Topic: Bike from scrapyard Saudi

[grcamna2]

Ed March gets about a bit on his C90 cub 😀

I couldn't imagine doing that on a c90, I def want a big bike under me when I go back. That video cracks me up and is pretty damn accurate, so happy he caught an accident on camera lol....I #$%*ing hated driving in traffic there as a passenger....i kept my head down the entire time.

Ed March is on a great adventure 

[Gamma]

Oil tank was a little rusty inside so, I used hydrochloric acid (muriatic acid) to clean it. It’s now flash rusting ☹️. So I’ve ordered some phosphoric acid (jenolite) hopefully that will clean it and give it a protective coating inside?

[Gamma]

Don’t use muriatic acid in the oil tank, it cleans the rust out, then I used phosphoric acid which really just made a mess inside. So I’m thinking of getting another tank which is rust free inside and doing the brazing again.

[Gamma]

So I checked out the CR29 carbs to see what jets are installed etc: so that I have a known starting point.  Mains were 120 and slow jets 60, needle clips in 4, as per spec. Air jets are 240, standard spec is 250. Starter jet is 40, standard is 45.  From what I’ve read about that, 40 is better.  I then statically balanced them.
Then installed them and am now working on making barbs, so I can balance them

[BenelliSEI]

Don’t use muriatic acid in the oil tank, it cleans the rust out, then I used phosphoric acid which really just made a mess inside. So I’m thinking of getting another tank which is rust free inside and doing the brazing again.

Surprised the phosphoric mad such a mess? I just bought a jug at a Farm store (1 gallon, probably 75% acid), diluted it 10:1 with water (10) and every rusty crappy thing I throw I. Comes out spotless.

[grcamna2]

This is getting much closer to completion Gamma 

[Gamma]

Well the muriatic acid cleaned out all the rust, but the jenolite turned it black as expected, but I wasn’t happy with the  finish as I thought it was too thick and would come off, so I did the whole thing again and made it worse😃
I may do it once more and thin the jenolite down a bit

[BenelliSEI]

Well the muriatic acid cleaned out all the rust, but the jenolite turned it black as expected, but I wasn’t happy with the  finish as I thought it was too thick and would come off, so I did the whole thing again and made it worse😃
I may do it once more and thin the jenolite down a bit

Gamma..... I brewed at 10:1 with water. The “farm product” I bought is for cleaning out milking equipment after use (100:1). Reading the 1 gallon jug label, it’s about 75% phosphoric acid. It leaves nothing and no black colouring. A few days ago, I threw in lots of small bits. This choke lever was totally covered in rust. Came out spotless.... what’s in Jenolite?

P.S. following your build. Nice work!

[Alan F.]

Well the muriatic acid cleaned out all the rust, but the jenolite turned it black as expected, but I wasn’t happy with the  finish as I thought it was too thick and would come off, so I did the whole thing again and made it worse😃
I may do it once more and thin the jenolite down a bit

Gamma..... I brewed at 10:1 with water. The “farm product” I bought is for cleaning out milking equipment after use (100:1). Reading the 1 gallon jug label, it’s about 75% phosphoric acid. It leaves nothing and no black colouring. A few days ago, I threw in lots of small bits. This choke lever was totally covered in rust. Came out spotless.... what’s in Jenolite?

P.S. flowing your build. Nice work!

Was it called Milkstone Remover?

https://www.tractorsupply.com/tsc/product/dairyland-sterosol-milkstone-remover-acid-rinse-2214079?store=1559&cm_mmc=feed-_-GoogleShopping-_-Product-_-2214079&gclid=CjwKCAiAg8OBBhA8EiwAlKw3kqZK902EoIf9HGXo7vaKXjyzvwc05K2VlvBGP27Co7v024QTV7nBGhoC1DIQAvD_BwE

[BenelliSEI]

Well the muriatic acid cleaned out all the rust, but the jenolite turned it black as expected, but I wasn’t happy with the  finish as I thought it was too thick and would come off, so I did the whole thing again and made it worse😃
I may do it once more and thin the jenolite down a bit

Gamma..... I brewed at 10:1 with water. The “farm product” I bought is for cleaning out milking equipment after use (100:1). Reading the 1 gallon jug label, it’s about 75% phosphoric acid. It leaves nothing and no black colouring. A few days ago, I threw in lots of small bits. This choke lever was totally covered in rust. Came out spotless.... what’s in Jenolite?

