Author Topic: Side cover repair  (Read 625 times)

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Offline Scott S

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Side cover repair
« on: July 18, 2022, 07:29:04 AM »
 What's the best way to repair this and save the original paint?
 Doesn't have to be perfect or even completely invisible. Just not sloppy, and I want to save the OG paint and patina (it's a really nice set of Candy Jade Green bodywork!).

 Is there a person who is the "go to" for plastic repair?
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Online bryanj

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Re: Side cover repair
« Reply #1 on: July 18, 2022, 07:36:52 AM »
Get some woven glass mat fabric, rough up the inside and lay the mat with an epoxy, here in UK i use araldite rapid
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline jgger

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Re: Side cover repair
« Reply #2 on: July 18, 2022, 07:56:34 AM »
I would glue it with super glue and baking soda first, then reinforce it from the back. Make sure you have good alignment of the pieces because this mix goes off fast! Put the glue on one side san the baking soda on the order piece. Press them together and hold for about 5 seconds. You might have ti very lightly moisten the side with the baking soda to get it to stay on the piece.

I used this concoction on a drill trigger handle for a Hole Hog ( gear reduction 1/2" drill) and used to run 18" auger bits up to 1 1/4" in 6x beams. It didn't last forever, but held foe about 6 months of service. That should  hold a side cover.
"The SOHC4 uses a computer located about 2-3 ft above the seat.  Those sometimes need additional programming." -stolen from  Two Tired

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Online BenelliSEI

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Re: Side cover repair
« Reply #3 on: July 18, 2022, 09:06:29 AM »
Clean the back really well, I usually sand it clean with my dremel and a small sanding disc. Superglue in place (as suggested above) than fill in the back with 2-3 layers of JB Weld, spread evenly.....
Good Luck, well worth saving!

Offline carnivorous chicken

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Re: Side cover repair
« Reply #4 on: July 18, 2022, 09:12:37 AM »
I just use regular epoxy on the backside and surface of the break and painter's (blue) tape to hold it together, then add more epoxy to the back when it's dry. And a drop of oil to the tabs if it broke when you were taking it off.

Online newday777

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Re: Side cover repair
« Reply #5 on: July 18, 2022, 09:26:32 AM »
The covers are made of ABS plastic.  The best repair is made using black ABS cement from plumbing department. I did it on a 750 cover a year ago putting in a piece from a second cover to replace the busted out and missing so I made a template to cut the new piece to. Then sanded all the paint off the backside down to the bare ABS an inch or more past the seams so the cement does it's actual welding bonding of the pieces in the seams and to overlap mesh tape over the seam and cover it with light coats od the cement,  24 hrs between coats to off gas the cement. You can use blue painters tape to hold the pieces in place while the cement drys(or use super glue in the seam first to do a quick hold) follow up with the cement and mesh tape and 4-5 light coats of cement,  24 hrs between each light coat for a strong repair.
Sorry my phone took too big of picture size to post on this forum.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline Scott S

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Re: Side cover repair
« Reply #6 on: July 18, 2022, 10:19:02 AM »
And a drop of oil to the tabs if it broke when you were taking it off.

 It was already broken. Held together with some ancient concoction that looked like bubblegum and crumbled easily.
 I always put a light smear of grease on the tabs and the rubber grommets on my bikes.
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Online bryanj

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Re: Side cover repair
« Reply #7 on: July 18, 2022, 10:43:07 AM »
I find epoxy or cement alone cracks again which is why i use the woven glass fabric as reinforcement
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline carnivorous chicken

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Re: Side cover repair
« Reply #8 on: July 18, 2022, 10:47:38 AM »
And a drop of oil to the tabs if it broke when you were taking it off.

 It was already broken. Held together with some ancient concoction that looked like bubblegum and crumbled easily.
 I always put a light smear of grease on the tabs and the rubber grommets on my bikes.

They just don't make bubblegum like they used to.