collapse

www.dimecitycycles.com

www.cognitomoto.com

https://www.townmoto.com/collections/vanson-leathers

www.speedmotoco.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.lostapostlejewelry.com

www.sparckmoto.com

www.pistonsociety.com


Author Topic: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)  (Read 351331 times)

Offline crazypj

  • Posts: 13454
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #870 on: Sep 19, 2015, 16:25:35 »
3rd day we have no home phone. 'Shitehouse networks' are coming to take a look later  ::)
'Hello Fiend'
'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 Mcgoo

  • Posts: 123
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #871 on: Oct 01, 2015, 13:32:58 »
This is a great thread - Thanks
1972 CL450 (project) http://www.dotheton.com/forum/index.php?topic=64364.0
1981 CM400c (project) http://www.dotheton.com/forum/index.php?topic=60532.0
2013 Triumph Bonneville
1978 KZ1000 - Pending Project

Offline crazypj

  • Posts: 13454
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #872 on: Oct 04, 2015, 19:06:36 »
Because there has been so much confusion and downright wrong information on internet about how to measure a piston and cylinder, I made another 'Instructable' hoping to get two in the competition. Unfortunately I was too late to enter but I did it anyway.
Here's link
http://www.instructables.com/id/The-correct-way-to-measure-a-cylinder-bore-and-mea/
This is the correct way to measure piston and get piston to cylinder clearance
 There are way cheaper alternatives to find piston/cylinder clearance which are 'accurate' to about 0.0015" but really not accurate enough for any type of long life or 'performance'   ;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 ridesolo

  • DTT SUPPORTER
  • *
  • Posts: 1351
  • You only bear responsibility for your own actions
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #873 on: Dec 11, 2015, 21:21:38 »
Hey PJ, I don't remember reading if you've gotten any horsepower numbers on a 378.  That 22cc increase in displacement is a bit less than a 6.5% increase in displacement.  I was wondering if you have numbers on the increase in power.  Just curious.  (I've got a set of GS850 pistons on the way.   ;D  )
“Fight on and fly on to the last drop of blood and the last drop of fuel, to the last beat of the heart.”
— Baron Manfred von Richthofen

Please check out:  http://www.VetTix.org

This is cooking away out in the shop:
'75 Honda CL378: http://www.dotheton.com/forum/index.php?topic=56547.0

This is an on-going Non-Motorcycle saga:  http://www.dotheton.com/forum/index.php?topic=71319.0

This one is FINALLY done: (!)
'70 Rupp Roadster: http://www.dotheton.com/forum/index.php?topic=67459.0

Offline crazypj

  • Posts: 13454
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #874 on: Dec 12, 2015, 19:15:25 »
Nope, too much clutch slip when I had it on dyno.
 Numbers were all over the place with around 41bhp  max at rear wheel (the claimed 36bhp at crank is a bit of a stretch, Japanese must have used Shetland ponies to measure  ;D ;D )
There is a pic of print out somewhere here
Brendon's bike has been clocked at 115mph and 22BHP on one cylinder   :o (broke piston on the other side)
'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 Jlama

  • Posts: 3
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #875 on: Jan 13, 2016, 02:33:44 »
what size cooper gasket did you use for the 378 build

Offline crazypj

  • Posts: 13454
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #876 on: Jan 13, 2016, 18:38:57 »
69.5mm bore, gives slight clearance for piston top and reduction in compression isn't anything to worry about
Hey PJ, I don't remember reading if you've gotten any horsepower numbers on a 378.  That 22cc increase in displacement is a bit less than a 6.5% increase in displacement.  I was wondering if you have numbers on the increase in power.  Just curious.  (I've got a set of GS850 pistons on the way.   ;D  )
Oh, there should be a picture of dyno read  out somewhere in this thread .
I'm pretty sure 'official' Honda numbers were at crank and not rear wheel?
The power gain is actually around 8~10bhp compared to normal rear wheel output (around 28~30bhp) which is out of proportion to the capacity increase
Who says you can't get something for nothing  ;D (fuel consumption does increase a little if you beat on it though)
« Last Edit: Jan 13, 2016, 18:44:48 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 Jlama

  • Posts: 3
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #877 on: Jan 16, 2016, 07:08:56 »
Hi pj

was curious if you could give me measurements of copper  gaskets for thickness and bore size doing  gs850 pistons in my cb360  . i reached out to lani to make a copper gasket for me and thats what he asked for if you could be greatly appreciated.

Offline stroker crazy

  • DTT SUPPORTER
  • *
  • Posts: 4480
  • crazy as a fox
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #878 on: Jan 16, 2016, 08:28:55 »
This is the correct way to measure piston and get piston to cylinder clearance …

Top value information!

Crazy
“Ride like the Wind” W.H.

Offline crazypj

  • Posts: 13454
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #879 on: Jan 18, 2016, 00:29:51 »
Get gaskets about 69.50mm bore size.
You can use 69mm same as bore but I've found they need relieving slightly so piston top doesn't touch them when hot and they expand into bore
I may try 69.25 sometime (or maybe not as I have a few gaskets ready for use  ;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