CB360T Build/Rebuild

Put the motor back in today and then reassembled all that other stuff.

Started up on the second kick and actually sounded like a real engine, revved it to 6 or 7 grand but didn't idle (mostly because I haven't set the idle screw at all). Guess I'll be tuning tomorrow. ;D
 
So I've now torn the engine apart three times in the last two weeks. I've got a massive oil leak between the block and the cylinder head, and it just keeps getting worse every time I try to fix it.

Realized I didn't have the o-rings installed on the bottom of the cylinder sleeves and did that today. The thing is like the Exxon-Valdez, and I'm running out of ideas. Going to order an entirely new gasket set and hope that solves the problem, otherwise I'm out of ideas.
 
The new (expensive) gasket kit is here, and the bike is again torn apart.

So I'll take the engine apart again, make sure to carefully scrape off all the old gasket material, put new o-rings on the cylinder sleeves and torque the head down properly.

Is there anything else anybody recommends to avoid oil leaks on these motors? Gasket sealer, etc? Now's the time to chime in before I loose my mind (more so).
 
Hey, cool lookin' ride! 8)

Sorry to hear you're struggling with that oil leak. These "old bike" projects will test you sometimes! :eek:

I'd recommend waiting to talk to someone before you assemble it this time. There may be a simple step to solve your problem. Try to PM Druro or one of the others who've chipped in with comments or advise from 360 projects of their own.

Don't rush it! You'll save yourself frustration and have a reliable ride in the end! ;)
 
cholland_ said:
The new (expensive) gasket kit is here, and the bike is again torn apart.

So I'll take the engine apart again, make sure to carefully scrape off all the old gasket material, put new o-rings on the cylinder sleeves and torque the head down properly.

Is there anything else anybody recommends to avoid oil leaks on these motors? Gasket sealer, etc? Now's the time to chime in before I loose my mind (more so).
Click to expand...

These old cases can get tweaked of use and abuse. You may need to have the case halves machined. It's not a bad idea anyway even if they aren't 30+ years old. If they are not too bad off, you can use RTV sealant. But if you are having this much trouble, I strongly recommend taking them to a machine shop. At least measure them to see if they are with in tolerance to eliminate that as the problem.
 
First off I have to say nice bike....I hope to get mine looking like that when I am done. I agree with tweakedlogic about machining the parts so everything sits nice and flush. When my engine was rebuilt everything was machined, and so far no oil leaks. One good idea is to place motoseal ( http://www.canadiantire.ca/AST/browse/4/Auto/AutoRepairAccessories/GasketMakers/PRD~0382523P/Motoseal%2B1%2BUltimate%2BGasket%2BMaker%252C%2BGrey.jsp ) around each side of the gasket to help seal it, I have mostly used the red one but I have the grey on there now. I use this stuff when I remove the side cover to clean my oil filter and so far has worked well.
 
Thanks for everybody's replies. I haven't worked on it at all this week (thought I could use a break).

I'm hoping machining won't be necessary. I never took the block apart originally, just put new rings on the pistons and cleaned everything up, and it wasn't leaking prior. Although when I will get the top-end off again I'll check deck level.

I bought a new gasket set, and have a contact at Oshawa Cycle Salvage who is going to give me some tips. Hopefully I get some results when I decide to dive back into it!
 
Small update for my loyal fans... ::)

The engine is apart again, the deck on the block seems okay, but there was some old gasket material stuck to the bottom of the cylinders, right about where it was leaking. It at a machine shop being ultrasonically cleaned now. I'll get it back on Tuesday, and rebuild for the last damn time!
 
Engine is back together, no more massive oil leaks and is running pretty well. I took it around the block today, and nothing fell apart, which is a good thing.

Problems now include...
-one cylinder burning oil pretty badly, I think a valve seal is bad (but I also think I'm going to wait for the winter to take the head off again, and just blow blue smoke in everybody's face until then)
-the clutch cable adjustment is very twitchy, and I can't get it to go all the way off. I think I may be missing the little ball that goes against the pushrod
-the kickstarter won't ratchet back to the up-position when the engine is running

No pictures... because I forgot to take any. ::)
 
Another update!
IMGP8402.jpg


clutch cable is adjusted properly now. I wasn't missing the ball, it's just a very sensitive adjustment. I also pulled off the right-hand engine cover to look at the kick start mechanism. The spring was off it's perch, because a little piece of it broke off (please ignore that the wrong thing is in focus).
IMGP8414.jpg

There's still enough of a ridge to hold the spring in place, but it jumps off whenever you actually kick the engine. So now my options are seeing if JB weld will hold it ::), fixing the starter clutch or dealing with a kickstarter that hangs down when the engine is running. No matter what, it's a bitch.

Here's one more picture of the paint on the tank, after polishing. If it doesn't run well, at least it looks pretty!
IMGP8405.jpg
 
Hey cholland-

Great build and I think the color of the tank is pretty cool.

I have one question about your tires> What size of inner tube did you put inside the spitfires?

Thanks

Dave
 
cafe350 said:
What size of inner tube did you put inside the spitfires?
Click to expand...

To be honest, I have no clue. Whatever ones the tire shop put on there... Sorry I can't be more help.

Anyways, not a lot to report...

IMGP8667.jpg

All this junk has been transported to a new case in an attempt to regain my kickstarter.

Somewhat unrelated... not the bikes engine, but pretty freakin' ridiculous:
IMGP8773.jpg
 
Done. For now.

IMGP8904.jpg


I've still got the 2-1 exhaust to install, and some wiring to clean up... but I think I'm going to leave it as is and enjoy it for a while (assuming the weather goes back above freezing).
 
get your throttle working? its maladjusted tension in one of the lines, there should be an adjuster along the line somewhere, you can also do this to an extent with the bend part that goes in to your throttle.
 
I'm hoping to have this thing in the 'finished' category very soon.

The bike is, as of last month, insured, plated and licensed. Although not running the best. I believe I actually rode it to get safetied on one cylinder. It got a set of XS650 coils and the carbs re-checked, floats set and reassembled and is running on both cylinders, pretty smoothly now.

Issues now:
-it's idling at 4000rpm. Hopefully just the throttle cable's too tight, or a maybe a vacuum leak around the carb boot? I didn't get a chance to investigate yet.
-small oil leak around the starter hole. Hopefully just the o-ring that's in there.

This is the only semi-recent photo I've got. I've been slackin' like crazy.
IMG00081.jpg
 
Good job!! Lovin' this! Keep at it! 8)
 
noticed the 914 ugly duckling in the garage. Had one of them years back myself.
 
blkcorvair said:
noticed the 914 ugly duckling in the garage. Had one of them years back myself.
Click to expand...

Had it for ten years, never driven it. I built a brand new engine for it two years ago and have barely touched it since (been working on getting this damn bike going instead). Right now it needs to be completely rewired from scratch... I'm really not looking forward to that. :mad:
 
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