BMW K bikes (Bricks)


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1Back to top Go down   RT wont start Empty RT wont start Thu Mar 09, 2017 5:17 am

AL-58

AL-58
Life time member
Life time member
Ill be looking at this on this Saturday coming.

Just looking for any specifics I should check.

Its electrical, the battery is fully charged but there is nothing when I turn the key on.  Its not the ignition switch as there is no power at the ignition switch. All the fuses appear fine.

What is in the circuit that I should check?

Al


__________________________________________________
'08 F650GS (798cc)
'19 R1250RS

+ another boxer engined motorcycle and sidecar

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

RT wont start K-dogs10
    

2Back to top Go down   RT wont start Empty Re: RT wont start Thu Mar 09, 2017 5:40 am

Chocolate

Chocolate
Life time member
Life time member
Hey!

Make sure the Battery is realy good, if she shows 12-13 V it doesn't mean she is OK, a cell could still be dead!

The cigarette plug should have power measure that!

I would replace some fuses, could be bad and you don't see it, or measure the fuses with a multimeter.

Have you cleaned the earth contact at the gearbox?

Cheers


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

3Back to top Go down   RT wont start Empty Re: RT wont start Thu Mar 09, 2017 5:51 am

Holister

Holister
Life time member
Life time member
Power to the ignition switch comes directly from the battery B+. The power does not pass thru any fuse or relay BUT it does loop off the starter relay. Pull the relay out and you'd still have power to the ignition. I think there's a connector in there somewhere but I can't remember where. Could be corroded/disconnected??
What's telling you that you have no power at the ignition switch?


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 RT wont start Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

4Back to top Go down   RT wont start Empty Re: RT wont start Fri Mar 10, 2017 10:17 pm

AL-58

AL-58
Life time member
Life time member
Probably the 0.0V reading on the voltmeter measured at the back of the ignition switch when the battery reads 12.7V

Probably a pretty fair indicator.


__________________________________________________
'08 F650GS (798cc)
'19 R1250RS

+ another boxer engined motorcycle and sidecar

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

RT wont start K-dogs10
    

5Back to top Go down   RT wont start Empty Re: RT wont start Fri Mar 10, 2017 10:22 pm

AL-58

AL-58
Life time member
Life time member
Running again, it was simply the connector plugging the ignition switch to the loom.

I couldn't explore it during the week as I couldn't pull the tank back due to short fuel hoses.  The lower left fairing needed to be removed to sort the hoses, no time during the week.

Connector sorted, hoses replaced and finally changed the alternator for one that charges properly.

Al


__________________________________________________
'08 F650GS (798cc)
'19 R1250RS

+ another boxer engined motorcycle and sidecar

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

RT wont start K-dogs10
    

6Back to top Go down   RT wont start Empty Re: RT wont start Sat Mar 11, 2017 12:44 am

charlie99

charlie99
VIP
VIP
good find al

ill be investigating installing a relay to take the high load currents away from the ignition switch and cabling - connectors
no big change to the system but bypassing the now ageing ignition switch ?


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

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