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Author Topic: Montreal Manchild with an '81 Honda CB750K  (Read 37641 times)

Offline Maritime

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #30 on: Nov 23, 2016, 11:15:47 »
I have a local dealer I go to for those things and funny enough they have the stuff shipped in from MTL so there is a Honda Distributor there. Not sure what your local dealers are like there but they should be able to get you the parts next day.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #31 on: Nov 24, 2016, 10:51:24 »
I spoke with my local shop and he can get pretty much what I need and pretty quick too.  He's a cool guy too, and has been over to my garage to check the bike over and run a compression test (all for a few beers).  I've ordered the shim tool online which should be here next week - after running the valve clearance test it looks like I'll need to switch out some shims too.  No idea (yet) what to do if some of the valves are shot, but that's for another day.

Thanks for your advice in the other thread - I'll try the some oil in the cylinder and see what gives.  This is by some margin the deepest I've got into an engine, so your help is very gratefully received, thanks man =)

By the way, when I took off the valve cover, there was so much oil in the cylinder head that it overflowed when I turned the crankshaft.  How much oil in there is too much?  I had to wick some out in order to be able to see where to put the feeler gauges!
« Last Edit: Nov 24, 2016, 10:57:56 by The Jimbonaut »
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline Maritime

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #32 on: Nov 24, 2016, 10:58:06 »
Cool, we've all been there and this place has helped me become almost competent at mechanics ;D
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #33 on: Nov 24, 2016, 11:56:12 »
Amen to that - I've got a Yamaha V Star 1100 Custom - the forums I joined to help me out with some issues I've had with that bike have helped me out no end.  It's like having a small team of experts sitting in your toolbox =)

Here's a photo showing (hopefully) the amount of oil in the cylinder head -



It looks like some kind of oil spa for cams - they're lording it up in there like overweight and ageing 80's pornstars, kicking back and soaking it up.  All they need is a couple of cigars and they're set.  Is that too much oil?  It literally overflowed when I turned the crank.  Might the oil not be draining - or moving around the engine - the way it should?  Could it be a sign of a blockage somewhere, or is it perfectly normal?  The photo shows the exhaust cam by the way.

"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline Maritime

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #34 on: Nov 24, 2016, 13:02:54 »
lots of oil is good as long as it isn't gummy or jelly like. or milky which would mean moisture getting in.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline farmer92

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #35 on: Nov 24, 2016, 13:10:18 »
Yeah, most people worry about not enough oil in the heads haha
It should drain down the center with the cam chain.
You want the lobes to be well lubed up. 

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #36 on: Nov 24, 2016, 13:32:25 »
Ah, well that's good.  My pornstar cams can carry on chilling the &*%$ out then =)
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #37 on: Nov 30, 2016, 14:18:27 »
Got the shims measured and found an old school Honda mechanic here who was happy to swap out some the ones out I needed, all is good.  Gonna get them in place and then run another compression test. 

I also got hold of a can of Honda Carburetor/Combustion Chamber Cleaner which is supposed to help clear out carbon deposits from inside the cylinders.  I'll let you know how I get on, and hoping to sort out the compression issue in cylinder 1...
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline Maritime

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #38 on: Nov 30, 2016, 14:34:22 »
Fingers crossed it's just carbon build up and you free the rings.  worth a shot.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #39 on: Nov 30, 2016, 14:45:18 »
That's what I figured Maritime, worth a shot.  My man Gabriel told me to empty a good 5 seconds worth of the can into each carb, engine running at about 5000 rpms, and to expect a drop in rpm once I start the spray.  One thing I didn't ask him is how to clean out any carbon that's dislodged?  The can says to "blow out deposits" but I don't have an air compressor (if that's what the instructions meant), and don't know where to blow anyway. 

Any ideas?
"I'm telling you Donnie, nuthin' but nuthin' but right"