Author Topic: "fixin" a seat (Read 11279 times)

Industrial Cafe · « **on:** May 07, 2009, 03:49:05 PM »

I got a Yamaha Seca tail, and it was too wide, but I liked the profile, so I decided to cut a pie piece out of it, heat it up at the apex, and fold it shut.
It looks really cool now, with the little point at the end of the duck tail- the only problem is, I dunno how to re-connect the 2 halves.... it's plastic, I wonder if a body shop could plastic-weld it back together... hmm

i dunno.

OPINIONS?

here it is, sitting on the frame rails before the cut.

texaninseattle · « **Reply #1 on:** May 07, 2009, 03:57:09 PM »

fiberglass?

Industrial Cafe · « **Reply #2 on:** May 07, 2009, 04:03:52 PM »

Quote from: MOTO-BIKES on May 07, 2009, 03:52:13 PM

You get that bad boy off ebay just recently? I was watching one just like that on ebay recently... I like the profile aswell..

yeah thats the one from ebay. but I emailed the seller after nobody bought it and went around ebay.

I got it for 30 bucks shipped.

Quote from: texaninseattle on May 07, 2009, 03:57:09 PM

fiberglass?

no it smells and melts like ABS plastic

texaninseattle · « **Reply #3 on:** May 07, 2009, 04:05:40 PM »

no, i meant repair it with fiberglass. Sorry, that want very clear.

Industrial Cafe · « **Reply #4 on:** May 07, 2009, 04:08:12 PM »

IHWillys · « **Reply #5 on:** May 07, 2009, 04:08:22 PM »

Quote from: Industrial Cafe on May 07, 2009, 03:49:05 PM

... it's plastic, I wonder if a body shop could plastic-weld it back together...

Perhaps. There's a bumper repair service located near here and they mostly fix plastic bumpers these days(used to do the metal work and chroming). They do indeed "weld" some of the plastics.

Otherwise, I think fiberglass with epoxy resin underneath, epoxy in the gap and body filler on top to make it smooth.

Ken

mystic_1 · « **Reply #6 on:** May 07, 2009, 04:16:47 PM »

Goon posted "side cover fix BEST EVER!" back in april.

ABS Shavings + MEK = magic plastic glue.

http://forums.sohc4.net/index.php?topic=49736.0;all

mystic_1

Scrubs · « **Reply #7 on:** May 07, 2009, 04:40:19 PM »

Quote from: mystic_1 on May 07, 2009, 04:16:47 PM

Goon posted "side cover fix BEST EVER!" back in april.

ABS Shavings + MEK = magic plastic glue.

mystic_1

Beat me too it

If you can't get hold of the mek - acetone works very well also.
drop ABS shavings into Aceton let melt and form a thick liquid then apply but be quick because the working time is pretty fast after it begins to thicken - leave to cure for 24 hours.

Alan F. · « **Reply #8 on:** May 07, 2009, 04:40:57 PM »

If that tail is made of ABS this might be worth a read. Craig Vetter has a fairing repair kit available.

http://www.craigvetter.com/pages/Vetter_Fairings/Repair%20Windjammer%2045966.html

Industrial Cafe · « **Reply #9 on:** May 07, 2009, 04:52:28 PM »

hmm... wouldn't the halves of the tail have to be "all melty" too, for it to work the best?

that mek is new to me, i'll have to look around.

i have some strange resin for joining fiberglass pipe, I wonder if I could use that. it heats up and melts the fiberglass while it bonds.

edit: just went out in the garage... can't find it
think i threw it behind the bench.

mystic_1 · « **Reply #10 on:** May 07, 2009, 04:55:14 PM »

I'm thinking the MEK in the paste you mix up will etch into the edges of the plastic a bit. If you want to, maybe paint some pure MEK on the edges to soften them up a bit then wipe the excess away before applying the paste mixture.

mystic_1

Industrial Cafe · « **Reply #11 on:** May 07, 2009, 04:57:05 PM »

that was a thought i had as well- we're on the same page mystic.

Alan F. · « **Reply #12 on:** May 07, 2009, 05:22:45 PM »

Wouldn't you want to reinforce the seam with a slab of similar material like Vetter did in that link?

