BMW K bikes (Bricks)

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1Back to top Go down   Turnover issue Empty Turnover issue on Tue Mar 26, 2013 6:11 am

BooG

BooG
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When cranking the engine to start, the starter turns the engine for what seems like 1 or 2 revolutions, then seems to stick for a second, then cranks again and the K75 starts. This is not a case of the bike not starting, but I am wondering if I need to deal with the symptom before a failure of some sort? I have read that cleaning up the starter motor is a good idea. Any other pointers? Battery is a good, and well charged, Oddessy PC680.
Thanks.

    

2Back to top Go down   Turnover issue Empty Re: Turnover issue on Tue Mar 26, 2013 6:21 am

blaKey

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I'd probably get the battery tested under load to see how much "oomph" it has.

When was the last time that the starter motor cleaned/brushes checked?


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Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

3Back to top Go down   Turnover issue Empty Re: Turnover issue on Tue Mar 26, 2013 6:53 am

BooG

BooG
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To be honest...never whilst I've owned her!!

    

4Back to top Go down   Turnover issue Empty Re: Turnover issue on Tue Mar 26, 2013 7:26 am

blaKey

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In my opinion...check battery as described above and clean the starter as a minimum.

Do that and see how you go.

Questions? Ask!


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Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

5Back to top Go down   Turnover issue Empty Re: Turnover issue on Tue Mar 26, 2013 2:04 pm

92KK 84WW Olaf

92KK 84WW Olaf
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Starter is quite easy to do, just two allen screws and a [10mm?] nut for the wire. Its easy enough to take apart, two long screws, just put some marks on the casing ends before you take it apart to help align them after.

You will be taking the battery out of the way anyway so it is worth checking it out.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska 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 103,800 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell Now 36,188  miles
    

6Back to top Go down   Turnover issue Empty Re: Turnover issue on Tue Mar 26, 2013 4:47 pm

Avenger GT

Avenger GT
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Check the gearbox end of the negative lead, might be corroded.

    

7Back to top Go down   Turnover issue Empty Re: Turnover issue on Tue Mar 26, 2013 6:45 pm

charlie99

charlie99
VIP
VIP
whilst you have the starter out, file off the mounting points to renew the contact to earth-engine (as it draws lots of amps ) that junction can corrode up

you might have to do both the area around the bolt heads and the contact area to the engine proper or as suggested in some tech updates run another earth cable to one of the mounting bolts (thick stuff)

but from the sound of it ..you may have to relinish the armature comutator, you may have a couple of segments in the comutator that are a little corroded ?

as avenger suggested clean the earth mounting point as well

measure the brush lengths ...see if they moove freely etc inspect the brush earth mounting plate for signs of corrosion around the mounting locations (where it clamps up to the starter) . the brush kit is not expensive (plate and brushes)...and if i was pulling it down i would replace them in any case .


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OTurnover issue Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

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