Boxerworks.com

Bike is a 1988 R100RT monoshock with a leaky outer rear drive seal that I'd like to replace.

Unlike the twin shock models, the four nuts that connect the drive to the swingarm are the twelve-point style, not a hex nut. The tool kit has the correct size wrench, but it doesn't fit over the nut because the nut is too close to the drive shaft housing. Anyone know of a special tool for this task? Thanks!

I think you may be looking for a "torque wrench adapter for driveshaft bolts."

This is the one that Northwoods Airheads offer. I have one. It is a very handy little tool:



Details from them here:

http://www.northwoodsairheads.com/Tools.html

driggs wrote: Anyone know of a special tool for this task? Thanks!

Grind down the diameter (a little) of a 13mm(size?) 12pt ring spanner (wrench).

AFAIK they've always been 12-point heads...they are on my /7. Never heard that the took kit wrench wouldn't fit it.

Kurt in S.A.

The 12mm 12-point Heyco box-end spanner in the OEM toolkit should fit.
Mine did, no grinding.
Driveshaft bolts (at the transmission) are 10mm 12-point. I tried the Northwoods tool for that, but it deformed installing the second bolt (at proper torque). I now have the Snap-On version.

Here's a pic of my leaking rear outer seal....pic was taken with the drive still on the bike so you can see the oil path leaking down the cover. Can I replace this seal by just prying it out and drifting the new one in or do I have to take the cover off? Any advice is helpful...thanks!
[img]http://i1255.photobucket.com/album ... .jpg[/img]

driggs wrote:Here's a pic of my leaking rear outer seal....pic was taken with the drive still on the bike so you can see the oil path leaking down the cover. Can I replace this seal by just prying it out and drifting the new one in or do I have to take the cover off? Any advice is helpful...thanks!
[img]http://i1255.photobucket.com/album ... .jpg[/img]

Sorry - don't know as my cover was off.
If you do remove the cover there are 2 threaded (5mm?) holes at 180 degrees apart. One is seen in your picture at about 9 o'clock.
Screwing bolts in pushes the cover out. There is a gasket underneath.

Sorry - don't know as my cover was off.
If you do remove the cover there are 2 threaded (5mm?) holes at 180 degrees apart. One is seen in your picture at about 9 o'clock.
Screwing bolts in pushes the cover out. There is a gasket underneath.[/quote]

Right...I've made a mess with the paper gasket on older rear drives, it tends to stick and needs to be scraped off. I'd like to avoid that if possible. It looks like the seal can be replaced the same way you would a rear main seal, just pry it out and install the new....

As far as the 12 point nuts on the drive housing go, an ordinary bi hex 3/8 socket will fit. A long extension, or better an extension with a wobble end, will give clearance for a ratchet wrench to fit.

Rob

As far as the 12 point nuts on the drive housing go, an ordinary bi hex 3/8 socket will fit. A long extension, or better an extension with a wobble end, will give clearance for a ratchet wrench to fit.

Rob