where to get a Tank Sender - UK? My K75 Broke down on me
« Reply #2 on: May 10, 2026, 11:45:14 AM »
Thanks Laitch... Yep resigned to buying new now, no point in gambling on a second one from 1994 at the same price!
 so thanks for the link... Will source a fuel gauge when it's done too as believe they fit straight on, bizarre they didn't fit from Factory...

Correct hose on its way, expensive but yep submersible... Plus EFI clamps, check..
Thanks for the link...
  • UK
  • K75C
Current Bikes: K75 (C) in the UK (1986), R45 (1981)
Former Bikes:  K75RT, K75S, R850R, K1100RS, Dnepr MT10-36, R1200GS, K100, R100T, R100RT.
BMW R45 and K75 Blog

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