Author Topic: How to repair shattered side cover?  (Read 1965 times)

0 Members and 1 Guest are viewing this topic.

Offline B.O.X.N.I.F.E.

  • The Stumped
  • Expert
  • ****
  • Posts: 1,137
How to repair shattered side cover?
« on: July 14, 2010, 02:17:11 PM »
I've seen some great threads on repairing cracked side covers, but mine had been shattered at one point and is missing an entire little piece.

Are there any proven methods to build up this gap? Not sure what products are out there.
1974 CB550

32 days and 5,536 miles on a CB550...

http://kerncountykid.blogspot.com/

and a couple years later, 38 days and 9,102 miles...

Forever West

... and all of it in a 4 mintue video

<a href="Not a valid vimeo URL">WWYY?[/url]

Offline OldSchool_IsCool

  • Really feeling like an
  • Old Timer
  • ******
  • Posts: 4,350
  • WARNING: Objects in mirror appear to be LOSING!
Re: How to repair shattered side cover?
« Reply #1 on: July 14, 2010, 02:29:29 PM »
Tagging up because enquiring minds want to know!!
Can I have a motorcycle when I get old enough?
If you take care of it.
What do you have to do?
Lot’s of things. You’ve been watching me.
Will you show me all of them?
Sure.
Is it hard?
Not if you have the right attitudes. It’s having the right attitudes that’s hard.

Offline 333

  • Time for change
  • Really Old Timer ...
  • *******
  • Posts: 7,557
  • Mail List Member #162 - Call me Stan
Re: How to repair shattered side cover?
« Reply #2 on: July 14, 2010, 02:53:18 PM »
Time to learn fiberglasing.
Go metric, every inch of the way!

CB350F0  "Scrouching Tiger"
CT70K0    "Sneezing Poodle"

www.alexandriaseaport.org

Offline Gordon

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 12,114
  • 750K1, 550K2
Re: How to repair shattered side cover?
« Reply #3 on: July 14, 2010, 03:00:32 PM »
Not to discourage you from learning how to repair it yourself, but since you're already going to have to repaint it why not buy a new or good used one? 

Offline Nikkisixx

  • Expert
  • ****
  • Posts: 839
Re: How to repair shattered side cover?
« Reply #4 on: July 14, 2010, 03:24:54 PM »
A fiberglass repair kit is less than $20 at the local hardware.  A new cover or good used one is not that inexpensive.  I glass the entire back side of covers, and they are much stronger after doing so.
It is a proven fact that modifying a SOHC Honda in any way will bring on the apocalypse.

Offline Gordon

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 12,114
  • 750K1, 550K2
Re: How to repair shattered side cover?
« Reply #5 on: July 14, 2010, 03:30:50 PM »
Is the missing piece where the mounting tab was, or is that on the other corner?

Offline FrankenFrankenstuff

  • Master
  • *****
  • Posts: 2,396
    • FrankenBike Stuff Store
Re: How to repair shattered side cover?
« Reply #6 on: July 14, 2010, 04:55:53 PM »
They were made out of crappy old ABS material. Fiberglass sticks well if you clean, sandblast, wax and grease remover, then scuff. I actually have fixed a couple simple cracks using Methalene Chloride. It chemically melts the crack sealed. Dont try to use Bondo, or some cheapo' plastic epoxy....your just covering up the cracks.

Offline BeSeeingYou

  • Old Timer
  • ******
  • Posts: 3,913
Re: How to repair shattered side cover?
« Reply #7 on: July 14, 2010, 05:26:51 PM »
PVC/ABS cement used for plumbing fitting will work to glue cracks together.  It worked well for me when I repaired a crack and then I beefed up the backside with epoxy resin and fiberglass cloth.  Looks like your panel could benefit from that.  Make sure you get epoxy and not polyester (fiberglass) resin which may be what comes in small auto body type repair kits.  Polyester is fine for some things but epoxy will bond better with PVC/ABS plastic.  Sand the backside and lay on some cloth and use a cheap foam brush to apply the epoxy.  It may be easier to give the backside a quick coat first as that will help hold the cloth in place and help out the wetting process.  You can also get many additive powders for epoxy to alter it's properties and handling characteristics. Add low density filler to make a putty that will sand easier and high density filler to make structural repairs like tabs.  I work with boats so I always have good quality epoxy laying about.  West System or Systems Three is what I use.  At one time these companies would send out small starter/test kits cheap don't know if they still do.  I could probably get a small kit together for you if you have a hard time finding what you need.

crack glued with PVC/ABS cement.


Beefed up the tabs with high density filler.


« Last Edit: July 14, 2010, 05:36:50 PM by srust58 »

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,335
  • Central Texas
Re: How to repair shattered side cover?
« Reply #8 on: July 14, 2010, 05:37:12 PM »
Box - is that a left or right - I may have an extra.

