BMW K bikes (Bricks)


You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   Starter clutch Empty Starter clutch Mon Mar 23, 2015 7:04 pm

Rockman

avatar
Life time member
Life time member
The starter clutch on my 84 RT isnt working, just spins and does nothing. I know the problem is that its gummed up with sludge, and I fixed the same problem on my 88 RT using Nulon engine flush. This doesnt seem to be working on the 84. I sort of think I need to give the clutch sprags a bit of a jolt to get them moving so that the engine flush can do its bit. I did think of taking the starter motor off and inseting a suitable sized drift into the hole and giving the clutch a sharp rap to get things moving, but before I do that I'm looking for alternatives. Tried rocking the bike back and forward, tried roll starting it, tried short bursts on the starter motor. Any suggestions?

    

2Back to top Go down   Starter clutch Empty Re: Starter clutch Mon Mar 23, 2015 11:44 pm

Rick G

Rick G
admin
admin
I would not be giving it a hit. To me it sounds as if you have the old type of 3 roller clutch not the later sprag type and it may well be just worn out which usually happened fairly quickly. Maybe get some carb and throttle body cleaner and squirt a heap in through the hole so as to get it on and over the clutch mechanism then a bit of rocking with the starter in, it may remove some of the build up.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

3Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 1:35 am

Rockman

avatar
Life time member
Life time member
G'day Rick. Yes its an 84 model so probably the older type. It was working ok up until a month ago when the brushes in the starter motor gave out. Replaced them and the motor now motors well, but I think sitting around hasn't done the clutch any favours. I wasnt actually going to HIT it, just some little taps to shake things around a bit. Smile

    

4Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 10:26 am

kioolt

kioolt
Silver member
Silver member
It's possible that when you rebuilt the starter motor you got the housing reversed.  That will cause the starter to run backwards and give you the same symptoms as a bad starter clutch.


__________________________________________________
2004 R1150RT 186,800 miles 
1991 K100LT 128,700 miles
1982 R100RT 106,900 miles
Total 422,400 BMW miles

AMA,BMWRA,BMWMOA


The cheapest thing on a BMW is the nut that connects the handlebars to the seat.
    

5Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 10:50 am

Rick G

Rick G
admin
admin
kioolt wrote:It's possible that when you rebuilt the starter motor you got the housing reversed.  That will cause the starter to run backwards and give you the same symptoms as a bad starter clutch.
Quite possible. Try turning the housing of the starter 180° in relation to the brush holder plate. Because the starter uses permanent magnets unlike most car starters, the magnetic field is reversed and the starter turns the opposite direction.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

6Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 11:01 am

92KK 84WW Olaf

avatar
Life time member
Life time member
Its easy to reverse it. Before you open it mark it with marker so you don't put it back the same way. After you reassemble it make a permanent pair of marks so you can align it next time. I found its a little more fiddly reassembling it when you are doing it to the correct way. Its goes real easy the wrong way.


__________________________________________________
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 48,061 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 miles

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

7Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 7:08 pm

Rockman

avatar
Life time member
Life time member
Aha - distinct possibility. I lost my mark when I dismantled it so its very likely that I've got it backwards. 50-50 chance. I'll pull it out on sunday and try it rotated 180.

    

8Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 7:26 pm

smithy

smithy
Life time member
Life time member
Rockman wrote:Aha - distinct possibility. I lost my mark when I dismantled it so its very likely that I've got it backwards. 50-50 chance. I'll pull it out on sunday and try it rotated 180.

No need to dismantle it Phil, just bench test and see the direction it's turning, if it turns clock wise you've got it wrong, it needs to turn anti-clockwise.


__________________________________________________
87 K100rs : Vin 9462 
86 K100rt : Vin 9901
Naked
98 K1100lt: Vin 8044
    

9Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 7:30 pm

Rickmeister

Rickmeister
Life time member
Life time member
Sorry, Smithy!...Is that looking from the front of the bike, towards the rear, or from the rear of the bike towards the front?


__________________________________________________
Assumption is the root of all stuff-ups!
    

10Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 7:43 pm

smithy

smithy
Life time member
Life time member
Rickmeister wrote:Sorry, Smithy!...Is that looking from the front of the bike, towards the rear, or from the rear of the bike towards the front?

From the rear towards the front


__________________________________________________
87 K100rs : Vin 9462 
86 K100rt : Vin 9901
Naked
98 K1100lt: Vin 8044
    

11Back to top Go down   Starter clutch Empty Re: Starter clutch Tue Mar 24, 2015 9:26 pm

Rockman

avatar
Life time member
Life time member
smithy wrote:
Rockman wrote:Aha - distinct possibility. I lost my mark when I dismantled it so its very likely that I've got it backwards. 50-50 chance. I'll pull it out on sunday and try it rotated 180.

No need to dismantle it Phil, just bench test and see the direction it's turning, if it turns clock wise you've got it wrong, it needs to turn anti-clockwise.
 Good idea, although I'd almost bet my left one that its the problem.

    

12Back to top Go down   Starter clutch Empty Re: Starter clutch Wed Mar 25, 2015 3:50 am

92KK 84WW Olaf

avatar
Life time member
Life time member
Because its just been out nothing will be seized up. You will probably do it in the time it takes to cook breakfast....

When I took mine out I did find a hard to see set of alignment marks on it, two notches about 1/8 inch apart and a matching pair on the end plate. But I had already seen the warnings about polarity so made my own marks. Even a marker will do if you do it before you open it....until you decide to clean it all up before you reassemble and find the marker is now gone.


__________________________________________________
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 48,061 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 miles

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

13Back to top Go down   Starter clutch Empty Re: Starter clutch Wed Mar 25, 2015 6:54 pm

Rockman

avatar
Life time member
Life time member
92KK 84WW Olaf wrote:Because its just been out nothing will be seized up. You will probably do it in the time it takes to cook breakfast....

When I took mine out I did find a hard to see set of alignment marks on it, two notches about 1/8 inch apart and a matching pair on the end plate. But I had already seen the warnings about polarity so made my own marks. Even a marker will do if you do it before you open it....until you decide to clean it all up before you reassemble and find the marker is now gone.
That is sort of what happened. I put a small scratch mark across both halves when I took it apart. Then I decided to clean up the housing with a wire brush. Scratch mark is gone. I could see one side of the two alignment marks you mentioned, but not the other. Anyway, easily fixed.

    

14Back to top Go down   Starter clutch Empty Re: Starter clutch Sun Mar 29, 2015 6:18 pm

Rockman

avatar
Life time member
Life time member
Fixed Very Happy . Not only did I have it misalighned, but the centre magnet section was upside down. probably why I couldnt find my mark.

    

15Back to top Go down   Starter clutch Empty Re: Starter clutch Sun Mar 29, 2015 6:53 pm

kioolt

kioolt
Silver member
Silver member
I don't believe that upside side down would not make any difference but front end to back end reversed will change the polarity of the magnets and reverse the motor.  I'm glad I was able to help.


__________________________________________________
2004 R1150RT 186,800 miles 
1991 K100LT 128,700 miles
1982 R100RT 106,900 miles
Total 422,400 BMW miles

AMA,BMWRA,BMWMOA


The cheapest thing on a BMW is the nut that connects the handlebars to the seat.
    

Sponsored content


    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum