Laverda primary drives.. just for my education

Gerald said:
A German SFC750 owner treated his primary drive to a triplex chain (don't know which manufacturer) after running 2 single chains for a long time. Apparently since the center sprockets hadn't been used as much as the outer sprockets the wear was uneven and caused the triplex chain to break at high revolutions. The damage the snapped chain did was significant!

Would a modern chain like Andy sells be bullet proof and cope with the uneven sprockets?

Regards,
Gerald
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Gerald just what Stevio told me last weekend disaster awaits  also used these three rows up before going onto two teeth.

Lemon
 
andrew_uk said:
At the risk of opening up the can further... is there much difference in strength between 2 and 3?  

I'm all sorted here.... with the kind help of forum members, so I have Andy's new chains in place and new cush rubbers and cleaned plates and a new gasket  :)  Thank you all.  It was just curiosity.. I saw that the manual showed 2 chains so I knew it was the original build.
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According to my table of chain specs, 2 single chains are just as strong as a triplex, given the materials and individual dimensions (plate thickness, pin diameter, etc) are the same.

The transition to 2 single chains was made because of noise emissions, as was the new primary cover and clutch set-up introduced just prior.  I do reckon the Lav engineers knew what they were doing.....

piet
 
Piet is right 2 singles are good, but best check the pin dia both Regina and iwis do a "big" pin chain and these are far better than a standard.

Andy
 
lemonjelly said:
Gerald just what Stevio told me last weekend disaster awaits  also used these three rows up before going onto two teeth.

Lemon
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BTW: how is he? Can't you convince him to return to this forum? I think time has passed, things have changed and I he always sounded like a great bloke contributing a lot to this forum. Anyone with direct contact to him: please can you talk to him?

thanks

Lothar
 
Hello Lothar
I saw him a few weeks ago he is fine doin what he knows best fixin Laverda motorcycles sometimes until the early wee hours to help someone along there way !
He has had a problem with his internet at his unit and hasn't had it since shortly after he lasted posted on the msn site. One day he'll get it sorted and some will welcome his straight talkin tell it how he sees it way  .
Regards
Tetley


 
  am no engineer (but hey, if I were I  would be trying to give definitive advice on the blessed oil filter issue on which we seem to have no definitive solution ;) , but I don't like chains instinctively.They snap, are noisy  etc. Bought a Yam XT250 back in the day rather than an XL purely because the latter had a chain rather than gear driven balancer. Bought a VFR with nice gear driven cams. No bother with either.
So, making the best of a bad job on the Jota, Keith has fitted the "Merc Duplex" for me in place of the Triplex.Must be less weight and I hope quieter. I will report back once the man in the van arrives from Glasgow :D No way would I want 2 chains in there rather than 1, though, I don't care what the reasons given..
Am told, btw, that my Audi A6 Avant has a cam chain which they have switched to from belts...bleedin engineers, eh, can't make their minds up it seems, cant they stick gears in like my old VFR had?
Nick7
 
Don't think Andy actually makes the chains.......

Wind the adjuster screw in untill resistance is felt then back it out one and a half turns.


    Keith.
 
incidentally, I think the current VFR has gone to chain driven cams...barking, but no doubt cheaper..
Nick7
 
I thought he had to set the length?Keith by resistance do you mean just as the shoe touchs the chain and starts to take the slop out,or as it gets quite tight?I expect its the first but nice to be sure.How are you going with the cams?
Vince
 
I just adjust the length, so if anywants to go to a Merc dealer and ask for a deisel cam chain they are more than welcome.........have fun trying to break the stuff and take large amount of money :D :D :D :D :D :D
 
Hi Vince, cams ready I will PM you later tonight.

The adjuster screw should be turned until the shoe is felt to just take up the slack and pull the top row of the chain tight......Or, get a smooth handled stubby screwdriver and cover your fingers liberally with oil (20W50 is fine) hold the screwdriver lightly twixt thumb and forefingers and turn the adjuster until your fingers slip.. :D

  Keith.
 
Andy i use DID 520 O ring endurance chain on both Jota and Backer , same type of chain that was used on Suzuki GSXR1000 2007-2009 and all other new 1000ccm bikes use it to , by guy who was Croatian and Alpe Adria champ. It lasted all season without any problem .
This DID chains are known around here as best that money can buy , do you agree with that .
 
