adjustabl;e rear torque arm.

neil mcintosh · Apr 3, 2003

i,ve noticed you can buy an adjustable torque arm allowing you to shoprten it and thus raise rear of bike for more ground clearance. anyone used one or have onefor sale. have found raer shock to be most comfortable when at 50% setting but clearance too low for fun. any experiences re above. (like to keep a smooth ride for the dog)

Howard Millichap · Apr 4, 2003

IMHO this could seriously affect the life of your drive shaft. You'll be making the U/J bearing bend through bigger angles.

Den · Apr 4, 2003

No you woudnt, the drive train would be straighter with a shorter arm. apparently, the arm from an 1100s fits and is shorter.

(RIP) Boxertools · Apr 4, 2003

Most 's' owners want to go the other way, & buy GS arms to raise the height of their bike for more ground clearance.
Or some buy custom made arms that are adjustable.

Mike h

mikyh · Apr 5, 2003

No, you're wrong

dennis thomson said:
No you woudnt, the drive train would be straighter with a shorter arm. apparently, the arm from an 1100s fits and is shorter.

Universal joints dont transfer movement evenly, but in double peaks and lows per round.
If a system consists of two joints that together keep the original axis direction, the two joints cancell each other's inconsistencies, and thus keep them from over stressing.
Changing the original close to paralelogram setting will reduce the joints life.
To summerize, as much as I know oilhead driveshafts are far stronger and better designed than older airhead Paralevers so there's not a lot to wory about anyway. (when one changes the torque arm in airhead Paralevers - then you get a busted driveshaft real quick).
Miky

roger monks · Apr 5, 2003

have adjustable arm from Motorworks fitted to my 1100GS and when rear ride hieght increased I find it turns (steers) faster, especialy noticeable at lower speeds although it may feel a bit unnerving to some as it drops into turns quite a bit faster.
I must point out that the instructions that came with arm state that ON NO ACCOUNT must the arm be adjusted so that it is greater in length than the original arm i.e. you cannot lower the rear ride hieght to obtain a lower seat hieght!
also found that high speed stability on fast curves has improved and the front feels more planted with more feedback due to increased wieght over front end, which is the main reason I fitted one after being advised by well known suspension specialist that increasing rear ride hieght would improve high speed stability.
Also if you fit a Ohlins rear shock you will find it is longer than std shock again ancreasing ride hieght (also bloody good)

neil mcintosh · Apr 5, 2003

How much did you shorten torque arm by? I much prefer handling with rear shock wound up but comfort position is about half way which has significant difference on ride hieght. 15stone plus dog minimum load. ideal would be same hieght/clearance and comfort level of half way adjusted rear shock. Are they expensive?.I am also 6.2" tall so hieght is not a problem. any opinions /exp welcome.

roger monks · Apr 5, 2003

Ihave adjusted torque arm so that in combination with Ohlins when bike on centre stand both front and rear wheels are just in contact with the ground on level surface, could increase more if required but then obvious problem with stand/s, could always lean against a wall (ha,ha)
Ohlins comes with optimum set up instructions for average rider,alter to compensate for rider wieght and bike load.

Muddy · Apr 11, 2003

Suspension strut

I've just removed the original item and fitted a fixed (20mm shorter) strut. The drive train is now straighter and has raised the very rear of the bike, measured at the luggage rack, by a full 30mm. Looks much better. Not been out yet but I'm confident the handling will have improved.

A friend has taken the original arm to fit to his R1150R. The 1150R arm is longer than the GS's.

By the way, £132 from Boxer Design.

jenks · Apr 11, 2003

Muddy,

Please let us know what it's like once you have ridden it

Andrew

Muddy · Apr 11, 2003

Well, it felt like someone had jacked the rear end up so no surprise there. But for the first few miles it felt odd, twitchy odd even. I got off after 10 miles and watched my friend put my original strut on his 1150R. We then went out and started giving it some which is when I concluded that it was so much better turning in to corners; just more 'flickable' I guess.

That's about it. I only did it for the looks and so that I had a better steering angle two up. Oh, it didn't feel twitchy after I got on the second time.

Keith.

adjustabl;e rear torque arm.

neil mcintosh

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