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Author Topic: SL / CB350 Mash Up  (Read 6583 times)

Online Sonreir

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  • Oregon
Re: SL / CB350 Mash Up
« Reply #20 on: Aug 23, 2015, 09:49:57 »
So you're replacing the swing arm?
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
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Offline maxDTM

  • Posts: 206
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Re: SL / CB350 Mash Up
« Reply #21 on: Aug 24, 2015, 23:20:04 »
1975 CB125s • 1973 CL125s scrambler: Billiwhacker • 1986 BMW 325es

Offline dynamitedave

  • Posts: 129
  • dcclassiccycles.com
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Re: SL / CB350 Mash Up
« Reply #22 on: Aug 25, 2015, 11:10:55 »
To lower the axle and move it back I cut up another swing arm and took the mounting plates out and welded them to the existing axle plate and filled in the blanks with 1/4" plate.  I still have more welding and reinforcing to do but I'll do that after I take the bike all apart. You can't really see it in the picture.

I mounted a SL350 front fender, some thick dirt bike handle bars I had, a CL350 gas tank, I welded on some side covers to hide the battery from view, and extended the exhaust pipe and mounted two Harley Sportster mufflers. I think they are a good size but they are heavy. I ordered a Honda XR450 rear fender, it should be here today.

The rear shocks are kinda soft.  They aren't too bad actually but I was experimenting and I cut a one inch spacer and put it them on top of the spring.  Now they are a little too stiff so I'm going to cut half inch spacers tonight and try them out. 


Offline xb33bsa

  • Posts: 7727
Re: SL / CB350 Mash Up
« Reply #23 on: Aug 25, 2015, 12:06:32 »
that swingarm might work but the twisting loads on the main tubes is a lot higher than they were designed for because of the silly  offset like that. you have mooved the twisting loads way off centerline of the main tubes giving it leverage that multiplies the forces  :'(....the shocks will not work at all ..you need shocks with a much stiffer overall rate on the spring no amount of preload is going to fix that issue.you also need a shock with much firmer damping now you have increaSED REAR WHEEL TRAVEL BY AT LEAST 50%
it is not to late to scrap what you have done and just do a proper swingarm with longer shocks

Offline dynamitedave

  • Posts: 129
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Re: SL / CB350 Mash Up
« Reply #24 on: Aug 25, 2015, 12:40:16 »
that swingarm might work but the twisting loads on the main tubes is a lot higher than they were designed for because of the silly  offset like that. you have mooved the twisting loads way off centerline of the main tubes giving it leverage that multiplies the forces  :'(....the shocks will not work at all ..you need shocks with a much stiffer overall rate on the spring no amount of preload is going to fix that issue.you also need a shock with much firmer damping now you have increaSED REAR WHEEL TRAVEL BY AT LEAST 50%
it is not to late to scrap what you have done and just do a proper swingarm with longer shocks

I pretty much disagree with everything about you, except your avatar.  I'll build the bike and ride it around and the world well still spin. Someday I might move the shock mounts back and use longer shocks but for now I'm sticking to my original design.  I hope you find happiness somewhere out there and someday discover the fantastic, wonderful world of proper case and punctuation.  Good day sir.

Offline xb33bsa

  • Posts: 7727
Re: SL / CB350 Mash Up
« Reply #25 on: Aug 25, 2015, 12:47:12 »
what i have stated is indisputable fact, written in stone ......educate yorself about suspension and frame geometry you will be better off for it and hopefully not be killed outright on the deathtrap you are building or worse cause an accident involving innocent civies

Offline redwillissuperman

  • Posts: 997
  • Keep it simple- engine, wheels, bars
Re: SL / CB350 Mash Up
« Reply #26 on: Aug 25, 2015, 14:47:38 »
I pretty much disagree with everything about you, except your avatar.

We all agree on the avatar.

Offline WhyNot

  • Posts: 970
  • ~~~If it ain't raining, I'm riding~~{iii}?~~prost~
Re: SL / CB350 Mash Up
« Reply #27 on: Aug 25, 2015, 15:23:23 »
We all agree on the avatar.

Absolutely......just wish I could zoom in on it a little better........ >:(






Wanna see what size tire that is................... :P
2006 Harley Davidson Heritage Softail
1975 Honda CB750K5 needs carb work
1974 Honda CB350F2 needs tins painted (being lazy)
1972 Honda CB175K2 roller no engine
1972 Honda CB/CL350 Engines need roller
1972 Honda CB100K2 needs kicker shaft
1990 Mitsubishi MM needs engine rebuild

Offline Turnturtle

  • Posts: 63
Re: SL / CB350 Mash Up
« Reply #28 on: Aug 25, 2015, 16:38:52 »
Here you go... You can check out much more than the tire size!  http://joyreactor.cc/post/1961800

Offline WhyNot

  • Posts: 970
  • ~~~If it ain't raining, I'm riding~~{iii}?~~prost~
Re: SL / CB350 Mash Up
« Reply #29 on: Aug 26, 2015, 06:25:04 »
Here you go... You can check out much more than the tire size!  http://joyreactor.cc/post/1961800

oh well, it's restricted on the work puter.......
2006 Harley Davidson Heritage Softail
1975 Honda CB750K5 needs carb work
1974 Honda CB350F2 needs tins painted (being lazy)
1972 Honda CB175K2 roller no engine
1972 Honda CB/CL350 Engines need roller
1972 Honda CB100K2 needs kicker shaft
1990 Mitsubishi MM needs engine rebuild