Rockitdoc
Hero member
- Location
- Fort Collins, Colorado
Should there be ridges cut into the center cam bearing top cap, intake cam?
Cam seems fine.
Cam seems fine.
RGS1000SFC Center Cam Bearing Cap
- Thread starter Rockitdoc
- Start date
No.
The cap caters for all types of Laverda cam locating methods. Early models have a half-moon that sits in a groove in the cam journal and in the cap. Early 120? models have the cam located by thrust faces either side of the cap. Later 120s had a bronze insert in the cap for the cam thrust face to bear on.
piet
The cap caters for all types of Laverda cam locating methods. Early models have a half-moon that sits in a groove in the cam journal and in the cap. Early 120? models have the cam located by thrust faces either side of the cap. Later 120s had a bronze insert in the cap for the cam thrust face to bear on.
piet
Rockitdoc
Hero member
- Location
- Fort Collins, Colorado
I ordered another cap.
Also, the attached spreadsheet is the result of my shim and bucket shimmy I did today. Very interesting work. Fun, really. I also found that scored bearing cap.
Anyway, I'd appreciate it if you guys could check my arithmetic and let me know if you concur that the yellow shaded shims need to be replaced by the ones shown.
Also, the attached spreadsheet is the result of my shim and bucket shimmy I did today. Very interesting work. Fun, really. I also found that scored bearing cap.
Anyway, I'd appreciate it if you guys could check my arithmetic and let me know if you concur that the yellow shaded shims need to be replaced by the ones shown.
Dellortoman
Hero member
- Location
- Tasmania, Australia
I'm not sure you can simply fit another bearing cap to the lower half of the bearing.
The upper and lower halves would be bored as an assembly and therefore be a matching pair. If you swap half of the bearing, the new half would probably have been made on a different machine years apart from the first one, so it may not be perfectly aligned with the other half and you could end up with a tight camshaft.
What's wrong with the bearing cap in the photo anyway? It looks quite normal to me. I've never seen one that doesn't have some slight scoring (rubbish oil filtration in Laverdas). But if the cap is scored beyond tolerance, then the bottom half will be too.
You could buy the whole middle (split) bearing, but then it might not be exactly the same height as the end bearings, and will pull a slight bend into the shaft, again resulting in a tight shaft.
If I had a buggered half bearing, I reckon I'd replace all 3 bearings. I'd get them from Red too. He has billet cam bearing blocks that are better than the originals. Come to think of it, I'd probably replace the 3 on the other shaft while I was at it.
But what would I know? I'm not a mechanic. It'll be interesting to hear what the real mechanics have to say.
Cam
The upper and lower halves would be bored as an assembly and therefore be a matching pair. If you swap half of the bearing, the new half would probably have been made on a different machine years apart from the first one, so it may not be perfectly aligned with the other half and you could end up with a tight camshaft.
What's wrong with the bearing cap in the photo anyway? It looks quite normal to me. I've never seen one that doesn't have some slight scoring (rubbish oil filtration in Laverdas). But if the cap is scored beyond tolerance, then the bottom half will be too.
You could buy the whole middle (split) bearing, but then it might not be exactly the same height as the end bearings, and will pull a slight bend into the shaft, again resulting in a tight shaft.
If I had a buggered half bearing, I reckon I'd replace all 3 bearings. I'd get them from Red too. He has billet cam bearing blocks that are better than the originals. Come to think of it, I'd probably replace the 3 on the other shaft while I was at it.
But what would I know? I'm not a mechanic. It'll be interesting to hear what the real mechanics have to say.
Cam
Cam,
You're getting very close to being classified a mechanic...
Cap should not be replaced individually. Made as a matched pair with its' mate, should also go in the scrap as a pair. A big box of spares would be required to find a cap that exactly matches the lower
Don't see much wrong with it either, only cosmetics. If the cam is good, it can't be worn that much.
piet
You're getting very close to being classified a mechanic...
Cap should not be replaced individually. Made as a matched pair with its' mate, should also go in the scrap as a pair. A big box of spares would be required to find a cap that exactly matches the lower
Don't see much wrong with it either, only cosmetics. If the cam is good, it can't be worn that much.
piet