Industrial Cafe · « **Reply #13 on:** May 07, 2009, 05:32:10 PM »

i do have a little spare slab.

Soos · « **Reply #14 on:** May 08, 2009, 08:24:29 AM »

Quote

that mek is new to me, i'll have to look around.

Home dpot, and lowes has MEK.
Methyl Ethly Ketone is the full name.
Should do wonders.

Just don't inhale the fumes!!!
Used to work with this stuff... nasty.
It will melt most plastics

l8r

mystic_1 · « **Reply #15 on:** May 08, 2009, 10:23:25 AM »

... and don't smoke while you do this.

mystic_1

bikerbart · « **Reply #16 on:** May 08, 2009, 10:41:38 AM »

better yet,wear a mask with filters.trust me,my lungs are shot.

Industrial Cafe · « **Reply #17 on:** May 08, 2009, 10:46:52 AM »

I have a huge fan that creates a strong cross breeze thru the open ended garage.

Industrial Cafe · « **Reply #18 on:** May 08, 2009, 03:26:27 PM »

is this where it goes?

I'll get started making some shavings and do-er-up tonight.

wish me luck!!!

Industrial Cafe · « **Reply #19 on:** May 08, 2009, 04:17:53 PM »

makin the soup

Industrial Cafe · « **Reply #20 on:** May 08, 2009, 04:38:10 PM »

ok, so those chunks were too big, but they are acting as a filler of slivers, so I think it's going well.

mystic_1 · « **Reply #21 on:** May 08, 2009, 05:28:25 PM »

Yup, looks way too big.

Goon used a file to make his shavings, or rather filings

[quote author = Goon 1492 link=http://forums.sohc4.net/index.php?topic=49736.msg526584#msg526584]After a little reading in kghost's thread I took my laminate file and made some shavings out of some scrap white abs I have and laid it out on a polyethylene lid(so it wouldn't melt or stick to it) and used my needle bottle to spray it down with the mek, worked just like he stated, made a pile of goo out of it. I let that set for about 30 seconds because mek has a pretty good evaporation rate from what I have seen so far, I then laid the first bead down to fill[/quote]

and it looks like he was going off a post by kghost, who used a razor blade, so he had shavings rather than filings lol:

Quote from: kghost on May 09, 2005, 03:14:46 PM

Take a razor blade and shave down a piece of the old plastic. Put the shavings in a litle jar of MEK until they dissolve. Use the resultant paste/MEK to patch the cracks. Stop drill the crack first. Use a small paint brush to spread the paste into the crack.

mystic_1

Industrial Cafe · « **Reply #22 on:** May 08, 2009, 06:26:42 PM »

well, i had alot of time on my hands so I used my stainless "Medicine Grinder" and kept adding MEK as it evaporated, to make a sort of slurry.
almost all the chips turned into liquid.

I started making filings, and it was taking too long to make a huge enough pile to fill the long wide gap I had created.

all that should grind off.

mystic_1 · « **Reply #23 on:** May 08, 2009, 06:35:42 PM »

Looking good. If it were me, and mind you I've never done this before, I'd personally let that dry off for a good long time (days), grind it back a bit to just below desired level, then repeat the process with a thinner mixture to sort of "skim coat" it.

In the meantime, do you have a jigsaw and some old ABS plastic laying around? Sounds like a great way to make ya some plastic sawdust.

Did you paint MEK onto the edges? If so what effect did this have if any?

Keep us posted.

mystic_1

Industrial Cafe · « **Reply #24 on:** May 08, 2009, 06:49:10 PM »

I dripped MEK on the edges with a syringe, over and over while mixing the abs slurry that I will call "glue". It turned the edge very soft, soft enough to poke the syringe through.

while I was dripping the "glue" on the piece, I also swirled the newly softened plastic sides into each other, sorta like sewing them together.
dunno if I shoulda done that but... eh.

I forgot to mention that I have a piece of heavy gauge clear tape on the back of the crack, to stop everything from dripping thru.

I'm not gonna touch that thing till the middle of next week, but When the time rolls around I am going to do what you were saying, cause there might be trapped air bubbles in there that could stand to be melted and filled with a thinner coat.

I don't wanna eff this up.

News:

Author Topic: "fixin" a seat (Read 11279 times)