collapse

www.cognitomoto.com

www.dimecitycycles.com

https://www.townmoto.com/collections/vanson-leathers


www.restocycle.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.bisonmotorsports.com

www.speedmotoco.com

www.lostapostlejewelry.com

www.sparckmoto.com

www.pistonsociety.com

www.steeltowngarage.com


Author Topic: CX500 minor bob job - whooooot issues solved goes like a bat out of hell, for an old bike at least  (Read 77744 times)

Offline Maritime

  • DTT SUPPORTER
  • *
  • Posts: 9428
Re: Cx500 minor bob job - Now it runs
« Reply #50 on: Jan 17, 2013, 22:11:56 »
Ha I have been to a strip joint called that in Montreal.  Was scary.  Makes more sense in beaver co.  Have to figure out how to mount the rear of the pan.  Want to keep the factory mounts but they are chunky.  We'll see what I can come up with.  Once the tail light gets here on sat I might do a small cowel on the back.  Bruce will have to decide.

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 axelcrypt

  • Posts: 75
Re: Cx500 minor bob job - Now it runs
« Reply #51 on: Jan 25, 2013, 05:25:51 »
Any updates?

PM sent about coffee

Offline Maritime

  • DTT SUPPORTER
  • *
  • Posts: 9428
Re: Cx500 minor bob job - Now it runs
« Reply #52 on: Jan 25, 2013, 08:30:43 »
Sadly no. I did get the tail light so I will maybe look at how I will mount it this weekend. Need to continue the tear down and the plywood arrived for the table so that will be needed soon.
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

  • DTT SUPPORTER
  • *
  • Posts: 3359
  • Science is true whether you believe in it or not.
    • Alpha Dog Customs
Re: Cx500 minor bob job - Now it runs
« Reply #53 on: Jan 25, 2013, 10:25:07 »
I'm jetting a CX500 in my shop right now. I am keeping the airbox, but I modified it. There is a rubber snorkel where the air enters the box. It's there mostly to reduce intake noise. I removed it. Inside the box is an aluminum perforated plate covered with fine mesh. I assume that it's there as a flame arrestor, but it clearly adds substantial restriction to flow. I yanked that out. Lastly, I replaced the filter with a K&N. These three changes will require substantial jetting changes.

I increased the main jet from 78 to 90, and the intermediate jet from 115 to 120.

I still have to adjust the valves, sync the carbs, and adjust the idle mixture. The bike seems waay too lean to me yet, but it's a little hard to tell with an ambient temperature of 25F! After I ran it for a while yesterday, I got a compression reading on warm engine of only 60-70 psi. I may try another Seafoam treatment, and run it a bit to see if it improves. I'm hoping that adjusting the valves will help it, too. If I don't get the compression up to at least 125 psi, a ring job is in this bike's future.

Since you plan to keep your airbox, I'll let you know what I end up with for jetting, as you will probably want to make the same airbox modifications that I did.

Anyone have jetting recommendations for me here?
...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.

Offline Maritime

  • DTT SUPPORTER
  • *
  • Posts: 9428
Re: Cx500 minor bob job - Now it runs
« Reply #54 on: Jan 25, 2013, 10:34:48 »
Thank ADC. I noticed all that crap in the airbox too. I actually have decided to go pods and try the jet kit posted buy a member for the CV carbs. A US company has done some homework and produced a pod package. I will use it then tweak the jets. If It still sucks I will put the airbox back with a K&N and try your trick. I'll post results here after the kits are ordered and arrive.  It is also way to cold here to run the bike and test for lean as well, my guess is I will be March or April before I can actually tune. 
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 Maritime

  • DTT SUPPORTER
  • *
  • Posts: 9428
Re: Cx500 minor bob job - Now it runs
« Reply #55 on: Jan 25, 2013, 10:43:05 »
Oh yes and valves are important for the compression check. I had one cylinder that was only off by a little and had compression of only 70, after valves were properly set it went to 120 cold.  I didn't do a warm to compare.
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

  • DTT SUPPORTER
  • *
  • Posts: 3359
  • Science is true whether you believe in it or not.
    • Alpha Dog Customs
Re: Cx500 minor bob job - Now it runs
« Reply #56 on: Jan 25, 2013, 11:25:16 »
I had to wait until today to adjust the valves, because the engine was still warm. I'll do it at some point today between rounds of shooting paint.
...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.

Offline Maritime

  • DTT SUPPORTER
  • *
  • Posts: 9428
Re: Cx500 minor bob job - Now it runs
« Reply #57 on: Jan 25, 2013, 11:35:11 »
Yep, gotcha, hope it helps.  Although a ring job on these bikes is really not bad at all.
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

Kamn

  • Guest
Re: Cx500 minor bob job - Now it runs
« Reply #58 on: Jan 25, 2013, 11:45:09 »
What are you guys running for exhaust?? if you are getting rid of the H-box or running a 2 into 1 with pods or a non stock air box, then the 90/120 will do just fine.
ALPHA, I hope the valve adjustment brings it back up to over 140psi........cold I would expect readings of 125 give or take. Rings are not being made for these anymore but I know that there are other rings that can be used. Hastings - part number 2C4186 and you will need to open up the top two piston ring grooves


Offline Maritime

  • DTT SUPPORTER
  • *
  • Posts: 9428
Re: Cx500 minor bob job - Now it runs
« Reply #59 on: Jan 25, 2013, 11:47:29 »
Stock exhaust for me right now.  Maybe aftermarket pipes. may remove cross over, may not.  It is all in good shape so will depend on where I have to spend other $$ what get's used.
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