BMW K bikes (Bricks)

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1Back to top Go down   Is this normal? Empty Is this normal? Fri May 01, 2015 4:23 pm

ddunks

ddunks
active member
active member
Right guys should be a quick one. 1985 ish bike stutters when accelerating rapidly, i assume it's fuel relegate but unsure if it's normal. It only happen when only have say 4 litres or less left in the tank, I lived with it for years since I just fill up again but never asked the question. Is this normal? Could there be water in the tank or do I need to reroute hoses etc. I replaced the fuel filter some years ago but it didn't make a difference.

    

2Back to top Go down   Is this normal? Empty Re: Is this normal? Fri May 01, 2015 4:33 pm

Avenger GT

Avenger GT
Life time member
Life time member
It's normal. The fuel pump is near the front of the tank, and the fuel surges to the back of the tank under hard acceleration. When the fuel level is low the pump picks up air, causing the bike to stall.

    

3Back to top Go down   Is this normal? Empty Re: Is this normal? Fri May 01, 2015 5:55 pm

Born Again Eccentric

Born Again Eccentric
Life time member
Life time member
Just like Avenger says. 

Need to be a little cautious when low on gas and accelerating hard, particularly if going uphill - it's caught me out a few times and that sudden loss of power is not what you want as you are in the middle of trying to overtake slower moving traffic!


__________________________________________________
Is this normal? Uk-log10 Is this normal? Sco-lo15
                              Paul  Is this normal? 905546712

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donor" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

4Back to top Go down   Is this normal? Empty Re: Is this normal? Fri May 01, 2015 6:26 pm

ddunks

ddunks
active member
active member
Great thanks for your time replying., I suspected as much but it's good to know for sure, I always thought I might investigate one day so it's saved me some needless tinkering.. Cheers.

    

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