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Author Topic: 1974 CB360 Fallin' Ditch Hell Ride  (Read 50504 times)

Offline crazypj

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #460 on: Jan 14, 2018, 01:40:31 »
It really isn't needed plus many of the tiny pumps are not rated above 150f~175f and you WILL be feeding it oil around 200f~250f (it isn't really cost effective for high temp pump or it needs too many amps to get decent flow)
 Use good oil, semi or full synthetic and do oil mods I've listed multiple times.
Use either 10W/40 or 5W/40 full synthetic JASO Spec oil
DO NOT USE 20W/50 - EVER cam bearings can seize in as little as 50 miles at highway speeds (70mph+)
Gun drill cam, open oil feed 'jets' modify oil transfer piece, good for sustained 11,000+rpm - 115mph
« Last Edit: Jan 14, 2018, 01:45:32 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 MiniatureNinja

  • Posts: 479
Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #461 on: Jan 14, 2018, 02:22:48 »
It really isn't needed plus many of the tiny pumps are not rated above 150f~175f and you WILL be feeding it oil around 200f~250f (it isn't really cost effective for high temp pump or it needs too many amps to get decent flow)
 Use good oil, semi or full synthetic and do oil mods I've listed multiple times.
Use either 10W/40 or 5W/40 full synthetic JASO Spec oil
DO NOT USE 20W/50 - EVER cam bearings can seize in as little as 50 miles at highway speeds (70mph+)
Gun drill cam, open oil feed 'jets' modify oil transfer piece, good for sustained 11,000+rpm - 115mph

I've stalked your username across multiple sites for years while building my 360 - I did all the things you talked about aside from gun drilling the cam (don't have the equipment for that) last year the bike caught fire (while I was riding, lithium battery exploded under my ass) and it was all I could do to fix her and keep riding through the summer. Bike is now torn down and I am doing the 378 with gs850 pistons, and have since been stalking everyone else who so much as mentions such a mod, thus, I am now here
'75 Honda CB360 - thread

Online irk miller

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #462 on: Mar 24, 2018, 20:32:34 »
Bought a stock set of carbs modified by PJ from a gracious fellow member.  We'll see how it does.  I never really felt like the Mikunis were right. 

PJ, I seem to remember you talking about your modified stock carbs on a (yours?) 378 in another thread.  I hope I'm right about that.

Offline crazypj

  • Posts: 13198
  • Split personality, I fake being smart
Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #463 on: Mar 26, 2018, 10:44:09 »
In my opinion modified stock are way superior for road use (and not just because I modify them) I've tried Mikuni's several times but just can't get them to work as well on an engine that needs to pull from idle to 11,000 rpm. Using 26mm works but acceleration from 7k is slower than with 30's,(but then you lose bottom end)  32's are just too big until you have a 13,000rpm motor that doesn't go below 6K. The main advantage of the CV is it doesn't care what you think you want and gives you what you 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

Offline cxman

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #464 on: Mar 26, 2018, 12:56:58 »
i would put a set of baby 28s up against any 360 with cvs

either on the road or on the dyno better horsepower and torque if tuned properly
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline crazypj

  • Posts: 13198
  • Split personality, I fake being smart
Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #465 on: Mar 26, 2018, 22:18:15 »
Not across the entire range plus you have to be a lot more careful opening throttle or you will get flat spots when air isn't moving fast enough to pick up fuel.
It's an incredibly well known phenomena.(since at least 1950's)
Mikuni's will work lot better on four stroke with much smaller cut-away, 2.5 doesn't give enough air velocity when throttle is opened quick from idle so crazy rich 'primary choke' is used. Two strokes can mix fuel and air in crankcase but four-stroke doesn't have volume or time to do the same so you use a smaller carb bore (26mm works better than 28 in most cases) The Kei-Hin 'oval bore' carbs work better as they keep velocity higher, inverted pear shape would probably be even better but need more work on needle and needle jet, air passages, etc.
Because of the issue I've just had with JBM diaphragms, I'll probably be returning to Mikuni VM tinkering after I get another 4 sets of CV carbs done.
Even then I will still recommend CV over VM on 360 or 378.
 If I can't get them to run at least as well as a stock 360 I'll just stick with stock CV's and put Mikuni's back on the shelf for another 5~10 yrs.  Basically, the VM is too crude even if it is simpler to have only pilot and main jets. 3 jet Kei-Hin can control mixture more accurately even if it is a PITA without stock airbox
32mm VM,s worked great on my XS650/800 after I made new emulsion tubes and bought about $100.00 wort of different main and pilot jets, but, the stock CV carbs on XS 650 are weird and horrible so it was worth the hassle
 As you pointed out several months ago, CX has hig compression and heavy flywheels, you can make them  'spit back' real easy but also, when they are wound up the weight keeps them turning over.
« Last Edit: Mar 26, 2018, 22:21:01 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

Online irk miller

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1974 CB360 Fallin' Ditch Hell Ride
« Reply #466 on: Jun 23, 2018, 01:22:02 »
Messing with timing, I thought Id show off my favorite tool for static timing. Its a voltage tester that comes with a threaded cap. The cap shares the same thread pattern as the points cover screw. Makes for an easy time...




Sent from my iPhone using DO THE TON

Offline trek97

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #467 on: Jun 23, 2018, 07:16:09 »
Well isn't that just neater than shit. 
Will it plug into a Fluke? Where did you find it?

I found the 4 headers make a perfect meter bench when checking static time.


Online irk miller

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #468 on: Jun 23, 2018, 10:11:22 »
Where did you find it?


I think I got it from a BMW parts house, or eBay.  This one is the Hahn + Kolb version. 

Offline trek97

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #469 on: Jun 23, 2018, 10:37:06 »
I think I got it from a BMW parts house, or eBay.  This one is the Hahn + Kolb version. 

Betting I know a really good dude who could turn a few of those out to fit Fluke meter leads. 
You know, to pass out to his buddies.   ;)