Waiting is hard to do.

[John Dorlon]

Tuloose, Read this

When I got my Vendetta, the Scissor clamp acted the way you describe...I couldn't get it to "spread". Then I took it apart and turned one of the pieces around the other way, put it back together and it started working that way.

 

[Tuloose]

Still trying

Thanks Jermy & John.
I just tried turning the clamp upside down and it still doesn't work.
I realize that the scissors clamp does not spread wide enough to force the head rest tubes against the seat tube.
I can insert the clamp and pull it up & down and it doesn't tighten against the head rest tube at all.
I am beginning to think the rubber tubing that was on the head rest when it was shipped must be in place for the clamp to work?
I spoke to Jim Parker last night about the rubber tubing but he thought it was just protection for shipping and was not needed for the clamp to work.
I'll go dig the rubber tubing out of the garbage, take the seat off one more time and try again.

 

[Jeremy S]

For what it's worth, my

For what it's worth, my rubber tubing is still on there (small bands around the tubes, plus a larger band around the clamp area, with a slit for tightening the bolt). I thought it was to provide additional friction and/or prevent metal from grinding on metal. But, I guess it will also make the fit tighter which might help you.

 

[John Tolhurst]

scissor jack for headrest

Some comments on the scissor jack. This applies to V2.0 that have already been shipped. The manual current shows the scissor jack installed through a hole on the HF tube. That is for the next production, done to try to make this less confusing.

Here is a picture of Vendetta, Silvio is the same, showing how the scissor jack fits:

Each wing is a U section, and with the open end facing up.

I had them put into a rubber sleeve to keep the unit together. Its possible some were shipped with the bolt entering the wrong side.

The screw pushes against the floor of the tube.

The barrel nut is a close fit. A smaller diameter barrel nut would mean the wings won't push out far enough.

I went with the scissor jack rather than internal clamps. Clamps are easier to understand perhaps, but not as neat. I want the headrest to project smoothly out of the frame. Hard to make the headrest legs any closer together.

 

[Tuloose]

Upside down

Thanks for that photo John.
Mine was one of the batch that had the clamp shipped upside down (with the open side on the bottom).
It looks like the rubber tubing must be left on to tighten things up enough for the clamp to work.
I took the tubing off because it interfered with inserting the head rest tubes into the frame with the clamp in place.
I haven't had much luck trying to get the clamp into position once the head rest in inserted into the frame.
This has been very tricky for me and so far unsuccessful .
Right now my head rest just rattles around inside the frame whenever I lift my head off the rest.

 

[Eric Winn]

On my Vendetta, I left the

On my Vendetta, I left the rubber tubing around the clamp and headrest tubes to hold it in place as I slid the whole shebang into my desired location. The rubber tubing also helps the clamping to be a bit tighter and it definitely makes it more grippy so the headrest assembly resists moving in and out of the frame tube.

What I do is make sure the V shape of the clamp matches the V shape of the frame tube as John's picture above shows. BUT, I also have the bolt threaded almost all the way out - little to no thread showing at the tip of the V (the very bottom in the photo above).

This makes the tip of the V for the clamp (the hinge part) just about dragging on the bottom of the frame tube. It would all just fall down and slide into the bottom arc of the frame tube like this but for the rubber sleeve holding it in place.

I have the clamp positioned pretty far down toward the free ends of the tubes. I also insert the headrest assembly just about as far in as it will go as I'm short. Even set loose, with where I have the clamp positioned the frame tube narrows and ends up pinching the free ends of the headrest tubes together just a little and it starts snugging up the clamp assembly a bit even BEFORE I start turning the tension bolt.

As I turn the bolt in so the tip presses down on the inside of the frame tube, the V starts to go toward a straight line which results in pushing the headrest tubes outward tightly into the corners.

How far down are you positioning the scissor clamp? On my Vendetta, I have mine positioned so the bolt tip is pressing about in between where the rear stays are welded to the frame tube. The angles are different on the Silvio so that probably doesn't help you much but you might try moving the clamp assembly further toward the free ends of the headrest tube "loop" and definitely keep the rubber sleeve in place around the tubes and the clamp assembly.

HTH

-Eric

 

[John Tolhurst]

Don't take the rubber off the

Don't take the rubber off the headrest legs.

Turn the scissor jack sideways if needed.

Didn't I have a rubber loop around the scissor jack holding in place between the headrest legs? No?

Well, the picture above is what we are aiming for.

 

[Tuloose]

Compounded errors

I will try it again.
The 1st problem in understanding this clamp mechanism is that at the time I received the frame there were no instructions on assembling the head rest.
The 2nd was that the clamp was apparently placed upside down when it was shipped, leading to more confusion on my part. Also the assembly manual makes no mention of leaving the rubber tubing in place.
The 3rd would be that the cap screws are too short - maybe too short that is, since according to Eric's very helpful posting the screw might not have to be the 135mm called for in the assembly manual.
I hope so because the 140mm screw I tried to modify is not threading very well.
As I said, I'll give it another try and if it doesn't work I may request a scissors clamp with the 135mm screws.
Thanks everyone!

 

[BentBierz]

Clamp Worked for Me...

I felt like I needed three hands to do this at times but, once I got the clamp moved on the tubes to the spot I wanted, it tightened up without a hitch...pretty slick mechanism actually!

 

[bladderhead]

Waiting is hard to do.
I got

Waiting is hard to do.

I got a conversion-kit.

"I can handle it," I said, "just take it out at weekends, just for a laugh, but it's okay, I can handle it"

But the conversion-kit just wasn't enough.

Now here I am. Hollow-eyed. Got the shakes and the cold sweats. Flat broke. The only thing I can think of is the Silvio.

The conversion-kit is just a gateway drug. Now I know I am hooked.

 

[Tuloose]

Got it!

The fifth try was a charm!
The rubber tubing MUST be on the head rest tubes or the clamp will not work
The clamp does not have to make contact with the rubber tubing, the tubing is necessary for the clamp to work and it adds friction, preventing the headrest from moving.
Also the open sides of the clamp wings MUST be up.
The apex of the V of the clamp MUST point down.
The clamp can be installed once the head rest tubing is inserted in the frame.
It's a tricky maneuver - have the screw started in the barrel nut, hold the clamp in place with one hand while tightening the screw with the other.

Thanks everyone!!