850 commando rear wheel drive

Hi
Trying to fit rear brake drum and locating pins into the rear wheel with new cushion drive buffers
Can't seem to get all three to line up, have taken the rear hub off and wheels supported off the ground
There must be a trick to this, I presume the buffers are positioned in the rear wheel in the same configuration as per the manual
Any special clues.
Thanks Martin.

There are a few discussions on this, and the varying qualities of cush rubbers these days.
I found it would only work if the rubbers were all pointing up slightly, meeting the vanes as it were.
When you push the drum/paddles down into the hub, the rubbers pushed down into their positions.
This can take a bit of muscle....

If it doesn't go fully home, things are not right, need to try it again.

There is supposed to be a thin and a thick cushion on each side of paddle for drive or brake loads so if both thick it will fight you to insert. Also check the paddles as famous for twisting in seat and needing tacked or pegged back aligned and stable. As you have cushions on hand just slim down half of them to put on brake side with a dab of glue-goop, insert over night to set up and fly with the wind till chewing up to dust again and again. Tire side wall is my only cushion materials after giving up on Norton quality 15 yr ago. The glue helps pads stay put when using the fast mount rear wheel on side of road or shop comfort.

Many thanks guys, tried a few combinations I'm sure they were once rubber and not a new plastic type of buffer, bit of lanolin spray and some grunt and they eventually went in after standing on the brake drum hub

Cheers

Yup, that's the baby.

Is it just me or does the fact you have to take the brake drum assembly off to force it into the crush (ha ha) drive make the hole idea of the two piece axal quick release rear wheel redundant. The idea is the wheel fits on when the drum is in the swinging arm.

As they are cheap i filed (yes filed they are rock hard) the thicker ones a little till i could just force the wheel in without the the falling over. I just check the for free play now an then but all is well so far.

The news ones i bought as i believed the old originals had gone hard over time do feel about the same hardness (just digging your finger nail in nothing more scientific than that). If I'd have known i wouldn't have got new one's an i only fitted them as I'd bought them now so might as well.

The first time I took my 69 bikes rear wheel off(3 studs) it took about quarter an hour with a four pound mash hammer and wooden wedges, it's been ok since. I am shortly going to fit new Cush rubbers to the 72bat bike after reading this my concerns have been vindicated as I would like my rear wheel removal not to involve heavy lumps of metal and half a Brazilian rain Forrest not to mention a gallon of sweat!

J

auldblue said:

The first time I took my 69 bikes rear wheel off(3 studs) it took about quarter an hour with a four pound mash hammer and wooden wedges, it's been ok since. I am shortly going to fit new Cush rubbers to the 72bat bike after reading this my concerns have been vindicated as I would like my rear wheel removal not to involve heavy lumps of metal and half a Brazilian rain Forrest not to mention a gallon of sweat!

J

Click to expand...

I replaced the cush rubbers on a MKII rider this fall with all relevant parts in the frame. Lubed the paddles and the rubbers with teflon powder and I too had to resort to a pair of single-sided hardwood wedges (the pair used together apply parallel force between the right swing arm member and wheel) to force the wheel onto the paddles. Although it was easy and straight forward to do, there was no way in hell the wheel would ever allow insertion of the paddles without applying mechanical advantage via the wedges. And as noted by others above, the new rubbers were surprisingly hard.

Hard cushions don't cushion much and soft ones don't last much so remind ya to think of hobot DIY mc tire side wall pads next time ya notice the wheel crush drive hammer grinder slackness. I had to fix rear flats in cold rain on side of hwy with steaming wife waiting on me so did find the guick change set up to ease the process with glued in tire side walls that didn't fight my cold-pain sensitivtized hands. I do have to stand on wheel in drum to get em set the 1st going around. We need a section for Norton worshiping rituals like the center stand timing dance and ape men pounding on stuff or jumping up/dn screaming holey words in devotion.

I had that trouble so I ground off the pair of ridges behind each pad. The wheel goies on easily now. Putting slippery stuff on them is no the answer in my book, as can be learned from some above.
Dereck