Taking tranny and motor out. I need help and suggestions.

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Well due to time limits ect I won't be able to have my Commando on the road this summer. The riding season here on the prairies in Canada comes to an end at the end of October so by the time I got my electrical sorted, my wheels arriving and my forks on, it would be the end of August.

I've decided to do a total teardown now instead of fall like I planned. I simply wanted to get on my bike and have at least 2 months riding in but the agony spent doing that is not worth it so I'm just doing a tear down now instead to get it over with.

1. How do I get my transmission out and off the bike? I want to send it off for a rebuild and need to get it out. The bike is half apart as it is so it's easier just to finish that then put it back together just to take it apart again in 2 months.

Will the swingarm and engine cradle have to come out with the tranny or can the tranny come out with the cradle still on the frame? (rear wheel is off anyway right now)

-I assume a total pull apart of the primary assemblies (inner and out).
-I will need a clutch compressor and a gear puller. (I've never taken a clutch apart before.)
-Do I need Whitworth for this? if so, sockets or wrenches or both? (I don't own Whitowrh yet. Yeah, I know.....)

I'm new to this so I'm really jumping in with both feet and I always seem to like doing things the really hard way.

Thanks to any who offer assistance.
 

L.A.B.

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Re: Taking tranny and motor out. I need help and suggestions

Coco said:
Will the swingarm and engine cradle have to come out with the tranny or can the tranny come out with the cradle still on the frame? (rear wheel is off anyway right now)

No, but you will need to remove the three rear engine to cradle mounting bolts so that the cradle can be moved away far enough from the engine to allow the gearbox to be turned anti-clockwise (after removing the gearbox mounting bolts) far enough to remove it through the R/ H side hole in the cradle.

The motorcycle needs to be supported by the lower frame rails and the centre stand has to be removed, and the primary drive will have to be removed.

I don't think you will come across many (if any?) fasteners needing Whitworth tools in order to remove the gearbox?

Before you start doing all this I really do suggest that you get hold of a copy of the 850 MkIII factory manual (or Clymer manual -or both) if you do not have either one already? The Haynes manual doesn't really give much information on the 850 Mk III model which differs in many ways to the earlier models.
 
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Re: Taking tranny and motor out. I need help and suggestions

L.A.B. said:
Coco said:
Will the swingarm and engine cradle have to come out with the tranny or can the tranny come out with the cradle still on the frame? (rear wheel is off anyway right now)

No, but you will need to remove the three rear engine to cradle mounting bolts so that the cradle can be moved away far enough from the engine to allow the gearbox to be turned anti-clockwise (after removing the gearbox mounting bolts) far enough to remove it through the R/ H side hole in the cradle.

The motorcycle needs to be supported by the lower frame rails and the centre stand has to be removed, and the primary drive will have to be removed.

I don't think you will come across many (if any?) fasteners needing Whitworth tools in order to remove the gearbox?

Before you start doing all this I really do suggest that you get hold of a copy of the 850 MkIII factory manual (or Clymer manual -or both) if you do not have either one already? The Haynes manual doesn't really give much information on the 850 Mk III model which differs in many ways to the earlier models.

Thanks for the tips LAB. I have the shop manual already but shop manuals are sometimes infamous for not giving the whole story. I figured it would be good to ask a few who have doen this as they might give me some insight I wouldn't find by just looking at my manual. I'll look for a Clymer manual.

I'm going to buy a bunch of Rubbermaid tubs so I can have everything well organized and labled in ziploc bags so when I attempt to put everything back together things should go ok.

I'm also taking a ton of digital photos of how everything thing is now so I can get a proper visual picture of exhaust mounting brackets, oil lines, electrical and cable routing positions upon reassembly.

I don't own any Whitworth tools yet but I won't be doing engine or tranny work myself. Just the teardown and reassembly and removal and reinstallation of motor/tranny.
 
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