P.S. flowing your build. Nice work!

Was it called Milkstone Remover?

https://www.tractorsupply.com/tsc/product/dairyland-sterosol-milkstone-remover-acid-rinse-2214079?store=1559&cm_mmc=feed-_-GoogleShopping-_-Product-_-2214079&gclid=CjwKCAiAg8OBBhA8EiwAlKw3kqZK902EoIf9HGXo7vaKXjyzvwc05K2VlvBGP27Co7v024QTV7nBGhoC1DIQAvD_BwE

Allan..... i think the name on this jug is ”Dicoloid”. I will take a photo later. Previously, I used to buy “Stern’s Milkstone Remover”. The place I go to is a real Farm Store (in a huge barn on a century farm property). The fellows there said this is the “same stuff”. I pulled more parts out this morning and they are truly spotless. Three of the pieces are the threaded eyelets that connect the choke levers, across the carbs. They were seized solid. After I pull them out, they all screw in and out!

[grcamna2]

Well the muriatic acid cleaned out all the rust, but the jenolite turned it black as expected, but I wasn’t happy with the  finish as I thought it was too thick and would come off, so I did the whole thing again and made it worse😃
I may do it once more and thin the jenolite down a bit

Gamma..... I brewed at 10:1 with water. The “farm product” I bought is for cleaning out milking equipment after use (100:1). Reading the 1 gallon jug label, it’s about 75% phosphoric acid. It leaves nothing and no black colouring. A few days ago, I threw in lots of small bits. This choke lever was totally covered in rust. Came out spotless.... what’s in Jenolite?

P.S. flowing your build. Nice work!

Was it called Milkstone Remover?

https://www.tractorsupply.com/tsc/product/dairyland-sterosol-milkstone-remover-acid-rinse-2214079?store=1559&cm_mmc=feed-_-GoogleShopping-_-Product-_-2214079&gclid=CjwKCAiAg8OBBhA8EiwAlKw3kqZK902EoIf9HGXo7vaKXjyzvwc05K2VlvBGP27Co7v024QTV7nBGhoC1DIQAvD_BwE

Allan..... i think the name on this jug is ”Dicoloid”. I will take a photo later. Previously, I used to buy “Stern’s Milkstone Remover”. The place I go to is a real Farm Store (in a huge barn on a century farm property). The fellows there said this is the “same stuff”. I pulled more parts out this morning and they are truly spotless. Three of the pieces are the threaded eyelets that connect the choke levers, across the carbs. They were seized solid. After I pull them out, they all screw in and out!

John,are you going to re-plate those choke pieces ?

[Gamma]

I think that Jenolite contains phosphoric acid. But there’s nothing to say this on this label.  I’m going to try it one more time with a weaker solution. I was hoping for a similar result as your choke lever. Just a thin protective coating that prevents flash rusting

[BenelliSEI]

Well the muriatic acid cleaned out all the rust, but the jenolite turned it black as expected, but I wasn’t happy with the  finish as I thought it was too thick and would come off, so I did the whole thing again and made it worse😃
I may do it once more and thin the jenolite down a bit

Gamma..... I brewed at 10:1 with water. The “farm product” I bought is for cleaning out milking equipment after use (100:1). Reading the 1 gallon jug label, it’s about 75% phosphoric acid. It leaves nothing and no black colouring. A few days ago, I threw in lots of small bits. This choke lever was totally covered in rust. Came out spotless.... what’s in Jenolite?

P.S. flowing your build. Nice work!

Was it called Milkstone Remover?

https://www.tractorsupply.com/tsc/product/dairyland-sterosol-milkstone-remover-acid-rinse-2214079?store=1559&cm_mmc=feed-_-GoogleShopping-_-Product-_-2214079&gclid=CjwKCAiAg8OBBhA8EiwAlKw3kqZK902EoIf9HGXo7vaKXjyzvwc05K2VlvBGP27Co7v024QTV7nBGhoC1DIQAvD_BwE

Allan..... i think the name on this jug is ”Dicoloid”. I will take a photo later. Previously, I used to buy “Stern’s Milkstone Remover”. The place I go to is a real Farm Store (in a huge barn on a century farm property). The fellows there said this is the “same stuff”. I pulled more parts out this morning and they are truly spotless. Three of the pieces are the threaded eyelets that connect the choke levers, across the carbs. They were seized solid. After I pull them out, they all screw in and out!

