Question about 1984 BMW K 100 RT

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Universal fuel pump versus genuine fuel pump for BMW K100RT

I have a BMW K100RT and it had been sitting in my garage for 6 years with 1/2 a tank of fuel. I found that the petrol had gone stale, it has crystallised in the tank. I have cleaned the tank right out, but I’m troubled about the fuel pump. The bike had done160,000k’s and maybe I should buy a new fuel pump, but the cost for an original bosch fuel pump is around $500AU, there is a Bosch part # 0986580013 universal fuel pump that I may use instead of original and the cost of it is only $86au
the ad for the Bosch # 0986580013 fuel pump reads as follows
BRAND NEW high performance Bosch 51mm INTANK fuel pump.
This is an universal fuel pump - suits any INTANK application.
Genuine Bosch. Made in Czech Republic. In original Bosch packaging and documentation.
*** Sorry we don't have any performance data on this fuel pump, other than the fact that this is a 51mm INTANK fuel pump. Perhaps do a bit of homework yourself to decide if this pump is the right choice for your vehicle. ***
I’m having a problem finding any specifications on the abovementioned fuel pump. Can anyone help me to know whether this pump would be okay to use on my BMW K100 bike. The original BMW K100 specifies the fuel pump pressure 2.5 bar and output 45 litres per hour, is it possible to go higher in pressure and flow?

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  • SAPWanderer Apr 25, 2010

    Hi GVMG,

    Did the cheaper fuel pump work okay? I have a K100RT and the fuel pump has failed so l need to replace my pump. I am curious if the alternative pump worked and where you purchased it from

    Thanks

    Philip

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Without changing out your fuelline I would not reccomend to go for a higher pressure and flow.
About the fuelpump....sometimes going for the cheap option is in the longrun more expensive.

Posted on Mar 02, 2009

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1. If your battery was 3 years or older when you last had the bike running you should replace it.
2. If you believe your battery might still be serviceable remove it from the bike and put it on a 1 or 2 amp trickle charger for 24 hours. If it is the old lead acid type with visible cells and acid levels fill each cell to the top line with distilled water and replace the caps, run the vent tube into a plastic or styrofoam cup, any cells that are cloudy/milky replace the battery.
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4. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
5. Remove your air cleaner and clean and re-oil per Mfg. specifications.
6. Remove the carburetor, disassemble and decontaminate with a carb dip or if you have EFI remove injectors and clean with carb spray and compressed air
7. Remove fuel valve and filter disassemble and clean as necessary, remove fuel lines and replace with new ones.
8. Replace spark plug with a new one and check for spark.
For more information about your issue please visit the websites below. Good luck and have a nice day.
http://xlforum.net/vbportal/forums/archive/index.php/t-39135.html What to do When Your Motorcycle Won Start
http://www.carlsalter.com/download.asp?p=298
BMW Motorcycle Parts Fiche OEM BMW Motorcycle Parts online 1970 present BMW
Bmw k100rt owners manual

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