Something new in the shed ...

rocketonarail said:
That`s nice,was it Sulzbacher who produced/raced a `non-frame` 1200 and has it survived or did any similar make it onto the road?
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It was Franz Laimboeck who developed and raced the non-frame 1200SC with the support of Werner Sulzbacher. The bike was sold in August 1983 to a Swiss collector, where it was sitting for more than 20 years under a blanket. Cor Dees bought it in 2005. It is still part of the LAVERDA Museum, which will arise in Breganze.
First pic is Franz Laimboek with the first version of the non-frame 1200SC showing it at the LAVERDA factory in Breganze.
Second and third pic is the state of the non-frame 1200SC in the eighties and still today.
Ciao, Gert
 

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Dellortoman said:
Congratulations Gert. You got a rare beast there.
Is Sulzbacher the guy who used 4-row primary chains?
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Sulzbacher offered Morse primary chains as an option, reckon finding replacement sprockets might be a bit of a headache.

4-row roller chains were used in the works space-frame engines.

piet
 
That was an interesting watch Dave. Used a few DID chains over the years. Could have been a DID that failed on the Nullabore all those years ago.
If I can get the primary sprocket ground to 1/4" I'm keen to go with a 520 next change.
I should look to see if there is a grinding attachment to fit a lathe available for a reasonable price.
I guess the other option would be to anneal it, turn it down then re-harden the sucker.
 
Hey Rob - I made a basic alu attachment that allows me to mount my 100mm Makita angle grinder onto the tool post. It then works like a tool post grinder - slow but accurate and it eventually gets the job done - haven't done my 530 to 520 job yet but have used it for a few accurate grind jobs.

I've also got a 520 20T sprocket I'm going to anneal and remove the centre from and I'll do the same to the outer of an old 530 19T sprocket, then have them welded together. Have done this when i spaced a std 19T by 4mm for extra tyre clearance to my 160. But don't like the offset any more - too much stress on that 5th gear output shaft (that Red has the perfect solution for on the Mule).
 
sfcpiet said:
Sulzbacher offered Morse primary chains as an option, reckon finding replacement sprockets might be a bit of a headache.
piet
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In all the years that I have worked with Sulzbacher LAVERDAs, I have never seen one of these Mors primary chains on one of the Sulzbacher tuned bikes. Maybe I should ask Franz Laimboeck ...
 
sfcpiet said:
Sulzbacher offered Morse primary chains as an option, reckon finding replacement sprockets might be a bit of a headache.
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had custom made Morse sprockets made a number of years ago for the primary chain drive, still in stock
when they arrived I deemed them too heavy to be of any use, also have the Morse chain in stock
don't really see the sense in them these days now chain technology has moved on
 
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piranha-bro2 said:
I've also got a 520 20T sprocket I'm going to anneal and remove the centre from and I'll do the same to the outer of an old 530 19T sprocket, then have them welded together.
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Before I had my own lathe, I had a similar job done by an engineering shop. I took two front motorcycle sprockets in to them and asked them to take the centre out of a worn out sprocket and weld it into the other (new) sprocket. I forget the reason, it was a long time ago. I was probably cobbling together a sprocket with a non-standard number of teeth or something. Anyway, when it came back from the engineering shop, the weld looked neat enough but before fitting it to the bike, I checked it for alignment. It had about half a millimetre radial run-out and about 1mm axial run-out. Too much wobble for it to be of any use.

I took it back and showed it to the owner of the engineering business (a bloke I knew quite well). He was very embarrassed that such a shit job came out of his workshop and he asked me to leave it with him. They cut it apart again and re-welded it. It came back perfect the second time. Made me wonder how they managed to cock it up so badly the first time.
 
piranha-bro2 said:
The one and only one I've done was spot on. I've had a quick crack with a carbide tip and the un-annealed sprocket - to hot and noisy. No coolant system on my little Emco.
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Throw it in the coals of the barbie next weekend...

I've tried every method, annealing and re-hardening is by far the easiest. My lathe tool post grinder is easy to use, but it takes terribly long to remove those 3.something mm. Annealing, machining and re-hardening takes about 1/3 of the time.

piet
 
sfcpiet said:
Throw it in the coals of the barbie next weekend...

I've tried every method, annealing and re-hardening is by far the easiest. My lathe tool post grinder is easy to use, but it takes terribly long to remove those 3.something mm. Annealing, machining and re-hardening takes about 1/3 of the time.

piet
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Grazie Pietro ... I will definitely go down the 'heat the mongrels' route.
 
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