John,are you going to re-plate those choke pieces ?

Yes.... I have a home made zinc plating set up that is OK for small stuff.....

[grcamna2]

Well the muriatic acid cleaned out all the rust, but the jenolite turned it black as expected, but I wasn’t happy with the  finish as I thought it was too thick and would come off, so I did the whole thing again and made it worse😃
I may do it once more and thin the jenolite down a bit

Gamma..... I brewed at 10:1 with water. The “farm product” I bought is for cleaning out milking equipment after use (100:1). Reading the 1 gallon jug label, it’s about 75% phosphoric acid. It leaves nothing and no black colouring. A few days ago, I threw in lots of small bits. This choke lever was totally covered in rust. Came out spotless.... what’s in Jenolite?

P.S. flowing your build. Nice work!

Was it called Milkstone Remover?

https://www.tractorsupply.com/tsc/product/dairyland-sterosol-milkstone-remover-acid-rinse-2214079?store=1559&cm_mmc=feed-_-GoogleShopping-_-Product-_-2214079&gclid=CjwKCAiAg8OBBhA8EiwAlKw3kqZK902EoIf9HGXo7vaKXjyzvwc05K2VlvBGP27Co7v024QTV7nBGhoC1DIQAvD_BwE

Allan..... i think the name on this jug is ”Dicoloid”. I will take a photo later. Previously, I used to buy “Stern’s Milkstone Remover”. The place I go to is a real Farm Store (in a huge barn on a century farm property). The fellows there said this is the “same stuff”. I pulled more parts out this morning and they are truly spotless. Three of the pieces are the threaded eyelets that connect the choke levers, across the carbs. They were seized solid. After I pull them out, they all screw in and out!

John,are you going to re-plate those choke pieces ?

Yes.... I have a home made zinc plating set up that is OK for small stuff.....

Like !!

[Gamma]

I wonder if I could zinc plate inside an oil tank?
I have done quite a few bits previously with my own set up.

[PeWe]

But if or when it come loose, it will pass the pump and hopefully stop in oil filter.

Rust in oiltank no problem on running bikes.  Oil prevent rust

Mostly  bikes parked outdoor for decades without oil get rusty oil tanks, right?

[BenelliSEI]

I wonder if I could zinc plate inside an oil tank?
I have done quite a few bits previously with my own set up.

I need to work harder on my skills! Those parts look great!

[Gamma]

You are right PeWe, my oil tank was in a scrapyard in the desert for 30 years. I was really only concerned about the rust inside the top of the tank where the oil doesn’t normally cover except for vapours. I expect I’m being too cautious.
BenelliSEI, thanks for the comment. The plating I did was after reading other people’s articles on this forum and elswhere. I put my process in the tips section.

[PeWe]

Some rust removal if still rust there?
This is a point on the check list, ensure no rust here.

[Gamma]

I have been busy re-designing the battery tray and wiring and tank strap support. I will have to put the battery on end, going to use a 12v 12ah AGM.

[Gamma]

Oil tank is now done

[BenelliSEI]

So I checked out the CR29 carbs to see what jets are installed etc: so that I have a known starting point.  Mains were 120 and slow jets 60, needle clips in 4, as per spec. Air jets are 240, standard spec is 250. Starter jet is 40, standard is 45.  From what I’ve read about that, 40 is better.  I then statically balanced them.
Then installed them and am now working on making barbs, so I can balance them

Curious about the syncing barbs. Do you glue them in? Leave em their permanently? Just drill a hole and pushe them in? I need to do something similar on my chopper with the KZ1000 carbs.

[Shtonecb500]

i need to see that chain guard, please.

[Gamma]

BenelliSEI, I made the barbs from aluminium on my small lathe and drilled holes in the inlet rubbers and pushed them in with bathroom silicone with the intention of leaving them in. But the silicone doesn’t hold them, and they can be pulled out.  So I made some new ones with a little step in the middle, and drilled some hose clampers so the clamp will not let them come out, and also used silicone to put them in, I don’t want to run lean while riding it. I use brake callipers bleed nipple covers on the ends

[Gamma]

Shtonecb550, I made the chain guard at work from aluminium, before I retired😄