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Author Topic: CX500 minor bob job - whooooot issues solved goes like a bat out of hell, for an old bike at least  (Read 45680 times)

Online Maritime

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So i got 10 mins wirh the cx to test compressio.  Results 120 - 90.  Shit.  Have to check valves.  Put oil in low cilynder.  No change.  Must be valves.  Hope it is just adjustment.  So plans are a removal of huge signals and tails.  Clean, paint, new seat,  I like the bars and headlight.  Front will be lowered and it will be good to go.  Low budget.  Got it for 250. 

Sent from my MB525 using Tapatalk 2
« Last Edit: Nov 11, 2013, 16:49:47 by Maritime »
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 JustinLonghorn

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Re: Cx500 minor bob job.
« Reply #1 on: Nov 15, 2012, 15:25:16 »
I'm in.
"Art is never finished, it is only abandoned."

"Motorcycles do not define a person's character." -BigRich

My Dearest Darling -Sold

CB400F

Online Maritime

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Re: Cx500 minor bob job.
« Reply #2 on: Nov 15, 2012, 15:27:12 »
So also when I hooked up a good battery I prompley blew a fuse or something.  Yay.  I am at the dentist now and will get to the valves when I get home.  Had to do c test by using booster cables to the starter motor.

Sent from my MB525 using Tapatalk 2
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 AlphaDogCustoms

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Re: Cx500 minor bob job.
« Reply #3 on: Nov 15, 2012, 16:08:47 »
Check to be sure you didn't reverse the battery polarity.
...every dump I take is original too, and it doesn't smell any better because of it's originality.

Alpha Dog Custom Cycles
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I'm so old, I even know what ignition points are.

Online Maritime

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Re: Cx500 minor bob job.
« Reply #4 on: Nov 15, 2012, 16:12:55 »
Got polarity right. Lights were on etc.   Just popped when i hit the start botton.  I am going to adjust valves then check comp again.  The start stripping everything to get to work.  Pics of progress later tonight I hope.

Sent from my MB525 using Tapatalk 2
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 Big Rich

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Re: Cx500 minor bob job.
« Reply #5 on: Nov 15, 2012, 16:56:41 »
Signed up for sure on this one.

Offline Ringo

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Re: Cx500 minor bob job.
« Reply #6 on: Nov 15, 2012, 17:00:00 »
As am I.
Chris

Online Maritime

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Re: Cx500 minor bob job.
« Reply #7 on: Nov 15, 2012, 21:42:13 »
Ok.  So the manual sucks but google foo and vakves checked.  Offending cylinder had a tight intake.  Adjustment done and bang 125 psi.  Redid other and te same.  Found bad fuse.  10 amp in a spot should have been 20.  Put a 30 in for now. Will be putting all new blade fuses in and moving fuse box anyway.  Lovely oil.  Lots of condensation.  Flushed it out.  Valves look alright though

Sent from my MB525 using Tapatalk 2
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

Online Maritime

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Re: Cx500 minor bob job.
« Reply #8 on: Nov 15, 2012, 22:13:31 »
ok good night so far.  on a computer now so typing gets better.  Here is kind of the direction for this bob.  Moto Mucci I think is the name of it.  It is a Cafe but the minimalist clean lines are the direction I want to take.  picture the mucci bike with the bars and tank from mine basically.

Pic
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 Big Rich

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Re: Cx500 minor bob job.
« Reply #9 on: Nov 15, 2012, 22:41:36 »
Mike, there is a guy near me that might have a CX tank like that....if I get a chance to talk to him, I'll see if he has it and is willing to part with it.

And how does oil ever get that bad? Coolant leak?

Offline HerrDeacon

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Re: Cx500 minor bob job.
« Reply #10 on: Nov 16, 2012, 06:51:39 »
Mike, 125 psi is still really low, well below spec. Should still run with 125 but not well.
Perry

1972 Honda CB350 K4 / 1978 Honda XL250S /1982 Honda MB5 / 2014 Honda CB500X

Online Maritime

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Re: Cx500 minor bob job.
« Reply #11 on: Nov 16, 2012, 08:38:09 »
Nope, straight up condensation from running a short time and them storing in freezing temps, then thawing out again. I had my 450 oil turn that color once and it was aircooled.  Looks bad but if I ran it to proper operating temp for a half hour most of the water would evaporate out and the oil would look normal.  But it would also not protect the motor for the first part so I drained it and left the heads off etc in the warm basement to get the water out.  The heads and everything had moisture in them, warm air meets cold surface = water.
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

Online Maritime

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Re: Cx500 minor bob job.
« Reply #12 on: Nov 16, 2012, 08:40:34 »
Mike, 125 psi is still really low, well below spec. Should still run with 125 but not well.

I know, but it was a cold compression check, it will bump once warm.  My first check on my 450 motor was 125, after it was run a few times and operational a warm went to 155-160.  Also I only cranked the motor enough to see the needle bump 3 times and stopped. might have been higher if I let it go 5.  Didn't want to push it with the shit oil and all the moisture.


Edit, maybe your right, I couldn't find the numbers last night the manual i got sucks even worse then the other clymers I have. It says 171 +- 28 so I should maybe check it again and see.  That should be a warm compression number though, I usually see approx 20-30 PSI increase when doing a warm engine and that puts it on the low side of the range.  Now I need to get the carbs cleaned and fire this thing to see if it may need a top end rebuild.
« Last Edit: Nov 16, 2012, 08:50:46 by Maritime »
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

Online Maritime

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Re: Cx500 minor bob job.
« Reply #13 on: Nov 16, 2012, 08:56:42 »
Oh and Rich, thanks fro the thought on the tank. My Dad-in-law that the bike is for isn't into cafe, low bars etc, more the bobber thing for hims so the C tank is fine. If it was me, I'd be all over the other style tank.
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 AlphaDogCustoms

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Re: Cx500 minor bob job.
« Reply #14 on: Nov 16, 2012, 10:49:12 »
I know, but it was a cold compression check, it will bump once warm.

I agree. It's not at all unusual for an engine that has been sitting a long time to read a bit low. I have a CX500 in my shop right now that hasn't been run for a long time. Compression is low. I am going to dump some Seafoam into the spark plug holes to make sure the rings are free, and run it before I condemn it to a ring job.
...every dump I take is original too, and it doesn't smell any better because of it's originality.

Alpha Dog Custom Cycles
Painting
Powdercoating
Custom Fabrication
Repairs
I'm so old, I even know what ignition points are.