Author Topic: 1980 MC clutch  (Read 1377 times)

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Offline piney

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1980 MC clutch
« on: March 07, 2018, 04:52:00 PM »
Hi,
I have an 1980 MC440, been having countless problems with clutch slipping.
Doe,s anyone know whether mine should have 2 circlips or 1?
Ant help much appreciated!

Offline Noel

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Re: 1980 MC clutch
« Reply #1 on: March 07, 2018, 04:56:11 PM »

Offline piney

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Re: 1980 MC clutch
« Reply #2 on: March 08, 2018, 07:55:43 AM »
Thanks Noel !!!!!

Offline sleepy

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Re: 1980 MC clutch
« Reply #3 on: March 08, 2018, 10:29:38 AM »
The number of clips doesn't effect the clutch tension. The outer one takes all the load. Make sure you have the springs double stacked, that is 2 one way then 2 the other. Sometimes there is room for an extra spring  or an extra steel plate. Also check that the clutch cover isn't putting the cam to close to the clutch give no effective free play. With the cable of you should be able to move the arm quite freely until the free play takes up.

Offline Nebo

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Re: 1980 MC clutch
« Reply #4 on: March 08, 2018, 12:57:19 PM »
   
  Sleepy is correct.

  But also check for Warped Clutch  Plates.

  Especially the first outer and the last inner.

  DO NOT use Synthetic Oil in the Gear Box/Clutch. It will slip.

  Use a good 20/50 Mineral oil .

Offline piney

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Re: 1980 MC clutch
« Reply #5 on: March 08, 2018, 05:19:04 PM »
Thank,s guys,

iv'e only used oil as recommended by Les and have installed numerous clutch plates and springs.

No free play on the cam seems to be the issue.
 

Offline sleepy

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Re: 1980 MC clutch
« Reply #6 on: March 08, 2018, 09:52:12 PM »
Try a thicker gasket under the cover or 2 gaskets.

Offline Nebo

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Re: 1980 MC clutch
« Reply #7 on: March 09, 2018, 01:27:51 PM »
Is the Clutch cover Original or has it been replaced.?.

This is very important as around this time 79/80. Maico made many changes to the Gearbox and Clutch.

  Firstly the Clutch covers are Machined norrower 2/3mm than the early Magnums.
 
  The Kick shaft is different . Apart from many parts in the clutch.

   Have you a copy the Maico 79/80 Service Bulletens?.   This the only way to be sure .

   They are not in the Service or Owners Manual.



Offline piney

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Re: 1980 MC clutch
« Reply #8 on: March 09, 2018, 03:00:30 PM »
Cheers Nebo,

Not sure about original clutch cover.

The service bulletin I have is 250-400-450 Magnum.

Maybe that's where I'm going wrong ? 


Offline Nebo

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Re: 1980 MC clutch
« Reply #9 on: March 10, 2018, 11:13:49 AM »
   The changes to the clutch started March 79. 
   But no One Maico is built the same as the next.
   
   There are Mainy changes up to 1982.    Go to the Opperman Motors Maico Web site.

     You can Down load all the Service Bullitons free of charge.
      This has all the Changes and Part numbers . Plus Measurements and Photos.

Offline piney

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Re: 1980 MC clutch
« Reply #10 on: March 12, 2018, 11:19:26 AM »
Unreal Nebo,

Thank's !!!!!!!!!!!!!!!!!!!!

Offline Nebo

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Re: 1980 MC clutch
« Reply #11 on: June 16, 2018, 04:02:31 PM »
   HI Piney.  Did you fix your Clutch?.

Offline piney

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Re: 1980 MC clutch
« Reply #12 on: June 19, 2018, 04:55:38 PM »
Not yet been flat out with life,

Hope to have some time next week .