adjustable seat?

[sturgeon]

This helps.  Can you folks describe HOW these seats are adjustable?

Mine works as Dusty described ...
Maybe this parts diagram will help

http://www.maxbmwmotorcycles.com/fiche/Diagrams/B0002622.png?v=07012015

Lift the spring-loaded crossbar and insert into one of 3 notches. Large rubber bumpers under the seat sit on one of the steps of the rear parts. The front seat just sits there. The rear seat snaps in behind and locks it all in place (and is not height-adjustable).

[canuguzzi]

^^^

Jack screw
.

[charlie b]

I have to say I'd never pay extra for a seat that was adjustable on the fly.  Just make it so I can insert or remove spacers to get height and fore/aft where I want it.  And make it comfortable.  I think most mfgs design seats for looks.

Like RK, I redid my own seat.  Changed from a bench to solo, 2x6 shape to tractor shape.  Modified the foam for best comfort (firm around the outside and softer under the sit bones).  When I shaped it I adjusted the form for where I wanted to sit on the bike (height and fore/aft).  Now it is comfortable for long, multiple day trips.

[rodekyll]

^^^

Jack screw
.

Right.  Jack screw.  That's what I'm using.  I couldn't remember the term so I said "worm gear".

[sturgeon]

Right.  Jack screw.  That's what I'm using.  I couldn't remember the term so I said "worm gear".

And here I thought it was the illegitimate second cousin of the sky hook.

[canuguzzi]

Right.  Jack screw.  That's what I'm using.  I couldn't remember the term so I said "worm gear".

Just be glad a worm didn't get in your jack or the word screw will drop from your vocabulary.

[rodekyll]

It could make it hard to use the seat, too.   


It looks good in that you can't see the mechanism, the jack screws and motors work strongly, the platform raises and tits evenly, and the mounting feels solid.  I should be able to use it on any tonti frame and currently with any LWB cali saddle (might work on a short one, but I haven't tried yet).  I have it bolted up now, but the real deal needs welds.  I tried, but my little mig unit won't penetrate this aluminum.  I'm going to trade a welder some power tool repair for tacking it together with a bigger machine.
I got a round of primer and sanding done on the tank and fairing.  I've handed them off to the 'boss' at the body shop for final spot work and top coating.  Except for maybe taping, I'm at the limit of my skills, so I'm getting out of the way.  I can't really mount the seat on the trike without the tank to guide the forward travel limit.  I'll have a pic or two when that happens.