Tetley Laverda said:
Hello Lothar
I saw him a few weeks ago he is fine doin what he knows best fixin Laverda motorcycles sometimes until the early wee hours to help someone along there way !
He has had a problem with his internet at his unit and hasn't had it since shortly after he lasted posted on the msn site. One day he'll get it sorted and some will welcome his straight talkin tell it how he sees it way  .
Regards
Tetley
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Lothar yes met him first time had a great time and left the workshop at 04.15am! , hows that for dedication to bikes,cam chain and shim checks,primary,fitted Witt,oil,serviced and tuned carbs shes a new bike.

Shaun

 
nick7 said:
  Am told, btw, that my Audi A6 Avant has a cam chain which they have switched to from belts...bleedin engineers, eh, can't make their minds up it seems, cant they stick gears in like my old VFR had?
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Nick,

Other major car manufacturers have also switched from belts to chains..... Ford and Mazda for example.

Others, like Mercedes, never bothered with belts in the first place.... :D

I think chain technology has developed, so smaller, lighter chains that are reliable and offer an extremely long service life have become standard issue.  Mercedes cam chains for their petrol engines have become smaller and smaller over the past 10-20 years.  Where they previously installed a duplex, a simplex is now quite ample.  And quite often they don't even state a renewal interval!

It's all about keeping production costs down and satisfying the customers.  A chain and its' sprockets are surely not much more expensive to produce than toothed belts and the associated pulleys.  Add to that, usually 2 camshaft oil seals can be omitted, further reducung production complexity.  The customer is no longer required to have the belt renewed in regular intervals, cars do a higher mileage today in their lifespan than 20 years ago, and the engine compartment is stuffed to the brim, making the simple job of renewing the timing belt a job that can no longer be tackled by Joe Average!  These are costs that the car owner no longer needs to consider.... of course there are other costs to take their place, the manufacturers and dealers always manage to make their cut at our expense.

Gears, on the other hand, are probably the most expensive form of timing drive, wouldn't be many inclined to shell out a lot extra for such luxury.

piet
 
Romeo.D said:
Andy i use DID 520 O ring endurance chain on both Jota and Backer , same type of chain that was used on Suzuki GSXR1000 2007-2009 and all other new 1000ccm bikes use it to , by guy who was Croatian and Alpe Adria champ. It lasted all season without any problem .
This DID chains are known around here as best that money can buy , do you agree with that .
Click to expand...

Heh Romeo

I also run a 520 on the Laverda, using an EK520 MVXZ chain (X ring gold...again) and various rear Talon sprockets. I've found the aluminium sprockets wear fastest, followed by the front and then the chain. Given the prices, I have no complaints, in reality a 530 would last a lot longer (I had that on the 1st year and its still serviceable), because the teeth have a much greater % wear surface (right Andy) ? but it works for me, I Like these components, they are extremely light and well made and as far as the sprockets are concerned, really low cost.

I havent weighed the sprocket but its probably about 25% weight of the 630 in steel or less, not so good on a long distance tourer perhaps.

Rob
 
lemonjelly said:
Tetley Laverda said:
Hello Lothar
I saw him a few weeks ago he is fine doin what he knows best fixin Laverda motorcycles sometimes until the early wee hours to help someone along there way !
He has had a problem with his internet at his unit and hasn't had it since shortly after he lasted posted on the msn site. One day he'll get it sorted and some will welcome his straight talkin tell it how he sees it way  .
Regards
Tetley
Click to expand...

Lothar yes met him first time had a great time and left the workshop at 04.15am! , hows that for dedication to bikes,cam chain and shim checks,primary,fitted Witt,oil,serviced and tuned carbs shes a new bike.

Shaun
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am very pleased to hear that! Say a big hello to him when ever you talk to him, please. Felt very sorry about how it all turned out and hope he'll find his way back to us. But for sure he won't if you keep him busy until 4:30 in the morning!  >:( :D :D :D

Why didn't you fix his internet-connection while he was fixing your bike? ;)
 
Theres a thought Lothar ! will send my regards for you.

Shaun
 
Rob you are spot on but I would advice purely on a price basis the use of standard O ring. The shape of the seal makes very little difference in wear on a road bike but the x and w rings go up in price.

Try a 530 non O ring iwis from whatever source and at ?36 or there abouts you might get a pleasant surprise. I run a standard chain on my Bandit, app 120+ bhp, with no probs even at stupid speeds. Tho I do admit when I go over the water I do fit an O ring for ease of maintainance.

Andy

PS there are other users of the non O ring product on the forum and perhaps you should ask them :D :D :D :D
 
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