Lav 500 - Valve joint/head lube

O

okoch

Full member
Location
Denmark
Hello

I have two questions to the council. Help, where I can get new valve joints (6mm) for my 500, and if anyone can explain the difference between the Head on a 500. I have to different heads, one without  and one with copper lube pipes on the exhaust side.

Thanks

Ole
 

Attachments

  • Lav 500 cobber lube.jpg
    Lav 500 cobber lube.jpg
    153 KB · Views: 47
  • Lav standard lube.jpg
    Lav standard lube.jpg
    161.7 KB · Views: 53
The 6mm valve seals are unique to the model, will be very difficult to find NOS.  Haven't found any generic automotive seals as a direct replacement, needed to resort using 5.5mm items from an Opel Corsa iIrc.  6mm items are usually too large to fit the 500 guides.  Guess you could fit thin tube spacers, though.

Copper pipe??  Stock 500s did not have external oil pipes, oil was transported to the head via enlarged cylinder/head stud holes.  The 600 Atlas had external piping, this was located at the rear of the cylinder and head.  600 top end will not fit on a 500 bottom end!

How about a pic?

piet
 
Koch said:
Piet

The pipes leading directly down to the oil channel in top of the cylinder like standard heads.  
Click to expand...

Oil channel?  What oil channel?  500s don't normally have an oil gallery at the top of the cylinders.... pics please!

piet
 
piet
if you look on the two pictures above ,the lower picture shows the two short stubby pipes sticking up from the casting,dont ask me coz i know nothing at all about 500s        neale
 
Iam think Jotacorsa is on to it. The pipes is the return flood of the oil. And the hight of the pipes will set the oil level in the head. I have marked red on the drawing were the pipes is leading to. Green is oil comming up to the head.
 

Attachments

  • Lav 500 lube system.jpg
    Lav 500 lube system.jpg
    53.6 KB · Views: 26
Still trying to figure out..... why?

Flooding the cam box to that height would make one smokey engine, not to mention the power loss due to excessive splash!  Might be a great deal quieter, though! :D

piet
 
I managed to have a chat with the first owner of the bike which was a mechanic at the Danish Laverda Importeur. He made ​​the change in the cylinder head due to poor lubrication as 500 struggling with. He has a reputation for being somewhat of a technical genius. Nice to get it cleared up.

Ole
 
Maybee it is the same mechanic who had my 500 head in his hand. The first owner of my bike explained me why the small screws with small hole drilled in them where screwed into the oil supply channels in head. He told me that due to the fear of insufficient lubrication of the cams, they widened the channels out which resulted in a destroyed crank  :o :o :o. The engine simply lost the oil pressure/flow to the crank and they had to close the channels back to original size.

The head was also ported (again mayby by the same mechanic since the first owned bought the bike by the importer and he lived in the area) and I haven't had any problems with the head (the bike's  :D) in my ownership with 20.000 km done, now close to 85.000 on the clock if it can be trusted...
Arne
 
You must log in or register to reply here.
Back
Top