Seca900 instrument cluster broken post

The title says a lot, now pics:





The edges of the break don't match perfectly, so the glue will have to fill small gaps here and there, and it will have to be thick enough not to drip in the speedo mechanism.

Also it looks like the post was held with visegrips a bit too strongly so the post itself is damaged and may need to be reinforced internally.

What are your suggestions for the type of glue to use?

PO temporarily solved the problem by zip-tying the upper speedo connection to the fairing bracket to stabilize this side of the cluster...

 

I'd use this stuff

http://www.plastex.net


I'd also lockwire it together in several places

 

Use an old soldering iron, or at least an old tip. Weld it back together. It will be stronger than new, but twice as ugly (not really, but making it look good takes practice). The gaps will be filled along the way, and you can reinforce it with epoxy if you feel the need to. The instrument cluster on my 750 is essentially nothing but welded plastic (though I do have an excellent spare for the long-off day when I decide to do a full restoration). If you find that you need filler material send me a PM and I can mail you some scrap from a broken cluster.

 

I'm pretty sure I have a soldering iron.

I'll probably begin with using grated ABS mixed with acetone as a glue to put both parts back together then I may solder on 6 or 8 specific spots all around the post to help make it stronger.

Thanks for the tip. It will look ugly anyhow!

 

I glued pieces together late yesterday evening, using a homemade mix of grated ABS (from the cheapest part available in the plumbing department) and acetone, applied liberally inside the post and all along mating surfaces and then outside the post on critical spots.

It feels so solid this morning that I dont feel the need to use the soldering iron.

I may use a thin wire to make sort of a coil around the post then coat it with a second layer of ABS to make it even stronger.

 

You may try wire bug screen as reinforcement with the glue.

 

Thanks for sharing, I may go that way.

 

I would use fiberglass mat and resin to reinforce the repair.

CN

 

Due to the shape or the broken post and the way it connects to the rest of the cluster, using rolled wire doesn't seem inappropriate. The bug screen may or may not work, it would cover only half a turn.

I have a very short section of post to work with, and the crack is at the base:

 

I find that fiberglass doesn't stick well to plastic.

 

I finally used metal bug screen on 3/4 turn around the post, with more grated ABS-acetone mix to make the screen stick to the post and to cover it. Then I just added some more ABS "glue" on the remaining 1/4 turn where screen was not appropriate.

It will be a lot stronger than the original!

TOughest part of the job: grating the ABS, man that stuff is hard!

 

Here is the fix, reinforced with metal bug screen and a second layer of shredded black ABS-acetone mix:





Thanks to those who gave advices and tips!