Jota rearsets back brake linkage is fouling swinging arm.

J

jdugen

Junior member
Location
Manchester UK
(Must be one of the longest titles?)
Anyway.  Trying to get to the bottom of my high(er) speed wander.  Perfect up to 90, weaves set in above.  New front tyre fitted, back looks to be fine (but am beginning to suspect it).  Stripped out the swinger to take a good look at bearings etc, and noticed the paint worn through to bare metal around the inner linkage of the back brake.
With the coil return spring fitted, the lever part that goes through the frame juts into the swingarm space.  Spring removed and the lever pushed much further into the frame giving good clearance. 
At the moment I have made up an alternative coil spring attached to the linkage on the footrest side that works and looks neat enough.  Anyone else come across this 'little foible' or do I just shrug and get on with my life?
 
yes, had the same very recently, cross shaft fits in fine if pressed through but install the spring and it moves back and fouls the swingarm
I cut 1/2 a coil wind off and then heated the spring up in the right spot and bent the coil back to make a new end, this allowed the cross piece to seat fully home and clear the swingarm
well, sort of clears the swingarm, still fouls but only just
to me the new spring supplied was t0o thick, as in too many coils when compared to a standard spring

HTH


 
Lever it into position (screwdriver, piece of wood, whatever) so it is as far away from the swing arm as possible.
Then fit the linkage to the splined shaft and tighten the lock bolt.
Just trying to fit the linkage by hand allows the shaft to slide back under pressure from the coil spring, making it rub on the swing arm.

 
Can help.
I use the washer type used on the gear shaft.
Not really required if you use my method above.
Some lateral play in the notch on the brake shaft allowing the through bolt a few mm either way.
Just enough to clear the swingarm.
It really is a crappy design though.
 
Yeah. Looks like a cobbled together afterthought. I reckon the rear disk brake was a retrograde step at the time, considering how well the drum worked. It could have been OK if they'd put a bit more thought into it. Can you get the thing out without removing the swingarm? (I don't have one - mine's a right foot brake).

It actually works marginally better with the brake on the right.
 
Try removing the shocks and pushing the swingarm up as high as it will go.
I put them in before fitting the swing arm so not sure if they are removeable with it in.
 
The inner rearset plate and the linkage can be removed with the swinger in situ, but a PITA to refit the linkage to the lever ::)
 
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