CB360 (378cc) Green Meanie (Weenie) 2.0 -

Re: CB360 (378cc) Green Meanie 2.0 -

Also ensure butterflies fit center inside bodies. So one or both wont drag and hang open a bit.

I used a thin smear of hondabond on the insulator gaskets to seal them so they dont draw. Also make sure insulators arent warped and fit gasket/head nice and flat.
 
Re: CB360 (378cc) Green Meanie 2.0 -

When I take the carbs back off I'll flatten the tops and caps on a surface plate...they look good but I'll verify it. Yes, shaft plugs are in place. My boots are in good shape, I'll check for leaks though...
 
Re: CB360 (378cc) Green Meanie 2.0 -

Sonreir said:
Couldn't get it to rev. Bad battery.
For what it's worth. My stock carbs worked fairly well after bumping them up a bit on the secondary mains. Because of my cam, I had to advance the starting timing quite a bit, but the problems I had that led me to that decision are quite a bit different than yours.
Click to expand...

I can modify the stock carbs to work pretty damn good, only problem is, I need them here to work on
I think I already did your though?
Several people here have my modified carbs and some others are finding a 'mostly stock' CB360 is way faster than it should be 8)
Just upping secondary mains doesn't work very well as it creates a massive rich mixture around 4~5,000 rpm, raising needles make it even worse, they actually need to be dropped to help transition between primary and secondary main jets (but as they are 'fixed' type that isn't possible)
 
Re: CB360 (378cc) Green Meanie 2.0 -

crazypj said:
I can modify the stock carbs to work pretty damn good, only problem is, I need them here to work on
I think I already did your though?
Several people here have my modified carbs and some others are finding a 'mostly stock' CB360 is way faster than it should be 8)
Just upping secondary mains doesn't work very well as it creates a massive rich mixture around 4~5,000 rpm, raising needles make it even worse, they actually need to be dropped to help transition between primary and secondary main jets (but as they are 'fixed' type that isn't possible)
Click to expand...

This is a different set... you have not modified these. (Should be able to at least get a decent Idle right? i don't think you do anything to the pilot circuit do you?)

Here's what I'm finding.... after I did another session with them this afternoon.

I have no vacuum leaks. boots are tight against the head, I added a smear of Yamabond to be certain there was no leak there... diaphragm caps are flat and seal well, factory shaft plugs are in place,checked for leaks by spraying some carb cleaner around while running... zero changes. I double checked my float height today while blowing into the fuel hose and setting the float to when it just closes the air flow. I loosened my butterfly valves and made sure they were centered and able to close completely and bench sync'd them again, oiled my linkage. My throttle cable goes slack at when the throttle is released. My sync gauges are supposed to get back to me tomorrow but tomorrow is the wife's birthday and Thursday is Triumph night. I't'll be Sat before I can spend any real time with the CB.) K&N Filters, and extended straight pipes BTW. (I"m going to shorten the pipes a bit and install some 12" shorties... just too loud at 5k rpm and higher for my neighborhood.) After I get the carbs sync'd with gauges I'm going to review my ignition/timing/valve lash stuff again. Timing light says I'm timed correctly though but won't hurt to check...

Idle wants to run pretty high... but it'll settle down to 1200 RPM where I have the idle screw set... it'll run there for a minute or two and then die. (stock pilot jets). I have the air screws out 1 turn right now. It will accelerate off idle without gasping and there's no too rich black smoke. After it dies, it'll start right back up but will race up and slowly return to 1200 rpm and run for a bit and die.
 
Re: CB360 (378cc) Green Meanie 2.0 -

Quite possibly pilot circuit. Bike should idle OK and run up to about 4K without problems.
Have you taken all the brass out of carbs for cleaning?
You don't have aftermarket pilot jets do you?
 
Re: CB360 (378cc) Green Meanie 2.0 -

crazypj said:
Quite possibly pilot circuit. Bike should idle OK and run up to about 4K without problems.
Have you taken all the brass out of carbs for cleaning?
You don't have aftermarket pilot jets do you?
Click to expand...

Yes.. all the brass has been replaced or cleaned. and I do have after market pilots in there currently... ( I still have the stockers )

The bike will run over 4k without a stutter... (no load, can't ride it... brakes and linkages are getting redone too...)
 
