Re: What did you do to or for or with your Laverda today?

Took the 3CL out for a ride today and got pulled over by the cops with a scooter :o and 2 KTM's.
Female cop inspected the 3CL and found everything on the bike road legal ( if only she knew..). Carried on and stopped at a Renault dealership that has had a Fiat Dino sitting in a show room for years. One of the few cages that appeal to me.
 

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Nice collection Grant ,wish I had the space you have,I literally work in a shed most the time it's only 10'x18' ,I do borrow some space in my brothers shop,you definitely have some projects going,  Cheers
 
chrisk said:
Read this about it: https://www.throttleroll.com/chris-laverda-1972-750sf/
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When's the next chapter being published??!! There's some of the story missing!

I actually managed to get back into my project the last few days. Removed my 320mm disc adaptors (with outboard 22mm bearings built in) and skimmed them on a face plate - discs weren't running dead true, now all sorted.
Set up the 270 deg cam wheel and flanges for bike #2.
Looking for a 30 ton press to get the SFC crank back together before sending to Qld for balancing.
Also looking for anywhere local that can bend pipe for my twin sys SFC style centrestands.
Sourced a pair of Yoshi stainless 'mufflers' (large bores, straight through) off Gumtree that look like they'll do the job on my custom twin sys nicely.
Also found a pair of slightly tattered Staintunes for $99 that might suit less modified bike #2. if the Yoshi sys sings in comparison, I'll look at finding a second pair and offload the Stain-s.

About 3 deg down here in Melbourne, might brave another late night in the garage ...
 
Dellortoman said:
How about Greg Parrish?
Or if it's going to Queensland for balancing anyway, why not get Red to assemble it?
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Do all my own crank work - and just about everything else. Greg kindly let me use the one down at DAM and Ian D's to dismantle it and can hopefully call on them again, but it's a 2 hour drive/ride there and back. I had access to one 5 minutes from home, tis all.

Red will be involved in the balancing bit. I so want a 30 tonner in the garage but only need them rarely.

Still struggling to get my 320mm Brembo discs to run straight on my painstakingly machined adaptor/outboard hub-bearing flanges. Everything is running true in the lathe, but when I bolt the adaptors to the Lav hub and fit the semi-floating rotors I get .4mm runout. Pretty sure the rotors are straight, but that's my next stop ... that and the mounting face on the SF2 hub.
 
Piranha Brother 2 said:
Still struggling to get my 320mm Brembo discs to run straight on my painstakingly machined adaptor/outboard hub-bearing flanges. Everything is running true in the lathe, but when I bolt the adaptors to the Lav hub and fit the semi-floating rotors I get .4mm runout. Pretty sure the rotors are straight, but that's my next stop ... that and the mounting face on the SF2 hub.
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Paint or powdercoat on the hub?
 
found this points set up lurking inside a 500 engine yesterday
is actually fairly well done but we need to twist this engine to 270 degrees so points will be replaced by a custom trigger board

 
Davo said:
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Paint or powdercoat on the hub?
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Original finish, no contaminants - 280mm Brembos always ran true on this wheel. I'm going to fit the adaptors to my new CNC billet hub (bare, no rim) and run it on the lathe mounted on the axle and machine the faces in situ - then I'll be positive that there is zero runout. It's only a matter of .05mm or so at the mounting faces but when you translate that to the 320mm circumference the multiplication factor comes in.

If I had a dirty great lathe I could put the entire wheel (hub and rim) in and keep it on the original hub. No drama - I think the billet hub will be stronger than the factory cast one anyways. Just that I've machined the speedo drive gear journal off (going elec) that hub and will now have to do the same to the billet. I can retro fit a journal so bike #1 can retain its cable-driven speedo. it's all just time - of which I have insufficient!

 
Piranha Brother 2 said:
Still struggling to get my 320mm Brembo discs to run straight on my painstakingly machined adaptor/outboard hub-bearing flanges. Everything is running true in the lathe, but when I bolt the adaptors to the Lav hub and fit the semi-floating rotors I get .4mm runout. Pretty sure the rotors are straight, but that's my next stop ... that and the mounting face on the SF2 hub.
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I presume your mandrel for mounting disk carriers on the lathe is true, so if your disks and carriers run true on the lathe then the problem can only be with the wheel hub.

I've found the hubs to be pretty true on the wheels for which I've made disk carriers. Perhaps your hub has been molested by some ham-fisted previous owner, possibly bashing wheel bearings out or in and damaging the inside of the bearing housing. It would only take a fraction of a mm at the bearing to throw the disk out by 0.4mm. A ridge in the bearing housing caused by crooked bearing installation or removal might be enough. I suppose the only way to be sure is to press the bearings out and inspect the bores in the hub. If the bearing bores look OK then the wheel hub might need a light skim on the disk carrier mounting faces.


