Next Rebuild Z50AK1 Silver Tag

[JHminitrails]

Can say I ever have but I have used a piece of an old handle bar to repair a ct70 exhaust pipe where they rust out under the guard insulator .. works great, thicker tube and already chrome,,, welds get mostly hidden under the guard although not for a show bike it’s a good easy repair for a rider..

Funny you say this, I was going repair my recently acquired muffler headpipe using a chunk of the handlebar tubing too, but I ended up finding a good chunk of original headpipe in my junk, so I used it to replace the usual broken area you mention. Once it's painted and installed, like you say it is all hidden anyways.

Making a little headway, I was surprised how well the wheels cleaned up, not many nicks and dings, anyone ever tried to fab a custom pipe out of an old handlebar?

I've had this exact thought cross my mind too! Lol. It's pretty thick walled pipe so once it was done it would be far better than the original headpipe. I think you have to proceed with this custom fabrication job just to satisfy mine and Roberts curiosity! I like your creativity and thinking hambone.

 

[Gary]

I pulled a tube on a k0 that must have had 11 patches. Lived its life on a farm i reckon.

Part of the problem is the tires are so thin between the blocks. I remember as a youth my dad must have dropped a toothpick in the drive -I found it with the Z. Last summer the CT kept getting a flat,but it took like 2 weeks to go down. Finally decided to find what was wrong,it was a very small thorn. We have a bunch of wild raspberries around the property,I suspect it was one of those.

 

[Gary]

If those are the double nut valve stem tubes try to save them or pass them on if you don't want to use them. I had one of my originals and kirrbby fixed me up with another. I put a couple of patches on them and was able to clean the rim rust off in my cabinet. I was amazed how it turned out - here is the before and after

 

[Robert thran]

i think that cylinder would work buts it’s a later cylinder..notice the 49Cm where your original says 49cc..being it’s a numbers matching bike I would personally just buy a 3rd over piston kit and have it bored keeping it all original ..I’m sure 3rd over would clear any rust for a good rebuild..second over might even clear it out? I might have a good bore stock cylinder with the 49cc stamping..I’ll look when I get home..if I do it’s yours for free if you want. A lot of peoples bore bars wouldn’t go down far enough around here to do a 50cc. I only know one guy.

Hambone I inspected all my 49cc cylinders,, I have 5 but there all rusty in the bore like yours or super rusty on the outside.,, not sure if you have any stock 70cc heads but I think you could bore the orignal 49cc cylinder to a stock 70cc bore and have a 70 that looked like a stock 50….sleeper? Lol 😆 I’m not saying do it just a thought….

 

[loopiemclooperson]

If those are the double nut valve stem tubes try to save them or pass them on if you don't want to use them. I had one of my originals and kirrbby fixed me up with another. I put a couple of patches on them and was able to clean the rim rust off in my cabinet. I was amazed how it turned out - here is the before and after

Gary - the tubes turned out great.
When you say cabinet, can I take you are media blasting them?

 

[Gary]

Yes I have a TP Tools cabinet,one of the best things I ever bought.

 

[hambone]

Gary
I think I sliced up the tubes when I cut the tires off, wasn't thinking.

Robert
No problem on the cylinder, we are going to bore mine 2nd over, was told it should clean up.

JHMT
If I ever build a mini trail rat rod, it will have a handlebar exhaust, wouldn't take much, I have a lot of pipe dreams.

 

[hambone]

Got the frame bead blasted and first sanding with 150gt., going to hit it again with 220gt. and put some primer on it. I inspected the frame after blasting, no cracks, should be good to go.

 

[hambone]

Now that the CT's are roadworthy, it's back on the Z50, took the tank to the body shop to check on some paint, one of the painters said he had painted a truck a couple months back that was close to my color. He said it was a Ford blue pearl, he said he saved a little and came up with over 1/2 quart and donated it to my project. When he showed me a picture of the truck, I thought it was a little dark, but when I tried a test spray, it's not that bad off.

 

[hambone]

Frame turned out well, I think I can live with the color even though it's a little darker, looks nice in the sun.

 

[power6994]

That looks nice and photos never really bring the true colours through multiple screens, but just remember that it's way easier to change the colour now if you're not 100% happy.

 

[hambone]

I don't think I would have made it as a body man, something about round edges and body filler doesn't work well with me. After several wipes of the filler and a lot of sanding, I was able to remove the dings out of the tank, also had to repaint the red in the badges.

I made a templet of the paint line, just not sure my taping skills are any better than my sanding skills, the only thing I have going for me is, you can't see both sides at the same time. lol!

 

[Robert thran]

Hambone ,, get some high build primer ( not rattle can) and you will be able to hand sand all the dents/body work out.. if your only comfortable with rattle can get the transtar 4603 . It’s very sandable but doesn't go on as thick as when shooting through a gun. Also I would put I piece of tape over the threaded holes for the tank badges as primer and paint will fill in the tiny threads.

 

[hambone]

Hambone ,, get some high build primer ( not rattle can) and you will be able to hand sand all the dents/body work out.. if your only comfortable with rattle can get the transtar 4603 . It’s very sandable but doesn't go on as thick as when shooting through a gun. Also I would put I piece of tape over the threaded holes for the tank badges as primer and paint will fill in the tiny threads.

My plan is this, couple coats of self etching, several coats of high build, sand it down, paint the tank silver, tape off for blue paint, 3 coats of blue, then I will lightly wet scuff it with gray Scotchbrite, add 3 coats of clear. Hope it works out for me.

 

[Robert thran]

The one time I tried it that way the blue very slightly ran into the silver when I sprayed on the clear leaving a blurry line between the colors…just paint the silver and shoot one coat of clear..wait a day or so and lightly scuff the whole tank with 800…tape your line and spray the blue Then reclear the whole tank with as many coats as you want..you will get a much finer line between the colors…

 

[hambone]

The one time I tried it that way the blue very slightly ran into the silver when I sprayed on the clear leaving a blurry line between the colors…just paint the silver and shoot one coat of clear..wait a day or so and lightly scuff the whole tank with 800…tape your line and spray the blue Then reclear the whole tank with as many coats as you want..you will get a much finer line between the colors…

Thanks for that info Robert, I didn't think about it bleeding, I will use the clearcoat trick.

 

[Robert thran]

There’s a chance the type paint you use may not have that problem but I wouldn’t take the chance. The solvents in the clear make the colors bleed ..

 

[hambone]

Testing the paint line with painters tape, the blue invaded the silver, thanks for the heads up Robert, the body shop said they had some tape that would be a better option, definitely will hit it with a coat of clear first. Kirby hooked me up with a headlight ear awhile back, I tig welded it back on, looks great, thanks Kirb.

 

[kirrbby]

 

[hambone]

Got a new pair of shoes today.