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Author Topic: CJ360 Build (my first)  (Read 6249 times)

Offline irk miller

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Re: CJ360 Build (my first)
« Reply #20 on: Jan 17, 2018, 10:40:45 »
Acetone test?
I would.  I do every time.   I use alcohol though, since it's not so noxious.

Offline crazypj

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Re: CJ360 Build (my first)
« Reply #21 on: Jan 17, 2018, 11:29:00 »
Nowadays I just spray some WD40 down ports and look for 'creep' at valve heads
'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 ZenMoto

  • Posts: 43
Re: CJ360 Build (my first)
« Reply #22 on: Jan 17, 2018, 15:34:22 »
Thanks again guys; I'm learning as I go here. ...I will check the valves with alcohol and see if there is any leakage. Probably a stupid question, but it is necessary to replace the rings when putting this thing back together?

Offline MiniatureNinja

  • Posts: 480
Re: CJ360 Build (my first)
« Reply #23 on: Jan 17, 2018, 15:37:12 »
Thanks again guys; I'm learning as I go here. ...I will check the valves with alcohol and see if there is any leakage. Probably a stupid question, but it is necessary to replace the rings when putting this thing back together?

if you're honing the cylinder I would replace them.
'75 Honda CB360 - thread

Offline crazypj

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Re: CJ360 Build (my first)
« Reply #24 on: Jan 17, 2018, 18:59:51 »
Just remove top ring from piston and check end gap. If it's within a few thou of max change them, if towards 'tight' side don't bother.
Honda never gave a 'free end gap' but should be around 9~10mm it's an indication of how much tension is on rings when in cylinder
Do the check after de-glazing bores
'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 ZenMoto

  • Posts: 43
Re: CJ360 Build (my first)
« Reply #25 on: Jan 18, 2018, 06:13:14 »
Well, good news on the valves, I tested them with alcohol and had absolutely no leakage at all. ...OTOH, being a clumsy oaf I broke one of my rings trying to remove them. Man, I was barely spreading it enough to get it out of the groove when it snapped. If there's a trick to doing it, I don't know it!  lol

What do you guys recommend for removing all the carbon build up on the piston, valves, and combustion chamber?

Offline trek97

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Re: CJ360 Build (my first)
« Reply #26 on: Jan 18, 2018, 06:50:48 »
I soaked pistons in Carb-medic for a couple days, and used a plastic brush to clean ring grooves.
You could flip head (valves still installed and fill them w Carb-medic also.
Then pull the valves and wire wheel them clean.


Offline ZenMoto

  • Posts: 43
Re: CJ360 Build (my first)
« Reply #27 on: Jan 18, 2018, 06:58:18 »
Thanks Trek ...and don't you ever sleep?  lol

Offline trek97

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Re: CJ360 Build (my first)
« Reply #28 on: Jan 18, 2018, 08:34:23 »
Thanks Trek ...and don't you ever sleep?  lol

Haha yes,  In bed by 9 and up early...Its what old people do.   :P

Offline advCo

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Re: CJ360 Build (my first)
« Reply #29 on: Jan 18, 2018, 08:43:43 »
Why do you think the tensioner needs replaced? If your engine # has two punch marks above and below the dash in the number, the factory fix has already been done.


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74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0 - Sold
82 GS550L - Tracker-ish - http://www.dotheton.com/forum/index.php?topic=67229.0 - Sold
74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0 - Sold
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
73 Suzuki RV125 -http://www.dotheton.com/forum/index.php?topic=73875.0
'97 BMW F650st - http://www.dotheton.com/forum/index.php?topic=75732.0