www.boxertrix.com

Can anybody shed any light on this item on ebay?
http://www.ebay.co.uk/itm/350768475825? ... 26_rdc%3D1

I'm guessing that weighs a lot more than the std item, is there anything to be gained from shortening the wheelbase for road only use?

Steve

I have a GS arm on mine it does sharpen up the stearing [a bit] also lifts the bike about an inch, for mine and the way i ride it was a good mod but may not suit everyone, i'm not sure if i would bother fitting an adjustable one it seems most people fit them for bling appeal and for no other reason[hard hat on]
Also as i have said before with anything you can adjust there is a big margin for getting it wrong
Hope this helps Dai

Boxered wrote:I'm guessing that weighs a lot more than the std item, is there anything to be gained from shortening the wheelbase for road only use?

The OE bent tin arm is quite heavy! It is not difficult to make an aluminium torque arm that is lighter than OE, although that one does seem to be a bit bulky at the rear.

As far as I can see, it is not very adjustable. The main effect of changing the length is to raise or lower the rear end.

The main issue for me would be that it has a rose joint at the front. Whilst it looks really cool, they wear like there is no tomorrow. On some race cars they are changing rose joints every race. By using the rose joint there is no rubber bush at that end. BMW have always used a rubber bush at both ends of the torque arms - there must be a reason!

sandbar

Sorry just noticed it's for a 1200
But as sandbar pointed out no rubber bush could cause problems and the rose joint isn't a good idea

Buy it!
Those are good ones........I think they were made by Evoluzione..........I have one on my 12S.
It is adjustable at the Heim end.....I call it a Heim....Sandbar is calling it a rose........and it is adjustable at the rear end by placing shims between the rod and the yoke.

As for wear.............I have not had any problems.......maybe because it really does not move very much.


Boxered.........on a 12S, you want to lengthen the arm for quicker steering.....and it will raise the height of the bike.

If you shorten the arm, that will have the opposite effect.

Cheers

You'd think the seller would at least - list the dimension (centre-centre) of the two extreme positions?

Al

Droptarotter wrote:.....I call it a Heim....Sandbar is calling it a rose........

There is an interesting reason why the name is different.

Here is a quote from Wikipedia:

The spherical rod end bearing was developed by the Germans in World War II. When one of the first German planes to be shot down by the British in early 1940 was examined, they found this joint in use in the aircraft's control systems. The H.G. Heim Company was given an exclusive patent to manufacture these joints in North America, while in the UK the patent passed to Rose Bearings Ltd. The ubiquity of these manufacturers in their respective markets led to the terms heim joint and rose joint becoming synonymous with their product. After the patents ran out, the common names stuck although "rose joint" remains a registered trademark of Rose Bearings Ltd. Originally used in aircraft, the rod end bearing may be found in cars, trucks, race cars, motorcycles, lawn tractors, boats, industrial machines, go-karts, radio-control helicopters, and many more applications.

What ever happened to 'Evoluzione'. They produced some good stuff!

sandbar

I think they gave up on BM's and just concentrate on Ducatis

and Heim Gericke started making clothing

sandbar wrote:

Droptarotter wrote:.....I call it a Heim....Sandbar is calling it a rose........

There is an interesting reason why the name is different.

Here is a quote from Wikipedia:

The spherical rod end bearing was developed by the Germans in World War II. When one of the first German planes to be shot down by the British in early 1940 was examined, they found this joint in use in the aircraft's control systems. The H.G. Heim Company was given an exclusive patent to manufacture these joints in North America, while in the UK the patent passed to Rose Bearings Ltd. The ubiquity of these manufacturers in their respective markets led to the terms heim joint and rose joint becoming synonymous with their product. After the patents ran out, the common names stuck although "rose joint" remains a registered trademark of Rose Bearings Ltd. Originally used in aircraft, the rod end bearing may be found in cars, trucks, race cars, motorcycles, lawn tractors, boats, industrial machines, go-karts, radio-control helicopters, and many more applications.

What ever happened to 'Evoluzione'. They produced some good stuff!

sandbar

Thanks for posting this Sandbar......it's nice to start off my day by learning something new!

Cheers

I might just pop in a cheeky bid for it, you never know
shame its not black

Thanks for all of your thoughts

Steve

sandbar wrote: What ever happened to 'Evoluzione'. They produced some good stuff!

I should have done my research before I asked the question. They closed down in November 2011. The mans name was Ken Zeller! He did do some Ducati business, but his speciality was always BMWs.

I understand too much time and money spent on 'Customer Service' and new product development, only to have his best ideas ripped off by swivel-eyed low lifes! And he did have some great ideas.

sandbar

Interesting Wikipedia info.

I've always heard people refer to them as rose bearings, but never knew why.

Regarding the adjustable "torque" arm length, will this affect the squat/rise characteristics of the rear suspension/shaft drive interaction? Surely it must do to some degree?