Honda Twins banner

1 - 3 of 3 Posts

·
Premium Member
Joined
·
1,930 Posts
Discussion Starter · #1 ·
Hi all,

A 1970 SL350K0 basket case has fallen into my lap. I want to get the frame blasted and powder coated to stop the rust, but I have a couple questions first. At the top of the pressed steel center column, it appears that somebody has used a carbide disc to do some cutting. Maybe the frame came this way from the factory, but it looks suspicious. Here is a view from the rear, looking forward. To the lower right, there is a sharp burr rolled into the inside of the pipe from the cutting action:



From either side, the profile of the cutting wheel is apparent:





So, I don't know if any of this makes any difference. When the fuel tank is back on, this area will be hidden under the rear mount. Maybe I just need to grind the sharp edges and proceed with the blast and powder coat?

If this area was cut, what did they cut off? Was the frame originally boxed shut on top? Maybe somebody needed a place to hide their weed?



Another question is the bottom of the front down-tube. It looks like it was made this way, but I didn't think Honda did stuff like this.





Is it normal to see the end of that tube cut at an angle like this?

Thanks!
 

·
Registered
Joined
·
13,085 Posts
I can't speak to the first picture specifically, but the picture of the front downtube of the frame looks typical for the 350. The SL350K0 used basically the same frame as a CB350 of the day. It wasn't until the K1 that the SL had more of a frame of its own. Honda was progressing through the years from the pressed metal box frames of the early to mid '60s on many of the bikes to a combination of pressed sections and tubes welded together. Here are a few pics of the area you mentioned first - looks like a little might have been removed, but the question why is still unclear if so...

https://mascis350.files.wordpress.com/2013/08/20130821-110010.jpg

https://vintageocd.com/2012/05/30/1971-honda-cb350-cafe-racer-project-episode-3-4/

http://www.caferacer.net/forum/attachments/technical/1591d1360528850-rear-tail-loop-proper-install-t2ec16rhjiye9qucoo2-bqtnfilorg-60_57.jpg
 

·
Premium Member
Joined
·
1,930 Posts
Discussion Starter · #3 ·
Thanks for the pictures. I guess my frame is normal, and I won't worry about it then.
 
1 - 3 of 3 Posts
Top