swing arm removal 850mk2a

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snibor

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Jun 1, 2007
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Hi all been a long time since i was here last but got some great input into my fork and porous head issues ....

now i have a sloppy swing arm ... the workshop manual is not very explicit on how to do this job ... from a quick look it would seem i have to take the primary out to get to the drive side bush ???

any pointers would be greatfully received ....

steve
 
Normally, the pivot spindle is extracted from the right-hand side using a bolt, and you should then be able to remove the swinging arm, as the bushes are inside the arm and not held in the cradle?
However, if is actually the pivot spindle that is loose in the cradle then you may have a problem?
 
And don't forget to remove the spindle retaining bolt first!
 
Mk2a swing arm

Hi LAB ... looks like a few of us frequent both triples and Comando forums :)

so what hold the spindle nut on the drive side then ?? is it a nut that is held in place so the spindle can be removed from the timing side ?

I need to get a parts manual ... the workshop manual i have sucks ...

steve
 
I think some late IIAs *could* have had the MkIII double cotter arrangement instead of the bolt (somebody correct me if I'm wrong)? So just check exactly what you have retaining the spindle?
 
Mk2a swing arm

LAB ... you need to be tolorent with me on Commando stuff .... I know my way round all the triples but on the Commando it's all a new venture :) .... just to get the head off I had to re-tool my workshop ... who the hell designed those carb mounts ?? I assume that one needs three hands to get it back on and hold onto the push rods at the same time :)

steve
 
Stuff some strips of cloth into the holes in the head after you drop in the pushrods, invert and place over the barrels, lower carefully, then pull out the strips of cloth. Align pushrods by peering through the inspection cap openings.
 
Re: Mk2a swing arm

snibor said:
LAB ... you need to be tolorent with me on Commando stuff .... I know my way round all the triples but on the Commando it's all a new venture
Click to expand...

OK, OK, Steve, as it will be exactly a year tomorrow since your first post regarding your "new acquisition", I'd have thought even you would have at least got yourself a parts book by now? :wink:
 
Mk2a swing arm

LAB ... yes that is true ... and i should have a parts book .... the commando has been at the back of the garage doing not a lot for the past 9 months or so but just finished all my & other peoples stuff so decided to get stuck in again and sort the porous head ... and other stuff like the seing arm (just one T150 motor to finish a rebuild and the commando will have my full attention ) ...

as i mentioned before this is the first commando i have had and i like it ... just such a different beast to the triples and easier to ride with all the torque ... and will be better once i stop nearly throwing my self over the bars thinking i am cogging up a gear :(

steve
 
Steve,

Your MkIIA swinging arm pivot may also have the 'welch' end plugs rather than the long retaining screw and end caps?
 
grandpaul said:
Stuff some strips of cloth into the holes in the head after you drop in the pushrods, invert and place over the barrels, lower carefully, then pull out the strips of cloth. Align pushrods by peering through the inspection cap openings.
Click to expand...

thanks Paul ... that is very helpfull .... I was thinking of growing another 3 or 4 fingers for the job :)

steve
 
Just make sure you use cloth, not heavy duty paper towels that can tear off bits as they are pulled out.

Also, make sure the strips of cloth are not shedding threads.
 
I wrapped a rubber band around each set of rods and pulled it up to the intake stud to keep it tight. worked like a charm and they didn't fall out so i could maneuver the head back on. just snipped em when the head was back down.

also what inspection caps are you talking about grandpaul??
 
The valve adjustment inspection caps. Just shine a flashlight in there and fiddle the pushrods in place with a thin screwdriver or other such instrument.
 
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