Teeth falling out (Laverda related)

Jota Rob

Jota Rob

Hero member
Location
England
After the weekends shenanigans at Spa, I had to quit on one of the extra sessions on sunday due to a transmission noise. Today, Ive drained the oil after listening again for the noise and out popped a tooth...Doesn't look like a tooth off the new 4th gear but, next weekend beckons with FOTB at Mallory so better get on with it.

A new screen on order and some fairing repairs should see a very scruffy Laverda next week...

Rob
 
Hi Rob,
Sorry to hear things haven't gone to well at Spa.
Chris and myself are aiming to be at Mallory for around 20.00 Friday,pop round for a cider/perry or two.

See you there from the 67 boys,
Andy
 
Hi Rob,
That's bad news, you should put dzus fasteners on all your crankcase studs.  Will be interesting to hear what has failed, but possibly another gear has been damaged in one of the previous blow-ups, or did you replace the whole 'box?
Cheers
Steve B
 
Keep up that solid testing for us Rob,going where no man has gone before.Looks like your the factory test team now.
 
There is a guy in Germany (somewhere near Stuttgart) that builds custom made gearboxes. He offered me a 6-gear conversion for the Laverda (crank-case delivered to him) for 2.500? complete. Could be cheaper than to replace and replace and replace the gears that are not made for the power you are confronting them with ...  ;)

No webpage though...
 
Morning Guys, I stripped the bottom end yesterday, was quite challenging getting the engine out of the frame, since the brackets are changed at the rear and the gusseting but nice to just have to removed the lower half and not the Head etc ...

I dont know what the gear is called but it's the smallest one on the layshaft that drives 5th gear output, presumably it is driving in 1st thro 4th.The reason is most likely failed, one tooth only is becuase the main shaft was snapped again...

Reason for that, I rebushed it recently and thought I did a good job however I copied the bush that came out...The correct bush should be full length, mine stops short hence leaving an un supported length of Mainshaft spigot...  I have a spare shaft and gear but am willing to buy a gear set to replace this one,,,

Screen is on order and I hope to repair the fairing in time for next weekend too. Lothar 6 speeds sounds nice and could be used but I dont have that kind of money for the forseeable future :)

Take care y'all keep them bikes rolling !

Just to confirm, the bush should presumably run full length from the step near the seal to flush with the end of the gear ??
 
Robjota said:
I have a spare shaft and gear but am willing to buy a gear set to replace this one,,,
Click to expand...

Hi Rob,

You do like a challenge....! :D
Post up a photo of the parts you need and I'll take a look - I have recently acquired numerous boxes of 180 parts, some of which I'll need, but also some that are duplicated and are therefore available  ;)

Alan
 
CLEMTOG said:
what would you  be needing 180 parts for then Alan,
#cuuuuuummmmmmmon
beans spill etc
CLEM
Click to expand...

:D
See my signature, Monsieur Clementine! :-*
I have a new project - rolling chassis with engine, plus boxes and boxes and boxes of parts..... ;)

(and apologies to Rob for the inevitable off-topic!)
 
I just had a bit of a flash,I thought having 2 cush drives in Laverdas,1 in the rear wheel,maybe not with Suzuki  wheels and the other in the clutch was supposed to take the shock loads off the, I was going to say gearbox,change that to the drive system.That wouldn't stop braking main shafts but may help with shock loads on individual gear teeth.
 
Vince
I take some responsibility for the broken parts...

Alan, Any gear box cluster parts, , ie shafts and or gears, but a Mainshaft and the smallest gear on the end of the layshaft are the 2 items I've now depleted  :)

Thanks Rob

ps see you next weekend.. 
 
a14rgs said:
Robjota said:
I have a spare shaft and gear but am willing to buy a gear set to replace this one,,,
Click to expand...

Hi Rob,

You do like a challenge....! :D
Post up a photo of the parts you need and I'll take a look - I have recently acquired numerous boxes of 180 parts, some of which I'll need, but also some that are duplicated and are therefore available  ;)

Alan
Click to expand...

If you need a courier I will be heading to Mallory on Friday.

Scrumpy
 
Hi Scrumpy, will be good to see you there.

Just an update, bearing should be arriving today for the output shaft.
On closer inspection, the bronze bush had broken away ...the missing 10mm is where the mainshaft had snapped and a clean break, so it looks like the bush is too short but the fragments appeared yesterday.

Alan I'll get some photos, thanks.
 
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