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Messages - Jan B

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46
Anorak's Corner / Re: Moulded N.L.A. Unobtanium Parts
« on: February 22, 2023, 06:03:24 PM »
Brilliant idea. Going to give it a try too. Thanks for sharing!

47
Misc / Open / Re: Wheeler Dealers Trading up CB750
« on: April 03, 2022, 12:20:28 PM »
Ed China lives on YouTube nowadays..

48
Project Board / Re: 1975 CB750 P2 Police Bike
« on: April 02, 2022, 09:03:11 PM »
Just landed here tonight and read the whole thread in one go. Absolutely amazing shed you have ;) And a really nice bike.

You really nail this restoration!!

49
CB500/550 / Removing the plastic rear mudguard/fender
« on: January 02, 2018, 02:17:43 PM »
Almost entirely dismantled the frame. The only part that is bothering me is the rear plastic mudguard/fender. It is held in place by several tabs welded to the frame. The only way i see to remove the mudguard is to bend the tabs open. I don't like that because when the frame is finished with paint i am afraid that when i bend the tabs back the new paint will come off.

So any suggestions on how to proceed?

Cheers Jan

50
New Member Introductions / Re: Hello from the Netherlands
« on: December 18, 2017, 09:56:54 AM »
I think you will have a laugh at me now....

The problem is that cup is very thin and heats up very quickly. The hole is near the hex shape at the bottom.Its much thicker there.

K2-K6 is right about the hard surface finish. Thats why you first lay dow a drop or two of liquid solder. Then you scratch with a stainless brush or something sharp in the liquid. Thus you break up the hard finish and the solder starts to bond with the "monkey metal". In this way there will be no re-oxidation of the surface because of lack of oxygen.

I've seen it done on carb parts on a classic event in the Netherlands. The solder is also called "Alutite".

I didn't make it that far because before the part with the hole became hot enough, the thin cup wall already melted. I should have applied the heat from underneath.

Lessons learned!

Cheers Jan


51
New Member Introductions / Re: Hello from the Netherlands
« on: December 02, 2017, 11:17:56 AM »
Thanks guys for all the replies. I feel instantly at home here at the forum!

I guess soldering is the more appropriate word for what i had in mind. Didn't quite figure it out yet what alloy these parts are made off. Can't find any reference for "monkey metal"  ;).
The alloy is mainly zinc with additions of magnesium, aluminum and copper. Often referred to as ZAMAK. Am i right?

I think i'll give it a try with Durafix, witch is available in the Netherlands.

Some of you pointed out the possibility of a fuel leak and the adherent risk of fire. Thanks for that. If a im not for 100% confident that its safe i will swap the bowl immidiatly.

And very generous of Menno to offer pre owned ones. I like that more than a new one because of the patina!


Cheers,

Jan

52
New Member Introductions / Re: Hello from the Netherlands
« on: November 30, 2017, 09:28:58 PM »
First challenge encountered....
While cleaning the cup of the petcock with vinegar (is has some "scale" buildup on the inside) a tiny hole appeared. See the picture. I can buy a new cup (€10 ex shipping), but i consider that being my last resort..
I am going to try to braze the hole from the inside to a close. If i screw up i'll buy a new one. Gaining some experience in brazing is a good thing to me.
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53
New Member Introductions / Hello from the Netherlands
« on: November 29, 2017, 09:37:42 PM »
Oh dear what have i got myself into?? Bought a 1974 CB 500 and i am planning a full restoration. Midlifecrisis takes its toll. Anyway, already having great fun in dismantling the bike and documenting the lot. In the meanwhile already started restoring the petcock with meticulous care. Sourcing parts at a reasonable price is quite a sport.
Al this and not even passed my driving exam yet. Where does this take me? Having tasted the forum i am afraid I contracted a virus with no cure.
I hope to find here some support in my efforts to restore the bike to nearly new condition. I like some patina witch seems appropriate for a bike 40+ years old.
I'll to post some pics now then to keep you posted but i will take my time.

Cheers from the Netherlands,

Jan

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