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Author Topic: 1974 CB360 - first bike/build  (Read 11448 times)

Offline huck_finn

  • Posts: 167
    • 1974 CB360
Re: 1974 CB360 - first bike/build
« Reply #30 on: Jan 15, 2018, 12:20:30 »
lookin good, any plans for changing up the seat ? those lower clipons will reall want a lower seating position I think

I plan on building a completely new seat - carving up some green blocks of foam and glassing it. I did cut a few bits off the frame (seat hinge, seat lock, and side cover mounts) to help the new seat sit flush.

Offline huck_finn

  • Posts: 167
    • 1974 CB360
Re: 1974 CB360 - first bike/build
« Reply #31 on: Jan 15, 2018, 12:57:19 »
And because I like to do things the hard way...I am going to try and build a new air intake to clean up my triangle. I am not trying to go for a naked triangle look, but I do want to add some negative space in there. I found this book searching around on Google to help me get my head around the concepts involved with air flow and fuel intake.

And since I have access to a full lab of 3D printers, I should be able to develop something that comes pretty close to the stock airflow. I have been look at photos from Peter Cabrel's 360 build and trying to figure out if the intake he built would match the stock setup.


Offline crazypj

  • Posts: 13158
  • Split personality, I fake being smart
Re: 1974 CB360 - first bike/build
« Reply #32 on: Jan 15, 2018, 15:43:39 »
I don't remember why I didn't buy that book, looked at first edition years ago though.
Probably easier to just draw something out then take a look at lengths and diameters, stock works out somewhere close to 25" IIRC? When you 'go short with K&N filters carbs need some major working over. Two stoke 'pulse tuning' isn't the same as 4stroke though, you will go nuts trying to use any of the formula's in that book. (there are simple reasons but I'll let you figure it out  ;D )
'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 huck_finn

  • Posts: 167
    • 1974 CB360
Re: 1974 CB360 - first bike/build
« Reply #33 on: Jan 15, 2018, 16:32:52 »
More than likely I would build out a box and use some UNI foam as the filter. I am not all that interested in screwing around with my carbs right now. I just plan on replacing the diaphragms with some OEMs, get a couple of new float needles (springs are shot on mine), and making sure that the diaphragm spring is within factory spec.

Offline huck_finn

  • Posts: 167
    • 1974 CB360
Re: 1974 CB360 - first bike/build
« Reply #34 on: Jan 18, 2018, 10:31:20 »
I haven't been able to find just the diaphragms for my carbs, I can only find the entire piston+diaphragm+spring. BikeBandit has them for around $80...but I am seeing that DCC has their Mikuni 28's for only $87.

Is it worth it to keep fooling with my stock carbs or just go ahead and look at getting a set of Mikuni carbs? My carbs are clean, but they do have some corrosion around the slow & main jets.


Offline huck_finn

  • Posts: 167
    • 1974 CB360
Re: 1974 CB360 - first bike/build
« Reply #36 on: Jan 18, 2018, 12:11:47 »
I am trying to find Honda OEM diaphragms so I don't have to drill anything out on my carbs (per CrazyPJ's advice).

Offline irk miller

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  • You've been mostly-dead all day.
Re: 1974 CB360 - first bike/build
« Reply #37 on: Jan 18, 2018, 12:28:58 »
Those replace OEM.  There's no such thing as OEM anymore.

Offline WhyNot

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Re: 1974 CB360 - first bike/build
« Reply #38 on: Jan 18, 2018, 16:43:08 »
Those replace OEM.  There's no such thing as OEM anymore.

Of which I'm finding that fact out rather quickly.

And the prices, they be on the rise for this vintage stuff.

Nice build so far, just jumped in to watch.
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 SL350K2 Frame for above engine
1972 Honda CB100K2 needs kicker shaft
1990 Mitsubishi MM needs engine rebuild
1984 Dodge D50 Beater DD since 1997

Offline crazypj

  • Posts: 13158
  • Split personality, I fake being smart
Re: 1974 CB360 - first bike/build
« Reply #39 on: Jan 18, 2018, 18:06:53 »
Diaphragms have never been available as a separate part from Honda but new ones are available as it's same size as something they still make.
It is one of the reasons I like Honda, until a few years ago they always stated they would keep a Honda on the road by supplying parts for any bike they made (consumer production models of course, not race of prototypes)
You can find stories where trainee's at Honda handmade parts foe 'obsolete' bikes
I am a little surprised they didn't start making cam chain tensioner's but as 'after-market now makes them there isn't the need
'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