Re: CB360 (378cc) Green Meanie 2.0 -

Put the stock pilot jets back in after a real good cleaning.
I've yet to see any aftermarket pilots with the correct size holes which is why I always 'blueprint' them when doing carb mods ( I bought some 0.30mm and 0.35mm dia drill bits, so small they get lost before they get broken ;D )
I haven't got any 0.38mm as I could only find them in bulk at about $110 for 20 ( before anyone points it out, number and letter drills DO NOT MATCH even though they say they should)
Even the tiny (actually around 0.012"~0.014" fur yur 'murricuns' ;D ) drill bits are a teeny tiny bit undersized so drilling operation will give correct size. 0.35mm drill is actually 0.348mm (yep, two thousandths of a millimetre)
You should get a 0.35mm coper wire through them to make sure they are not restricted with an oxide layer on the inside, get a strand or two from old telephone cable or USB, etc
 
Re: CB360 (378cc) Green Meanie 2.0 -

Sounds like you got em tip top. I read you got the A/F adj at 1 turn. Thats pretty lean, open the A/F adj up to two turns out. Sucks cuase you cant dial them in to proper setup till shes at full operating temp.
 
Re: CB360 (378cc) Green Meanie 2.0 -

Matt may have already wrote. As she warms up the fuel will be better atomized and it will cause it to burn richer. But, yes open up the A/F mix. atleast to 2 turns to start with, just to see if you can get her idling longer.
 
Re: CB360 (378cc) Green Meanie 2.0 -

If need be I "MAY" be able to run over there. This weekend, maybe early Saturday morning. I got along list of crap to do...but. It would be way more fun to take a little road trip.
 
Re: CB360 (378cc) Green Meanie 2.0 -

trek97 said:
If need be I "MAY" be able to run over there. This weekend, maybe early Saturday morning. I got along list of crap to do...but. It would be way more fun to take a little road trip.
Click to expand...

Let me get the Pilots swapped back out... and knock the air screws out to 2 turns and see what happens. It would be nice to get a CB head to verify my timing/fuel stuff is as on point as I think it is.

I have a pair of Mikuni boots coming too for better fitment of those VMs too but for the moment. (I'm not ready to give up on those yet. But I'm going to continue with the Stock carbs for the moment.)
 
Re: CB360 (378cc) Green Meanie 2.0 -

Im sorry bud, I completely mis spoke. The mix WILL richen as the bike warms. But, even still open the A/F mix up. Ive never had mine set at 1 turn. And Ive messed w them alot.
I will edit my earlier confused post.
 
Re: CB360 (378cc) Green Meanie 2.0 -

trek97 said:
Im sorry bud, I completely mis spoke. The mix WILL richen as the bike warms. But, even still open the A/F mix up. Ive never had mine set at 1 turn. And Ive messed w them alot.
I will edit my earlier confused post.
Click to expand...

Well today at lunch time (working from home today..) I'm going to pop the rocker box back off and review my timing network... Cam chain sprocket > Cam chain guide/tensioner > Tappets clearance > point gap / timing.. Shouldn't take more than an hour right? :)

Process of elimination... eliminate bone headed moves.

(This will allow me to verify that I'm getting oil to the head too.)
 
Re: CB360 (378cc) Green Meanie 2.0 -

Most importantly... I am NOT getting oil to the top end. There's not been a lot of running on the assembly lube... I hope I don't have to seek out more castings.

Gonna have to go into bottom of the engine it would appear, at least clean out the filter/screen/check oil pump... shit...
 
Re: CB360 (378cc) Green Meanie 2.0 -

Have you done the oil transfer piece mod in clutch cover?
Not getting oil to top end is seious problem, check the idler gear between crank and oil pump drive gear isn't damaged, it's pretty easy to break a tooth off or bend gear if your not thinking straight when assembling (being tired, too late at night, few beers, etc ;) )
 
CB360 (378cc) Green Meanie 2.0 -

Good thing I have another gear on hand. Need to modify an old socket to remove the oil filter though... Dammit..

At least I know why my top end is dry... Fuckin' thing...




Sent from my iPhone using Tapatalk
 
Re: CB360 (378cc) Green Meanie 2.0 -

Drill your clutch basket and put some CB550 springs in there while you have it open.
 
Re: CB360 (378cc) Green Meanie 2.0 -

deviant said:
Drill your clutch basket and put some CB550 springs in there while you have it open.
Click to expand...

I have upgraded EBC clutch springs already. Not 100% sure I wanna pull the clutch stack out to drill it... but I'm not opposed to it.


BUT... how the hell do you get the cap off the oil filter? I removed the snap ring but can't get the cap off. Came right off of my donor bike if I recall correctly.
 
Re: CB360 (378cc) Green Meanie 2.0 -

They can get jammed up. It's been a while since I worked on a 360, so I can't remember if you can get a slide hammer to work on there. That's how I did my XL250 this last time. Doesn't take much. Just a little encouragement.
 
Re: CB360 (378cc) Green Meanie 2.0 -

deviant said:
They can get jammed up. It's been a while since I worked on a 360, so I can't remember if you can get a slide hammer to work on there. That's how I did my XL250 this last time. Doesn't take much. Just a little encouragement.
Click to expand...

Got the cap off... you just run a screw in to press it out.

Now to make a tool to get out the nut.
 
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