Another member just sold a blue one for $25.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline FrankenFrankenstuff

  • Master
  • *****
  • Posts: 2,396
    • FrankenBike Stuff Store
Re: How to repair shattered side cover?
« Reply #9 on: July 14, 2010, 05:38:06 PM »

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,335
  • Central Texas
Re: How to repair shattered side cover?
« Reply #10 on: July 14, 2010, 05:41:17 PM »
Box - is that a left or right - I may have an extra.

Another member just sold a blue one for $25.


http://forums.sohc4.net/index.php?topic=73580.0
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline BeSeeingYou

  • Old Timer
  • ******
  • Posts: 3,913
Re: How to repair shattered side cover?
« Reply #11 on: July 14, 2010, 05:41:43 PM »


Yeah it's probably easier to get some repro's and with the cost of quality epoxy, fillers, and cloth just as cheap.  I take it that is what your post is saying.  ;D

Offline B.O.X.N.I.F.E.

  • The Stumped
  • Expert
  • ****
  • Posts: 1,137
Re: How to repair shattered side cover?
« Reply #12 on: July 14, 2010, 05:46:30 PM »
The F series covers aren't reproduced yet.

There were some in the for sale section I just missed. The set and the single ones are all sold, I've PM'd them.
1974 CB550

32 days and 5,536 miles on a CB550...

http://kerncountykid.blogspot.com/

and a couple years later, 38 days and 9,102 miles...

Forever West

... and all of it in a 4 mintue video

<a href="Not a valid vimeo URL">WWYY?[/url]

Offline david 750f

  • Expert
  • ****
  • Posts: 827
  • 1976 CB750F
Re: How to repair shattered side cover?
« Reply #13 on: July 15, 2010, 12:01:52 AM »
I think you can get repo 550F side covers at LPM.
http://lpmreplicaparts.com/honda/CB550F/sidep.html
1976 CB 750F

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,335
  • Central Texas
Re: How to repair shattered side cover?
« Reply #14 on: July 17, 2010, 09:01:35 AM »
I think you can get repo 550F side covers at LPM.
http://lpmreplicaparts.com/honda/CB550F/sidep.html

Not a bad price, $102 for a pair shipped to US.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline B.O.X.N.I.F.E.

  • The Stumped
  • Expert
  • ****
  • Posts: 1,137
Re: How to repair shattered side cover?
« Reply #15 on: July 19, 2010, 03:44:51 PM »
I think you can get repo 550F side covers at LPM.
http://lpmreplicaparts.com/honda/CB550F/sidep.html

Wow, that's where I'm going for side covers from now on.

I can't find Methalene Chloride anywhere local, will MEK work for melting cracks back together? I looked for Rock Miracle, a methalene chloride product, but can't find that either.
1974 CB550

32 days and 5,536 miles on a CB550...

http://kerncountykid.blogspot.com/

and a couple years later, 38 days and 9,102 miles...

Forever West

... and all of it in a 4 mintue video

<a href="Not a valid vimeo URL">WWYY?[/url]

Offline octagon

  • Hot Shot
  • ***
  • Posts: 261
Re: How to repair shattered side cover?
« Reply #16 on: July 19, 2010, 03:56:59 PM »
b weld works well - you can lay a wide layer of it on either side of a crack on the back side of the cover, and then pat fiberglass cloth into it - the jb weld will slowly soak into the cloth - makes a light very strong repair.

Offline B.O.X.N.I.F.E.

  • The Stumped
  • Expert
  • ****
  • Posts: 1,137
Re: How to repair shattered side cover?
« Reply #17 on: July 20, 2010, 08:53:25 PM »
I ended up using this method, sort of. Sourced a pile of cracked covers from a forum member, sanded them and used the clear Oatey cement. I had to use crappy insulation grade fiberglass, but will get the good stuff next time.

Acetone and that cement pretty much melt the ABS back together, this is the best way to do it in my opinion. Will post pics when done.

PVC/ABS cement used for plumbing fitting will work to glue cracks together.  It worked well for me when I repaired a crack and then I beefed up the backside with epoxy resin and fiberglass cloth.  Looks like your panel could benefit from that.  Make sure you get epoxy and not polyester (fiberglass) resin which may be what comes in small auto body type repair kits.  Polyester is fine for some things but epoxy will bond better with PVC/ABS plastic.  Sand the backside and lay on some cloth and use a cheap foam brush to apply the epoxy.  It may be easier to give the backside a quick coat first as that will help hold the cloth in place and help out the wetting process.  You can also get many additive powders for epoxy to alter it's properties and handling characteristics. Add low density filler to make a putty that will sand easier and high density filler to make structural repairs like tabs.  I work with boats so I always have good quality epoxy laying about.  West System or Systems Three is what I use.  At one time these companies would send out small starter/test kits cheap don't know if they still do.  I could probably get a small kit together for you if you have a hard time finding what you need.

crack glued with PVC/ABS cement.


Beefed up the tabs with high density filler.



1974 CB550

32 days and 5,536 miles on a CB550...

http://kerncountykid.blogspot.com/

and a couple years later, 38 days and 9,102 miles...

Forever West

... and all of it in a 4 mintue video

<a href="Not a valid vimeo URL">WWYY?[/url]