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Z1B Restoration

Work in Progress

Moderators: KeithZ1R, chrisu, paul doran, Taffus

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Wrigers
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Z1B Restoration

#1 PostAuthor: Wrigers » Sat Jun 09, 2018 7:32 pm

Got another project a few weeks back, a Z1b that was a none runner. Its in pretty good nick really, original dated wheels, switches, swinging arm etc.
The tank is super clean to say its been stood. I bought it really for when the crappy weather comes, but i got a bit carried away with myself the other day, you know how it is, one bolt leads to another and so on.
The engine is in fine fettle. No broken studs or fins that i can see. Anyway this were i am at the moment.
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PAULJAC47
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Re: Z1B Restoration

#2 PostAuthor: PAULJAC47 » Sat Jun 09, 2018 7:40 pm

Great basis!
PAULJAC47,,,,,"She may not look like much, but she's got it where it counts, kid."
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Re: Z1B Restoration

#3 PostAuthor: chrisw1 » Sat Jun 09, 2018 7:56 pm

getting harder to find like that ......looking forward to the thread

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Savage
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Re: Z1B Restoration

#4 PostAuthor: Savage » Tue Jun 12, 2018 12:22 am

A real time machine
1121

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ZedHead
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Re: Z1B Restoration

#5 PostAuthor: ZedHead » Tue Jun 12, 2018 6:03 am

Good luck with the project :up :pop

Wrigers
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Re: Z1B Restoration

#6 PostAuthor: Wrigers » Sun Jun 17, 2018 7:42 pm

Started to strip the engine down this weekend, no major issues, no awkward bolts etc.
The gears look fine, but when the crank was removed i noticed some damage around one of the locating pins.
I had the same on my A4 engine although not quit as bad. It was exactly the same pin, the one directly inline with clutch drive gear.
I'm guessing that this is the one with the most stress on it with the engine under load??. In time its enlarged the hole and the pin just fell out.
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Philippe
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Re: Z1B Restoration

#7 PostAuthor: Philippe » Mon Jun 18, 2018 3:37 am

Hi Wrigers
bad news, very bad news...but it can be solved.
The cracks can be welded but it will have to be done by a real craftsman who has the correct equipment and a lot of skills. I've been reading about it on the German forum where the same thing happened and it could be repaired.
They wrote that the cracks where enlarged with a dremel tool, laser welded and that afterwards the welds were cleaned. Afterwards the cranckcase was machined on a lathe and a new location pin installed.
I hope you can find the correct people to repair the damage. A few years ago the costs were about 350 Euro...
Good luck, I hope you can solve it.
Philippe
the differences between a little boy and an adult man is the price and size of their toys!

Wrigers
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Re: Z1B Restoration

#8 PostAuthor: Wrigers » Mon Jun 18, 2018 4:52 pm

Thanks Philippe, im in no rush, holiday next then I'll do some enquiries and take it from there.
Still not sure why it only happenes on that pin though.

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Re: Z1B Restoration

#9 PostAuthor: Philippe » Tue Jun 19, 2018 3:06 am

Hi Wrigers
it's one of the few weak points of the "bulletproof" engine...
The problem seems to be that only that pin limits, prevents, the movement from left to right of the cranckshaft. The problem starts with the pin becoming loose. When the pin isn't corrected and tightened the pressure on the cranckcase becomes higher and ultimately the aluminum starts to crack...
I have my information from the German forum, so don't crucify me if someone else knows another (better) reason...
GrtZ
Philippe
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needaz1100r
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Re: Z1B Restoration

#10 PostAuthor: needaz1100r » Tue Jun 19, 2018 10:29 am

I'd be grinding the case out where the cracks are until all the aluminium is gone well below where the cracks are.

Then a good welder can build it back up, without trying to get into cracks or crevises, or welding with trapped oil (oh how welders moan about trapped oil!!!) and you know any pre-stressed material is removed.

I'm sure Phillipe meant similar, but trying to actually weld the cracks would be chasing your tail I think.

Then, your machinist is working in brand new aluminium.

I know people who can do this if you are stuck.
Cheers,

Mark.

Wrigers
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Re: Z1B Restoration

#11 PostAuthor: Wrigers » Tue Jun 19, 2018 1:23 pm

Thanks Mark.
I'm on my jollies next week, so I'll pick up were I left off when I come back. I might pm you then. Paul

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Re: Z1B Restoration

#12 PostAuthor: needaz1100r » Wed Jun 20, 2018 7:09 pm

Wrigers wrote:Thanks Mark.
I'm on my jollies next week, so I'll pick up were I left off when I come back. I might pm you then. Paul


You're welcome, it would be an interesting little project.

Enjoy your hols.
Cheers,



Mark.

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Re: Z1B Restoration

#13 PostAuthor: 8 Valve Mark » Wed Jun 20, 2018 10:52 pm

I'd recommend a call to dave at buzzworkz(07930-847648)to repair and probably explain the root of the problem too..club member too so you might get a good deal too. fingers crossed... mark

Wrigers
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Re: Z1B Restoration

#14 PostAuthor: Wrigers » Thu Jun 21, 2018 6:01 pm

Yes Buzzard my head build on the A4. Did a sterling job and a nice fella.


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