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Author Topic: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)  (Read 350831 times)

Offline crazypj

  • Posts: 13446
  • Split personality, I fake being smart
Re: CB360- No Evil
« Reply #270 on: Dec 02, 2010, 05:31:27 »
Got shock apart, had to make a few special tools and will need to order a couple of things to put them back together.
Had a hell of a time getting bladder out, managed to break Schrader valve off reservoir top (knew I should have removed it before I started) >:(
 Luckily, the bit fitted into reservoir is 8 x 0.75mm thread so I can modify a standard 'bolt in' tyre valve. (after I get the Loctited bit out  ::))
Schrader is a real weird size, 7.7mm x 0.394mm pitch, only found one tap online, 70 POUNDS (about $110.00) so I ain't getting one of them  :D

 Quite surprised, they are not so badly made as I had expected, just not assembled too well.
 They do have a shim stack and are probably a knock off of something more expensive
No pics yet, maybe in morning.
 Swagger, thanks for pressure info, it will make a good starting point, any thought on suspension fluid?
 I was thinking 7.5~10 wt with 75~100psi or 5wt with 50psi?
 Rocan, looking at pics won't make you an instant expert on suspension (just letting you know before you start telling people how to fix shocks and set up suspension  ;))
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Swagger

  • DTT SUPPORTER
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  • Posts: 5513
  • Putting boot to ass since 1967!
Re: CB360- No Evil
« Reply #271 on: Dec 02, 2010, 13:03:50 »
I was reading one kats thoughts and he said 10wt (using fork oil iirc) a couple times and 125psi.
I read a forum post saying 12.5 mixed and 100psi.
I bet it's gonna be a trial and error thing. Seems like everyone thinks they are pretty stiffly sprung though......

I got a Ducati 999 (showa) rear shock and it needs to have some factory service (one of the adjusters is completely shagged...like someone used an impact driver on it or something equally ridiculous) but the fluid in it felt like 2wt mister oil!
.....there's no way that little rice cooker is going 100m/h when the work need to get up to those speeds includes a big fuck off fairing shaped like a giant cock. ~Staffy

Weiner tetanus is nothing to scoff at. ~JustinLonghorn

Offline crazypj

  • Posts: 13446
  • Split personality, I fake being smart
Re: CB360- No Evil
« Reply #272 on: Dec 02, 2010, 15:25:29 »
I think I'll probably go with 7.5w and start at 60psi, should help soften things up slightly
 Here's pic of shock in pieces, you'll have to go to photobucket to see explanation of parts

had to make a peg spanner to get piston rod out, 23.25mm C/C.
 The circular piece fits over shock body to allow a tube to be fitted so I can use nut to pull piston rod slowly and not distort body
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Rocan

  • Posts: 4874
  • "Long after I rest, my steel will live on"
Re: CB360- No Evil
« Reply #273 on: Dec 02, 2010, 22:06:20 »
Rocan, looking at pics won't make you an instant expert on suspension (just letting you know before you start telling people how to fix shocks and set up suspension  ;))

dont worry, im still VERY confused.  :D
PJ- Cafe's don't really work right until you get rolling 70mph +

Honda CB350 Project- www.dotheton.com/forum/index.php?topic=8643.0

Honda C100 Restoration- www.dotheton.com/forum/index.php?topic=38653.0

Offline JRK5892

  • Posts: 9755
    • The Powder Pro
Re: CB360- No Evil
« Reply #274 on: Dec 03, 2010, 10:20:34 »
wow! i pull shocks apart all the time and they are never that involved! i have used gas charged shocks on snowmobiles in the past but never on a bike, i do love how they work. i just spent the past hour going though your thread again, man i love how you point out the little things while building the motor, things like how the bee hive springs go in the heads... thank you!
Joe
"your life is an occasion, Stand up to it"
www.thepowderpro.com

recent builds: Hd street bob, TX cafe, KZ bratt, Goldwing tour, bratt wing, st fighter, road king, vriago bobber, chop, FXD, 1200 sporty, 1200xl sporty, GSXR, Royal enfield.. and more

Offline thompsonmx100

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Re: CB360- No Evil
« Reply #275 on: Dec 04, 2010, 00:51:59 »
If im not mistaken the pressure in the bladder should not affect your valve damping. The pressure in the bladder is meant to prevent foaming of the oil. i believe 125 maybe 150psi is the norm for shock bladders.
always a hint of danger. Like a skanky chick at a bar. You know the diseases she has will kill you, but you still want to ride the shit out of her.
Biker Babes Bobber http://www.dotheton.com/forum/index.php?topi

Offline crazypj

  • Posts: 13446
  • Split personality, I fake being smart
Re: CB360- No Evil
« Reply #276 on: Dec 04, 2010, 02:26:13 »
Your right, the gas has no effect on the valving
The gas charged bladder provides compression damping as well as displacing air from the system. (gives the piston something to 'push' against, in a basic shock the bottom of cylinder is sealed)
 The damper rod takes up space and causes the bladder to compress as it displaces oil from main cylinder.
 Usual pressure on most shocks I work on is 142psi.
The gas pressure does help to extend the shock and does make 'spring' heavier.
 A lower pressure and thinner oil although it will reduce damping, will also reduce the amount of 'spring'
 I'll see if I can find a better explanation with some pics.
« Last Edit: Dec 04, 2010, 02:33:30 by crazypj »
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Rocan

  • Posts: 4874
  • "Long after I rest, my steel will live on"
Re: CB360- No Evil
« Reply #277 on: Dec 04, 2010, 12:10:28 »
im imagining a syringe filled with pressure. as you compress it more, it gets firmer. more air pressure in there, the harder it is to press down, and shock rebounds more quickly?
PJ- Cafe's don't really work right until you get rolling 70mph +

Honda CB350 Project- www.dotheton.com/forum/index.php?topic=8643.0

Honda C100 Restoration- www.dotheton.com/forum/index.php?topic=38653.0

Offline crazypj

  • Posts: 13446
  • Split personality, I fake being smart
Re: CB360- No Evil
« Reply #278 on: Dec 05, 2010, 03:01:01 »
I'm sure that took maybe a couple hours to do and it looks better than factory.

 Yep, I made a pair today,  (slightly different design, plus shorter)
Took just about entire day (from cutting 2 x 4" long pieces off a 12" bar I bought, (got wrong size, 2.5" dia means a lot of cutting  ::))
 I've checked they fit shocks, looks dam good on shock (forot to take pic) also weighed them (8.7oz  ;D)
At least 10 hrs total time
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline tWistedWheelz

  • Posts: 3516
  • BUILT NOT BOUGHT!
Re: CB360- No Evil
« Reply #279 on: Dec 06, 2010, 11:25:43 »
I wish I had all the fun toys you have!