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Author Topic: 75 CB360 - bad omen "yatagarasu" build  (Read 39959 times)

Offline teazer

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Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #190 on: Apr 11, 2018, 01:26:04 »
Wow, whoever had that bike before you was a special kind of stupid.  ;D

That's odd.  In my experience, most are that way....

Offline MiniatureNinja

  • Posts: 522
Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #191 on: Apr 11, 2018, 02:54:08 »
Indeed. He was stupid for letting his electrician friend "help" him turn it into a #caferacer he was the second owner bought it in '84.

Sent from my SM-G955U using DO THE TON mobile app

'75 Honda CB360 - thread

Offline MiniatureNinja

  • Posts: 522
Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #192 on: Apr 11, 2018, 19:16:11 »


Got a steering damper in from Ebay $9 for a suzi gsxr 07 damper... nice.
'75 Honda CB360 - thread

Offline crazypj

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Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #193 on: Apr 11, 2018, 23:33:15 »
Make sure it's working properly, they have a nasty habit of either leaking or the internal piston 'comes loose'
Neevo (Idiot Down under CB400f) re-built his, think he gives seal size.
I've got a couple of them, needed air bled out (and topped up with suspension fluid) but otherwise OK.
Use a 5ml syringe as bleed/fill hole is only 3mm. 
'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 MiniatureNinja

  • Posts: 522
Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #194 on: Apr 12, 2018, 00:18:34 »
Make sure it's working properly, they have a nasty habit of either leaking or the internal piston 'comes loose'
Neevo (Idiot Down under CB400f) re-built his, think he gives seal size.
I've got a couple of them, needed air bled out (and topped up with suspension fluid) but otherwise OK.
Use a 5ml syringe as bleed/fill hole is only 3mm.
It seems to be working great, no bubbly sounds from it and very smooth, also no leaks. However. I do plan to change the fluid, using a 5w fork oil from what I have read that is the proper stuff.
'75 Honda CB360 - thread

Offline crazypj

  • Posts: 13467
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Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #195 on: Apr 12, 2018, 10:41:38 »
Fork oil can 'break down' too fast, you need rear shock fluid.
 Fork doesn't get as hot as rear damper (more surface area less movement except in MX or maybe racing) so viscosity doesn't change as much
It's the lower change in viscosity due to heat that makes the 'suspension fluid' way more expensive ($30~$40 liter instead of $10~$15 liter)
I forget details, haven't looked it up since 2012 or so. 
You can look up viscosity index and compare it to viscosity
'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 MiniatureNinja

  • Posts: 522
Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #196 on: Apr 12, 2018, 14:18:38 »
Fork oil can 'break down' too fast, you need rear shock fluid.
 Fork doesn't get as hot as rear damper (more surface area less movement except in MX or maybe racing) so viscosity doesn't change as much
It's the lower change in viscosity due to heat that makes the 'suspension fluid' way more expensive ($30~$40 liter instead of $10~$15 liter)
I forget details, haven't looked it up since 2012 or so. 
You can look up viscosity index and compare it to viscosity

Thanks for the heads up. Will get some of the proper stuff for it. Since I am missing my April 18th deadline I have until May 16th for the next bike meet - i have a little time to make this right.

I bought some Redline 5w Suspension Fluid - also some 10w, just in case I don't know what I am doing (which is likely)
« Last Edit: Apr 12, 2018, 14:34:12 by MiniatureNinja »
'75 Honda CB360 - thread

Offline crazypj

  • Posts: 13467
  • Split personality, I fake being smart
Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #197 on: Apr 13, 2018, 10:15:26 »
Redline is good stuff, I have a chart somewhere of 'top 100'
Almost all viscosities are in top 25, thinner 'thins' less. I think the 20w was at 25~30  on chart?
It needs to get pretty hot to have noticeable loss of viscosity  8)
 I have been using Silkolene Pro Suspension Fluid but it's pretty expensive now so will probably switch
 
« Last Edit: Apr 13, 2018, 10:18:19 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 MiniatureNinja

  • Posts: 522
Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #198 on: Apr 15, 2018, 16:25:35 »


some progress: all the bolts and hardware have been cleaned of grease and grime, no one wants to see that so I didn't take any pics.
I did manage to snap this from the video I am making about the bike build... tapping the grease fitting for the caliper arm

excuse the messy work bench - we have 4 projects going ('82 R650LS, this bike, '81 GS250, and an XL650)
'75 Honda CB360 - thread

Offline MiniatureNinja

  • Posts: 522
Re: 75 CB360 - bad omen "yatagarasu" build
« Reply #199 on: Apr 17, 2018, 23:47:50 »
OK got some crap done today I am pretty happy about the results so be nice :)


first thing was to fabricate a mount for the master cylinder under the tank. This was a must for me, mostly because I gave my stock master cylinder away to a user on here so they could finish their project, and also because I wanted nice clean bars, so no master up top for me!

step 1:


step 2:  (welded it) it bolts to the original coil mounting bolts - super excited about that, it means the thing can be easily removed and serviced


and MOUNTED: (ps, not gonna use that hardware, already got proper mounting hardware for it



the next thing I did was to make mounts for both the ignition coils as well as the steering damper




and I also finished drilling the rotor. I like the way it looks - almost as if all the holes get smaller as they go outward, but they don't!




lots more to do tomorrow - I want to tackle the shock mounting studs and maybe a few other things if I get motivated
'75 Honda CB360 - thread