BMW K bikes (Bricks)

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1Back to top Go down   K75 Starting/running issue Empty K75 Starting/running issue Wed Aug 20, 2014 10:48 am

92KK 84WW Olaf

Life time member
Life time member
I called round to my friend yesterday and he had a K75RT to match my K100RT in his workshop. It had just been bought and had a few issues for him to sort out. Someone has decided to resurrect a 1994 K75RT with low miles. 

He doesn't really get enthusiastic about working on K bikes because of electrical issues and explained that it starts and runs but then after a few minutes cuts out when opening the throttle and will not rev over 5000rpm. Sounded like a fuel issue. Anyway had a look in petrol tank and it was returning petrol fine and guessed that because it was starting ok that there wasn't an issue with the fuel pump. Filter was just brand new. Bike sounded very sweet too. So much so I can see my next K being a K75!!

I remembered posts here about there being a signal from two sources and rather cheekily fired it up but held the starter button down for a moment. It revved fine so its getting fuel on start up.....I thought this was a case of a connection being an issue. So my friend pulled out the under seat tray and the computer........let the computer hang over the frame without disconnecting it, the bike ran fine and revved freely so the short term diagnosis was that there is a bad connection on one of the pins. Opened up the connection and cleaned them over and refitted it. He then organised a test ride and it seemed to run fine.

So my friends question was what two pins [if I am even right] are the relevant ones. His reason is that he wanted to clean up the pins but wants to be covered in case its not the pins but a broken wire in the loom. Owner doesn't want to spend an arm and leg on it and I am hoping we might rope him into the Eccentrics.

I cant find the thread about this but if someone knows where it is........

1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 45,920 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 miles

1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500

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