Help Needed Please - On road - Maybe Stranded

PMA Paul that"s the ticket, engine out job and all ill be fine , 750"s are versatile and the biz!  (bigthumb)
 
A great tale and not over yet...ironicaaly I reckon you will end up having a better time than if all had gone to plan...you get out what you put in and all that...hey maybe the time to read Zen and the cart of..? Author died of late as you know..Have a fab holiday
 
Thanks for encouragement chaps. Have to say I'm having a great time. Currently zooming towards Paris Sur la train.

If anyone has bad luck like me, then I can collect your bike from breganze on or around 20th July. Spare space on trailer and spare seats in car. Back to UK, direct to Calais Dover crossing. Lichfield terminus.
 
Reckon the Brits owe Riccardo big time. I know Doc! and the old duffer have benefited from his services this year... there may be more! Glad you're able to maintain a sense of humour Paul. Seems to be an essential part of Laverda ownership.
 
The story unfolds.... I'm writing this from cafe centrale in Breganze, which I'm pleased about, even though I'm 2 days late for the action.

My bike came here from the unscheduled 'stop' in central France on my trailer, over 2 days. No worries, even came over the Col De Mont Cenis, which I love.

On the way I thought to myself, I'm going to try everything I can to ride this bike on the streets if its hometown, so took it straight to Oro's.

We took it apart this pm and here is what was found...
- 3 x M6 stud/nuts were nowhere near tight enough. But basically in place. Not unwound.
_ key shared.
_ end of 1 cam completely fucked. To be thrown away. Keyway area chunked away.
- 1 cam bearing cage (pressing) falling apart.
Overall, no mass destruction.


The M6 (flange) nuts had cheap and nasty star washers underneath them.  I suspect this is the root cause of all the issues.

I had a good look at the end of the cam and could not see any typical fatigue crack progression or spiraling torsion cracking. Very unusual patterns. I even suspect a bit of welding here(?)

So, I'm determined, I FUCKING WELL WILL RIDE THIS BIKE IN BREGANZE. Hold me to it guys.

if that happens and jane is a darling, she migh drive the car and trailer half way home and I can ride the bike a while before the boring flat and straight French bit starts. I think I need to buy her something very expensive in Venice....

I'll keep you posted. 

Hag. Still happy with it all.
 
Those nasty star washers were factory fitted.  I find many of these broken, or they break up, when I disassemble heads.  The factory ones seem a bit brittle, replacements often not up to the job either.  Better to replace with the "Schnoor" type.

Wish you luck Paul!

piet
 
Interesting Piet, Giuseppe, the design engineer might have made a more robust choice there....

Despite this, taking it apart with Riccardo, I have generally, been very impressed with the engineering of a 750 (my first). Only other issue we found was a rocker face (to cam) which had worn out.

Oh by the way, the issue below allowed valves to touch pistons (via obvious timing slip) but only a gentle kiss. Not much more than carbon removal. Pistons and little ends ok. Valve face and piston pocket nicely parallel and courteous to each other.

The bike is a keeper, firmly attached now. Even though every fixing seems to have witness marks from a plumbers wrench.

The Breganze capaginlle just struck 8pm BTW. Gorgeously warm in Breganze.
 
Paul H said:
- 3 x M6 stud/nuts were nowhere near tight enough. But basically in place. Not unwound.
_ key shared.
_ end of 1 cam completely fucked. To be thrown away. Keyway area chunked away.
- 1 cam bearing cage (pressing) falling apart.
Overall, no mass destruction.


The M6 (flange) nuts had cheap and nasty star washers underneath them.  I suspect this is the root cause of all the issues.
Click to expand...

Pretty much exactly what happened on my SFC whilst racing. My cam was still okay and pistons and valves also had little love touch but otherwise good. I can't remember what we did on reassembly but it didn't involve those crap washers.

Well done! Give us the ride update when you are back up and running!
 
A worn rocker face can be caused by the centre stud blocking off the oil channel. I place a bent bit of wire there to prevent this. Surely Ricardo is aware of that. The cams are oiled principally via the rocker pins.
 
............... and so, ladeeez and gentlemen ............

Pleased to report that the Flying Bogie did (eventually!) roll it's wheels, under it's own steam, through the streets of it's home town.

Hey, OK, so I was 1 week and 4 days late for the action, but the goal was achieved. A birra, or 2, in Cafe Centrale sealed the story.
36009896686_ff370e1c66_z.jpg
 
If you buy a bike and call it 'snot' you've only yourself to blame!

Motorcycles have feelings too y'know.

Nick :-)
 
Thanks guys.

I can blame my niece and nephew for that Nick. Little buggers named it. Flying Bogie is a lot sweeter than some of the names I called it after it broke down...

I should give Riccardo Oro a big shout-out at this point. He was very accomodating, moved jobs aside for me and did a thorough job. After we took the top end down together and seeing how he worked, I gave him the carte-blanche 'while you are in there it's OK to fix it' permission and buggered off for a holiday with Jane. He thoroughly checked and replaced as he went. He kept every single part that was replaced, on my return he described to me why he had changed it and presented a detailed and reasonable bill for his time and the parts. He finished the job with a good tune, including diagnosing worn out needle jets.

We did loose a valve to the piston touch, very slightly bent, only apparent on grinding in.

I suspect the bike has done more miles on the trailer than on it's wheels during my ownership. Assume the position....
35918148031_d3ec297633_z.jpg
 
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