Author Topic: Laverda 750 SF clutch  (Read 1147 times)

Offline Cyriel

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Laverda 750 SF clutch
« on: November 01, 2019, 06:52 »
I`m looking for a Laverda 750 SF clutch center and a pressure plate, only later model. Hopes someone can help me out. Thanks in advance

Offline Paul Marx

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Re: Laverda 750 SF clutch
« Reply #1 on: November 01, 2019, 13:03 »
I have all you need in several examples.

Paul

Offline Laverda SF

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Re: Laverda 750 SF clutch
« Reply #2 on: November 02, 2019, 22:54 »
One of the main problems with the Breganzie 750 clutch are the stand off pilings using 10mm bolts to contain the plates - DO NOT over torque and stripe the threads when stacking the plates. The bolts torque specs are only about 15 inch pounds (Check the specs). Clean threads and use blue thread Lock.
« Last Edit: November 05, 2019, 22:34 by Laverda SF »

Offline Paul Marx

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Re: Laverda 750 SF clutch
« Reply #3 on: November 03, 2019, 04:41 »
One of the main problems with the Breganzie 750 clutch are the stand off pilings using 10mm bolts to contain the plates - DO NOT over torque and stripe the threads when stacking the plates. The bolts torque specs are only about 20 inch pounds. Clean threads and use blue thread Lock.

Unless you have an earlier peg type clutch.

Paul

Offline Dellortoman

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Re: Laverda 750 SF clutch
« Reply #4 on: November 03, 2019, 05:23 »
One of the main problems with the Breganzie 750 clutch are the stand off pilings using 10mm bolts to contain the plates 

I presume you mean bolts with a 10mm hex head (that would be M6 thread), not M10 bolts. There's not much metal in those little cush drive posts. If you drill and tap them to M10 there would be nothing left of them. The rivet hole is a bit larger than the 5mm tapping diameter for M6 so you don't get a full height thread profile. Some folks recommend going to M7. I did mine with M6. I don't recall whether I used Loctite (probably did) and it's still holding together 10 years later.
« Last Edit: November 03, 2019, 22:19 by Dellortoman »
Location: Tasmania, Approx 4253S 14723E

Offline Cyriel

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Re: Laverda 750 SF clutch
« Reply #5 on: November 03, 2019, 08:27 »
Found one here in The Netherlands. Thanks for helping.

Offline Laverda SF

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Re: Laverda 750 SF clutch
« Reply #6 on: November 05, 2019, 22:25 »
Quote
I presume you mean bolts with a 10mm hex head (that would be M6 thread)

Dellorto: I was working from memory - Too say the least at M6 thread is a very weak stanchion for packing the clutch plates - Its works but be extremely careful - If you screw it up could mean replacing the clutch hub. Which probably is why Cyriel is looking for one  ;o)
« Last Edit: November 05, 2019, 22:31 by Laverda SF »

Offline Dellortoman

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Re: Laverda 750 SF clutch
« Reply #7 on: November 05, 2019, 23:19 »
Now I'm confused.
The bolts that used to retain the clutch plates and springs are M6 as standard from the factory - 6 of them. They work fine so no need to mess about with them.
I thought the bolts you were talking about were the ones installed after drilling out the 8 rivets that hold the cush drive together. Once the rivets are removed, you have to tap the holes to accept bolts. Usual practice is M6 or M7.
Location: Tasmania, Approx 4253S 14723E

Offline Laverda SF

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Re: Laverda 750 SF clutch
« Reply #8 on: November 06, 2019, 03:48 »
Dellortoman: No rivets I know of other then on the fiber disks within the clutch pack and if worn that loose the fiber disks should be replaced. If the missing a metal disk get a new one an buff it before installing.

Just a Note: You should wash all your fibers disks with lacquer thinner, bake in your wife's oven and scrub with 120 grit before installing - Would not hurt to wipe the Metal Disks with 220 grit before assembly ;o)
« Last Edit: November 06, 2019, 04:33 by Laverda SF »

Offline Piranha Brother 2

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Re: Laverda 750 SF clutch
« Reply #9 on: November 06, 2019, 12:46 »
Ron, he means the rivets he factory used to hold the steel retaining plate (that covers the cush rubbers) onto the clutch drum. When replacing the cush rubbers owners usually tap threads into the holes where the rivets were and use M6 bolts instead.

Speaking of M6 bolts, I found a short Laverda branded M6 on my original rear mudguard today! Now I have two - a shock bolt and this one. Maybe my bike had a lot more and I never noticed before - or didn't care, and tossed them when they weren't shiny any more  :o
What ... leave it standard??!!

Offline motoddrob

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Re: Laverda 750 SF clutch
« Reply #10 on: November 07, 2019, 00:33 »
My SF2 came with Laverda branded bolts. Still have the 2 top shock mount bolts and replated so they will end up on the SFC.
Motodd 1200, SFC750

Offline Paul Marx

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Re: Laverda 750 SF clutch
« Reply #11 on: November 07, 2019, 07:55 »
My SF2 came with Laverda branded bolts. Still have the 2 top shock mount bolts and replated so they will end up on the SFC.

Beware, the value of your SFC will plummet.

Not original.

Paul

Offline motoddrob

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Re: Laverda 750 SF clutch
« Reply #12 on: November 07, 2019, 09:22 »
It's worth nothing if you don't sell it. Don't need the money........................... yet!!
Motodd 1200, SFC750

Offline Piranha Brother 2

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Re: Laverda 750 SF clutch
« Reply #13 on: November 07, 2019, 09:56 »
The Laverda branded bolts are the coolest thing! I'd have 'em everywhere if I could.

Eventually we'll be able to fit electric motors inside our old bangers - once fossil fuels are outlawed. Maybe they'll have speakers that play recordings of ASA approved silencers  :laugh: :laugh: :laugh:  I shouldn't laugh  :(
What ... leave it standard??!!

Offline Laverda SF

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Re: Laverda 750 SF clutch
« Reply #14 on: November 09, 2019, 08:41 »
Holy Crap - Just prevent your clutch from slipping, rattling and you can't get into 1st gear from neutral ;o)