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Author Topic: 540cc Honda 360 Engine  (Read 46980 times)

Offline cyclhed

  • Posts: 368
    • Irish Cycles
540cc Honda 360 Engine
« on: Jul 20, 2012, 23:44:21 »
This is a project monster motor that my father is building. Here are the details:
360 case bored to accept CB500 Twin crank 64.8mm stroke, the 360 case was bored to accept the center main bearings, also
clearance for rods and flywheels to swing.
Cylinder block sleeved with KZ1100 sleeves with 72.5mm bore
KZ1100 pistons 72.5mm
3/8" cylinder spacer to get to 0 deck
KZ1000 30T cam sprocket to match crank
Stock head with 2mm oversize titanium intake valves
Intake ports raised 1/2" by welding
Exhaust seats bored 1mm but with stock valves

More to come as it progresses.


« Last Edit: Jul 24, 2012, 01:51:10 by cyclhed »
540cc CB360 Honda engine cafe' Project: http://www.dotheton.com/forum/index.php?topic=39496

CR200 Chopper Project: http://www.dotheton.com/forum/index.php?topic=28969

CL100/SL125 Cafe' Project: http://www.dotheton.com/forum/index.php?topic=36548

SL-350 Super Moto-Sport Project: http://www.dotheton.com/forum/index.php?topic=27751

Twowheelin' since '62!

Offline cyclhed

  • Posts: 368
    • Irish Cycles
Re: 540cc Honda 360 Engine
« Reply #1 on: Jul 20, 2012, 23:46:39 »
additional picture: cam sprocket
540cc CB360 Honda engine cafe' Project: http://www.dotheton.com/forum/index.php?topic=39496

CR200 Chopper Project: http://www.dotheton.com/forum/index.php?topic=28969

CL100/SL125 Cafe' Project: http://www.dotheton.com/forum/index.php?topic=36548

SL-350 Super Moto-Sport Project: http://www.dotheton.com/forum/index.php?topic=27751

Twowheelin' since '62!

Offline two-smoker

  • Posts: 997
  • I reject your reality, and substitute my own!
Re: 540cc Honda 360 Engine
« Reply #2 on: Jul 21, 2012, 08:46:45 »
Jesus Christ on a cracker!
"I suppose I'd say.... BOLLOCKS! But that's pretty much a reflex for me...."
1973 Yamaha TX500- project Shinjimei

2010 Hyosung GT250R

Offline shamus

  • Posts: 455
  • LDMMC
Re: 540cc Honda 360 Engine
« Reply #3 on: Jul 21, 2012, 09:49:55 »
What he^ said.
My xs360 build:

http://www.dotheton.com/forum/index.php?topic=37624.msg408051#msg408051

1976 Yamaha XS360
1977 Yamaha TT500

Offline Xravnos

  • Posts: 12
Re: 540cc Honda 360 Engine
« Reply #4 on: Jul 21, 2012, 09:59:54 »
OH damn, well just glued to this post, will be following...

Offline legendary_rider

  • Posts: 573
  • Jump in with both feet.
Re: 540cc Honda 360 Engine
« Reply #5 on: Jul 21, 2012, 10:38:46 »
I thought I was nuts doing the mods on my motor. You make me feel better. Misery loves company though. I'd like to hear of issues that made him want to pull his hair out too. lol. Amazing job though bud.
« Last Edit: Jul 22, 2012, 10:02:13 by legendary_rider »
http://www.dotheton.com/forum/index.php?topic=39352.msg429000#msg429000
1970 Cb350 x 2
1971 cb350 x 2
1972 cb350 x 2
1973 cb 350
1974 cb 360 x 2
1975 cb360
1977 CJ360T

Offline teazer

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 8201
Re: 540cc Honda 360 Engine
« Reply #6 on: Jul 22, 2012, 01:56:30 »
Nice little project there.  I would have used 1mm O/S intakes and 1mm o/s exhaust valves and decked more off the head, but that's just me.  I would also have left the intake ports and raised the exhaust ports to improve the exhaust flow.

But it ain't my project, so I don't get a vote.  Will be interesting to see how it turns out.

Offline frogman

  • DTT SUPPORTER
  • *
  • Posts: 1962
  • '74 CB360, '71 CB450, '75 CB550SS
Re: 540cc Honda 360 Engine
« Reply #7 on: Jul 22, 2012, 02:02:03 »
Just when I thought crazy pj was nutty, then this comes along, DO PLEASE document as much as you can. We will all watch and comment.

Thoughts might be to use 450 pistons if they work and/or check out the aftermarket options for cb500t pistons as they do exist and are better all around then stock. Might cost more but will work better.
« Last Edit: Jul 22, 2012, 02:04:53 by frogman »

smvirili

  • Guest
Re: 540cc Honda 360 Engine
« Reply #8 on: Jul 22, 2012, 10:55:24 »
what the fuck is this. :o
honestly don't think i can wait to hear it. get your father to work double time.
shiiiieeeeeet

Offline Sonreir

  • Moderator
  • DTT SUPPORTER
  • *
  • Posts: 10307
  • Oregon
Re: 540cc Honda 360 Engine
« Reply #9 on: Jul 22, 2012, 12:22:50 »
I second the larger exhaust valve/port idea.  The intake flow on the 360 head (for a 356cc motor, anyway) is already too big.  The exhaust ports are a problem even at that displacement though.  If your cam decision isn't yet finalized and you have no plans to enlarge the exhaust ports, you're going to want to see some high lift numbers.
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
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys