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Author Topic: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)  (Read 357258 times)

Offline Worst cb650 ever

  • Posts: 1491
  • You can always get it running with time or money.
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #800 on: Feb 17, 2014, 10:25:08 »
No wonder the 360s love the synthetic oil so much.  I was worried my timing was advanced from the amount of heat the 360 was kicking out.

I didn't have any luck finding a Dynatech or other electronic ignition setup anyway.  One guy had a 10+ year old unit "new in the box" that he would "let" me have for $250  ::)  At least I picked up a turn signal / license plate bracket for the CBR900.
DTT Blue (cause Winter is Coming) CB360 Club.

1995 CBR900RR - a winter flip not worth a DTT writeup - Sold

1986 Yamaha SRX600 - mailed to me from California - build coming soon?

1983 VF750F

1976 CB360T

1993 CBR900RR - Sold

1979 CB650 - Sold

Offline crazypj

  • Posts: 13492
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #801 on: Feb 18, 2014, 12:01:40 »
Fitting 100w headlight to Katana, thought I'd be 'clever' and wire clutch safety switch through relay so headlight goes out when clutch pulled and button pressed
Well, that didn't work (without fitting a relay to power relay to work high/low  ::) )
Back hurting today, need to find my painkillers  :(
'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 crazypj

  • Posts: 13492
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #802 on: Feb 20, 2014, 03:53:34 »
Finally got Katana running, pissed petrol everywhere, pinhole in fuel line  :(
It's molded 90 degree, I made a union to fit tap and used the old fitting soldered in to make a 90.  ;D
Trying an experiment, (worthy of Ichiban  ;) )
Had some heat barrier but not enough to do all of tank bottom, so, aluminium foil tape for AC got used.
No idea if it will help keep fuel cooler or if it will fall off tank base when hot? (I did spend some time de-greasing base of tank)


Fitting soldered in


Finished piece


It kept me busy and amused for the day  ;D


« Last Edit: Feb 20, 2014, 03:55:14 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 MGD

  • Posts: 372
    • 1989 Honda Hawk Build
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #803 on: Feb 20, 2014, 15:35:26 »
The glue on that true "Duct" tape is unbelievable.

It should hold up to the temps just fine.

I hope you never want to get that stuff off the tank.




Offline crazypj

  • Posts: 13492
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #804 on: Feb 21, 2014, 14:45:45 »
That's good to know, didn't seem so great for duct repair, probably didn't get all the dust off.
I cleaned and de-greased tank so hopefully it will 'never' move  8)
Bike seems to be running fine considering it hasn't been ridden for over a year, guess starting it up every couple of weeks helped prevent carbs s gumming up.
Damn elbow is hurting where surgery was performed, worse than hand (that's only tingling. same as 3+ yrs ago)
Only did 10 miles to bike 'club' and 10 miles home, back not too bad last night but not so good today. May be a long time before I can ride any decent distance (100+ mile club run, etc)  :(
'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 timberwolffxdl

  • Posts: 303
Re: Yet another CB360 ( or two?)
« Reply #805 on: Mar 05, 2014, 14:38:10 »

3. 2mm oversize pistons. Cylinder has been bored but not honed to size

what piston to wall clearance did you bore to and what clearance to finish to after the hone?

Offline crazypj

  • Posts: 13492
  • Split personality, I fake being smart
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #806 on: Mar 06, 2014, 01:15:45 »
Bore around 0.002" undersize and hone to 0.0015"~0.0017" bigger than piston  (about 0.002"~0.003" honing)
 There are pics in here somewhere
'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 timberwolffxdl

  • Posts: 303
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #807 on: Mar 06, 2014, 09:35:19 »
I read through the thread a few weeks ago, but honestly, 54 pages long...it's a bit of work to find specific info to just this part of the build.  I have been running through google, and EVERY thing I come across about the GS850 pistons has a response where someone says you've done and posted details.  But I can never find a good, clear writeup on just that mod.  This thread is the best I've been able to find.

Have you done any sort of tech article on just the big bore mod?  I'd be interested in seeing something with the details of how you did it.  Piston selection, rings, gaskets, what got machined (heads, cylinder base.head mating surface) any head mods, etc. 

Heck, I'd even help as yours is probably together and mine is ready to get started to step by step before and after pics can still be taken.


Offline Sonreir

  • Moderator
  • DTT SUPPORTER
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  • Posts: 11372
  • Oregon
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #808 on: Mar 06, 2014, 11:18:53 »
The GS850 pistons are pretty much a straight swap.  They have a slightly higher deck height than the CB360 pistons, so make sure you don't take too much, if any, metal out of the stack.  Other than that, you're just boring the cylinders to accept them.
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

Offline timberwolffxdl

  • Posts: 303
Re: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)
« Reply #809 on: Mar 06, 2014, 11:24:15 »
The GS850 pistons are pretty much a straight swap.  They have a slightly higher deck height than the CB360 pistons, so make sure you don't take too much, if any, metal out of the stack.  Other than that, you're just boring the cylinders to accept them.
seems I've read about shaving the head .025"?  also, will pretty much any vanilla gasket set work?  I may be remembering wrong, but I thought I saw something where PJ said to use other gaskets either for the head or base.  I've also seen some folks talk about doubling up a gasket to maintain p-to-v clearance.