Edit:
I just read your comment that the 280mm disks ran true on that hub. That throws my mangled hub theory out of the window. I'd suggest you re-check your disk carrier mandrel. When I do disk carriers, each time I put the mandrel in the lathe chuck, I check it for true with the dial gauge and if necessary give the face a light skim.
 
Piranha, If you are using the stainless Brembos with the steel centers like were installed on 90's Ducatis  most likely its in the rotors. I've got three sets of them that are junk,heavy too. EBC make a reasonably priced replacement or if you can come across a set of the cast iron full floaters you would be golden.
 
Davo said:
Looks like northern hemisphere salt  :o
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??? Nah, they don't have Redback spiders there.

Careful working on that one Red.
Those suckers hurt for days when they bite ya.
One got me on the arse 4 times, while on my ride on mower, just before I sat down to watch the 2012 Grand Final when the Swans flogged Hawthorne  :D.
I didn't make 1/4 time before I was in bed for a few days.
 
wdietz186 said:
Piranha, If you are using the stainless Brembos with the steel centers like were installed on 90's Ducatis  most likely its in the rotors. I've got three sets of them that are junk,heavy too. EBC make a reasonably priced replacement or if you can come across a set of the cast iron full floaters you would be golden.
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Hmmm - not sure which Brembos I have - but will look into that. I assumed the discs from a 916-998 series Duke would have been relatively high quality!! Won't be happy if I have to ditch them.

As for my out of true, I think I'm getting to the root of the prob and will hopefully report straight and true rotors very soon! never a spoken wheel was truer?
BTW, the 22mm bearings are mounted in the disc adaptors and interference fit into the orig Lav hub (where the bearings used to go). Gives me a very wide, strong hub that bolts straight into the OWO1 USD forks. R1 calipers bolt straight on to them as well.
 
Piranha Brother 2 said:
BTW, the 22mm bearings are mounted in the disc adaptors and interference fit into the orig Lav hub (where the bearings used to go).
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OK. That's different to the Laverda cast wheels where the bearings are in the wheel hub and the disk carriers bolt on the outside.

Your wheels sound like they're similar to Moto Guzzi wire wheels. They have the bearings in the disk adaptors too. I had to make up a set of bearing/disk carriers for a Guzzi recently. There's quite a few machining operations in the bloody things, then you have to make up the bearing spacer to go on the axle. It's a bit of a fiddle and (for me) lots of checking and re-checking arithmetic to get it so it all bolts up nicely with free-running bearings.

Good luck with the lathe operations. I'm happy if I get the disk runout to 0.1mm or less. I think the maximum runout specified in the workshop manual for the solid mounted disk rotors is 0.3mm. With floating disks you might get away with more than that because they can self-align to some degree.
 
If the rotor buttons have holes through them you can try turning them back and forth to remove the crap that builds up between the button and the carrier/rotor. The semi floating rotor blades will cock some due to the buildup and give you a pulsing when you use the brakes. You can use a bolt and nut through the hole to grip the button to turn it. If you have the solid style buttons, those are the ones that tend to warp.
 
Tried replacing a rear tyre this week, rang the shop and asked for what I needed. The young bloke went and looked and said nope it needed ordering. So 4 days later I get the text it's arrived so I pulled the wheel and dropped it off. The shop owner asked what I did too the young kid on the phone, I have no clue what he is on about. They then tell me they already have 3 of the tyres I wanted in stock, we all laugh at the young blind kid who couldn't see all these tyres. This morning just before I was heading out to get my wheel the mobile rings and it a very apologetic shop owner.Seems all 3 of the tyres we were laughing about that the kid has missed in his shop search were 17-inch rubber, and the tyre he ordered was also a 17 inch. I went right through what I wanted when I spoke to him including the tyre weight specs. To top it off this isn't the first time this 17 inch thing has happened to me doing this. I just put it down to shit happens. It's pissing down here anyway to no riding for me till the new rubber hits the road.I really cannot complain too much, they do very nice tyre fits, been using them for 30 years.
 
Opened up the shed door, half the pacific on the floor ( again maybe its time to revisit the drainage instead of working on the bikes all the time )  pull the Silver Jota out for the monthly CIMMA run as was still dirty from the last run, moved the half immersed cars out of the drive and took off, dropped into the post office, came back out and now was pissing down again so  bugger it back home............rain has now stopped so time to try to dry out the shed before the next deluge I guess.
 
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