Word of warning re: powder coating

Need some help? Put your question up here. Many years of experience on the board to help you get up and running.

Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan

Post Reply
User avatar
joolstacho
To the on ramp
Posts: 395
Joined: Sun Jul 13, 2014 7:55 pm
Country: Australia
Suzuki 2-Strokes: AS50, GS500, GT500, ex GSXR750 slabbie
Location: Greendale Vic, Australia
Contact:

Word of warning re: powder coating

Post by joolstacho »

Just a little thing to be aware of, I just had my GT500 frame powder coated. (At last I can start the build :clap: ).
I masked off but didn't remove the swing arm fibre bushes.
It looks like the heat of the powder coating curing has slightly shrunk the fibre bushes. They are now a slightly looser fit in the swing arm, and the steel bushes which slide into the fibre bushes are tight in the fibre bushes. (The guy who did the coating said they cure at around 200 degrees C).
Nothing I can't fix with elbow-grease and careful fitting, but just a tip for anyone else doing the job.
User avatar
Alan H
Moto GP
Posts: 3250
Joined: Thu Feb 16, 2012 11:50 am
Country: England
Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
Location: The Republic of South Yorkshire

Re: Word of warning re: powder coating

Post by Alan H »

Most powder coaters recommend solid bushes are removed.
I left the rubber pillion footrest/silencer hangers in on both 550s frames I had done without problem though.
Think of how stupid the average person is, then realise that half of them are more stupid than that.
User avatar
joolstacho
To the on ramp
Posts: 395
Joined: Sun Jul 13, 2014 7:55 pm
Country: Australia
Suzuki 2-Strokes: AS50, GS500, GT500, ex GSXR750 slabbie
Location: Greendale Vic, Australia
Contact:

Re: Word of warning re: powder coating

Post by joolstacho »

I anticipated and had no prob at all with rubber mountings such as the rear 'guard mounts at the rear of the GT500subframe, (which I didn't remove because I know what a bastard they are to replace).
No, it was specifically the fibre outer swing arm bushes shrinking with the heat that I wanted to give people the heads up on.
MarkH
On the street
Posts: 23
Joined: Mon Aug 10, 2015 8:43 am
Country: US
Suzuki 2-Strokes: 75 Suzuki GT250, 74 Kawasaki H2

Re: Word of warning re: powder coating

Post by MarkH »

Yup, joolstacho is right!!!

I did the exact same thing. I didn't realize that those bushings were there (the match perfectly to the swing arm).

They got melted too with powercoating. Even the powercoat guy didn't see them. Ended up ordering some new ones (ebay).
http://www.machinesofman.com

75 Suzuki GT250, 74 Kawasaki H2 750, 82 Suzuki RM 125, 00 Kawasaki KX 250, 15 Honda CB1000R
User avatar
joolstacho
To the on ramp
Posts: 395
Joined: Sun Jul 13, 2014 7:55 pm
Country: Australia
Suzuki 2-Strokes: AS50, GS500, GT500, ex GSXR750 slabbie
Location: Greendale Vic, Australia
Contact:

Re: Word of warning re: powder coating

Post by joolstacho »

Thing is that if you try to remove the bushes with drifts I think you'd have to pretty well destroy them to get them out, (being fibre).
And leaving them in will shrink them, rendering them useless anyway.
"Damned if you do damned if you don't".
Post Reply