Adjustable dog-bone?

[more_fasterer]

I want to find someone who would be able to make up an adjustable dog-bone for my NC30, similar to the FJ12 one in the pic.

Has anyone made one of these or seen one in action? Any pointers in the right direction would be greatly appreciated.

[Cajun]

any metal work place i guess would be able to make some up, what are you hopping to lower lower/raise?

[more_fasterer]

I want to raise it up, with the standard late-model shock at this stage. I'm hoping that the reduction of the dog-bone's length will also change the linkage ratio, making the suspension action firmer at the wheel.

[Brian d marge]

invest 25 euros in tony foales soft ware , before you spend money on making them ..it does awhole heap other other stuff to , which may be of use

Stephen

[Robert Taylor]

I want to raise it up, with the standard late-model shock at this stage. I'm hoping that the reduction of the dog-bone's length will also change the linkage ratio, making the suspension action firmer at the wheel.

It wont actually change the linkage ratio much , but it will affect the start rate and you could just as easily end up with a ''dead'' area of movement. But advice to buy the Tony Foale software is sound, provided you are prepared to do the work in pre-measuring things up. All linkages are different so a generalisation cannot be made for all. Having said that alternative dogbones tend to very often be a band-aid rather than a technically correct cure.

But I also suspect you might be trying to compensate for deficiencies in the rear shock relevant to your application and personal stats? Is the motor developing more torque making it squat more readily when accelerated briskly in especially the lower gears, etc etc? You might more correctly achieve the result required by installation of a firmer spring ( dependent on your personal stats ) or more low speed hydraulic control i.e smaller main shaft low speed bypass jet and a slightly higher opening pressure on the main compression stack. But not always possible to change bypass jets on oem shocks such as this.

[Sanx]

I'm really beginning to resent this Robert Taylor bloke. Every time he posts something, I realise how close to bugger all I actually know.

Keep it coming, Robert!

[more_fasterer]

Thanks for your input Stephen & Robert.

I'm well aware of the standard shock's limitations as the spring rate IS too soft (not from power, but more from my weight) and the damping's going to be correspondingly not enough for me either. Add to this the F3-spec forks and there is a tendency for the bike to wallow & squat at the rear.

At this point I am solely after greater ride-height from the dog-bone, if I can get a slightly stiffer feel from the change in ratio, great. If I get a "dead" area of movement, bugger.

Next step for the bike is a rebuilt or new rear shock. No doubt who I'll be calling first about that!

[Brian d marge]

been said many times before ... step 1 spring , step 2 fiddle.

get the basics right first , then you can make a more informed decision later and springs aret that much coin

Stephen

[Robert Taylor]

Actually ( as previously stated ) the dogbones wont change the ratio much, if at all. The real effect is they will raise the ride height and change the swingarm angle to give it more inherent anti squat i.e its more extreme angle will resist chain pull torque a little better. It will help but not as much as I suspect you need. Try to resist going too far, as you can with some linkages get a ''swingback effect'', not to mention more chance of tucking the front.