NEW STRENGTHENED LAYSHAFT

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Strummer10
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With quite a few stories of layshafts shearing has anyone any idea where I can get a 'Bona Fide' top quality one and how much and have any tests been done that anyone knows of to prove they do the job ?
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corrado
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I can only think of 3 new ones available, SIL, Casa and MB. You'd need to ask them what testing they've done.
fairspares
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has anyone ever had a layshaft shear?
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Strummer10
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two of my mates have within last 6 months......hence my concern.....Must be the torque on the kits now being passed through that thin 50 yr old shaft
Strummer10
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Cheers Corrado........I was gonna do a strip out to deal with a leaking gasket on the chaincase so wanted to invest in a strengthened layshaft whilst I have her opened up
fairspares
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ive just done a search and a topic on this came up, ive been using sil ones from af in my sprint motors for the past 5 years and in road engines and have never had layshaft issues, i can only think that there are some crap copys out there like many other lambretta parts being sold on ebay.
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Strummer10
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Hi Fairspares.........To be fair both my lammies have the original Innocenti layshafts in them at present and no actual issues noted but in the 80s I never once heard of a layshaft shearing but now it seems more common. I never personally buy anything from Ebay and would always go to a reputed dealer for all my spares
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barnsleybilly
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most plausible answer is probably metal fatigue. Given Innocenti layshafts are 42 years old at best they'd be at the end of their lives if they had a fatigue index like an aircraft.

I've used SIL with no problems and I've an MB one in now but i found that incredibly tight in the bearing.
Adam_Winstone
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Mine on the way to this year's Euro was the only one I've experience and that was a perfect condition Innocenti item.
vespanic
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My mate's snapped on his series 2 last year on IW. His was a genuine Innocenti layshaft.
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