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Author Topic: New CZ Parts  (Read 11229 times)

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Ji Gantor

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Re: New CZ Parts
« Reply #30 on: March 30, 2009, 10:22:42 pm »
Hi Shortshifter,
Thanks for your kind words.
From what I can see through the exhaust port the engine has new piston and rings and the bore has been honed. The clutch looks cool. I have purchased all the components to set up the points system because the CDI for these is $700.00 and I just don't have the money at this time. I tried kicking the engine over when I first got it and it has so much compression my 86kilos just hovered on top of the kick lever.

So to answer your question, I was going to send the engine to Les at Mainly Maico but after discussions with Les and photos of what I have found during the strip down it has been decided to install it as it is.

Ji
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Ji Gantor

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Re: New CZ Parts
« Reply #31 on: March 30, 2009, 10:23:59 pm »
New piston and rings.

Ji
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Ji Gantor

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Re: New CZ Parts
« Reply #32 on: March 31, 2009, 09:47:28 am »
When the new parts turn up I always take the time to take a good look at them for any imperfections. I also unite them with their bike buddy to see they fit.

The new muffler system fits into the existing header pipe but (lets say) during transit the silencer end flange became bent. This deformation prevents the circlip and silencer from being removed. I need to check to see if the silencer has been packed so out comes the dolly and brass hammer.

Ji
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Ji Gantor

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Re: New CZ Parts
« Reply #33 on: March 31, 2009, 09:50:55 am »
A few minutes later the flange was back to where its designer intended it to be.
I removed the circlip and silencer and yes it had been packed.

Ji
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Ji Gantor

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Re: New CZ Parts
« Reply #34 on: March 31, 2009, 10:29:49 am »
This muffler has what is called a factory finish.
Some bike owners love this finish, while others do not.
There are a few different ways to finish this muffler to suite all owners.
The first is as is and let it rust a little bit.
The second is to spray oil on to the muffler and let the heat from the engine caramelise it so you still get the factory finish but if done right it will not rust.
The third way is to use a heat proof paint and give it a protective coating. The reason heads, cylinders and mufflers are painted black is to disperse heat. The colour black disperses more heat than any other.
The fourth would be some kind of nickel coating and so on until you run out of money.

I like my pipes to be black to disperse as much heat as possible and to prevent rusting.
That said I now have to prepare the pipe for paint.

The blue ring around all the welds has to be removed. This blue is from the heat and is oxidation or the beginning of rust.


Ji
« Last Edit: March 31, 2009, 10:33:48 am by Ji Gantor »
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Ji Gantor

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Re: New CZ Parts
« Reply #35 on: March 31, 2009, 10:45:34 am »
After about a minute the blue ring is gone along with the baked on flux.
I used a wire brush attached to an air die grinder.
This surface is now starting to look good.

Ji
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Offline paul

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Re: New CZ Parts
« Reply #36 on: March 31, 2009, 10:52:02 am »
JI I MIGHT SEND A MAICO TO YOU AND I CAN SIT BACK AND WATCH FOR A CHANGE ;)
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Ji Gantor

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Re: New CZ Parts
« Reply #37 on: March 31, 2009, 12:32:46 pm »
After an hour or so the wire brush has done the job.
Now for the finishing touch, take some 400 weight wet and dry and give the pipe a sand in the long direction. This will line up the grain in the metal so the paint sits flat.

When ever working on pipes always ware latex gloves or the sweat from your hands will start it rusting before you are finished. With a mineral turps soaked rag give the pipe a good clean and then place it in the sun to dry.

Ji
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Ji Gantor

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Re: New CZ Parts
« Reply #38 on: March 31, 2009, 12:37:59 pm »
The manufacturer has pride in his work and to show this they have attached a plaque with their name on it. Unfortunately for us restorers this plate makes it hard to finish the pipe right, so we have to decide will we cut it off or can we work around it. Before cleaning I played with the plate so it will be easy to paint later.

Ji
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Ji Gantor

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Re: New CZ Parts
« Reply #39 on: March 31, 2009, 12:56:51 pm »
Once it is dry and warm time to give it a hit with the heat proof primer.
Looking good.

Ji
« Last Edit: March 31, 2009, 09:21:35 pm by Ji Gantor »
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Ji Gantor

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Re: New CZ Parts
« Reply #40 on: March 31, 2009, 02:41:13 pm »
I have made up a quick shield to stop over spray.
This is to let the red paint coat the pipe as a background for the makers mark.

Ji
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Ji Gantor

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Re: New CZ Parts
« Reply #41 on: March 31, 2009, 02:44:00 pm »
With the shield in place I have sprayed a coat of red paint to high light the makers mark.
It will need another coat of red before the black paint is applied.


Ji
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Offline HL400

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Re: New CZ Parts
« Reply #42 on: March 31, 2009, 06:04:52 pm »
Hey Ji, what size is the main jet in the new carby ??  HL
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Ji Gantor

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Re: New CZ Parts
« Reply #43 on: March 31, 2009, 06:35:45 pm »
Hi HL400,
What carb have you got.

Ji
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Offline HL400

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Re: New CZ Parts
« Reply #44 on: March 31, 2009, 07:28:35 pm »
its a Mikuni same as yours. it should be hear tomorrow, I got it from Les.

but I have been getting as much infomation as I can as I have to race it this Sunday at Ravenswood in Vic so I am working out what jets I should take with me   HL
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