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Messages - Sigean

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1
Engine and Transmission / Re: splitting crankcases
« on: July 21, 2025, 04:47:23 pm »
But there is more!!  I discovered that I had in my box of taps and dies an imperial tap (1/2" UNF, I think) which would cut a useable thread in the crankcase mounting holes.  I did this in the top of the four holes which had the crankcase locating dowels at the joint end, and then made up screwed plugs for these, two of which being threaded 6mm to take a couple of lengths of 6mm studding.  Voila! I now have the means to "jack" open the crankcase halves any time I want to!

Of course, in my case the discovery of the UNF tap was fortuitous, and a 12mm tap or similar size would do the same job, but the internal threading of the outer holes (only by 10mm deep) will do no harm to the cases and I now have an elegant means to open the cases in the future!

Why Moto Guzzi didn't provide jacking points or levering lugs in the first place is a mystery to me...

Sigean

2
Parts and Service / Engine parts for Nuovo Falcone?
« on: July 14, 2025, 10:10:19 am »
Hi,

I am about to renovate my Nuovo Falcone's cylinder head and would welcome any recommendations for parts suppliers.  I need new valves, guides, springs, etc. and am thinking of going "lightweight" in this regard, having witnessed firsthand the destructive power of the standard valves when the head lets go of the stem...  A new piston set and rebore will also be necessary.

Experiences of purchases or advice regarding European suppliers (I live in the UK) would be helpful.  The only supplier I have used in the past has been Uwe Pirner.

Kind regards,

Sigean

3
Parts and Service / Oversize piston?
« on: June 24, 2025, 10:27:03 am »
Ciou Falconisti,

Can anyone recomend suppliers of oversize (or even standard) pistons for the Nuovo Falcone? 

I need one for my engine rebuild here in the UK.  The original was holed by a dropped valve.  The cylinder bore looks OK (but I need to check) and a standard size replacement might work, but a rebore won't do any harm, so I am looking for an oversized piston.  Any advice welcome...

Sigean

4
Engine and Transmission / Re: Falcone engine overhaul - post valve breakage...
« on: May 30, 2025, 08:42:56 am »
Dear Banquo,

I  think we might have had a few exchanges on this Forum or others (ADV Rider?) in the distant past, and thanks for the comments.

Could you tell me from whom you bought the new valves?  Might it have been Pirner - they seem to get lots of mentions in this regard.  Reports from users of the lighter valves are varied, but I feel there is a rightness in losing some of the weight of the original system.  I just don't want to have to undertake again the repair and reclamation work on which I have now embarked...

Sigean
(Peter Newton from East Devon)

5
Engine and Transmission / Re: splitting crankcases
« on: May 29, 2025, 03:01:27 pm »
....and advice not needed.  It took a long time, but heat and verrrry gentle leverage were my friends.  One of the location dowels was somewhat corroded and this caused the problem.  Now to check the internals!

Sigean

6
Engine and Transmission / Re: splitting crankcases
« on: May 28, 2025, 05:22:19 pm »
Hi,

I am having exactly the same problem with my own Falcone's crankcases - stuck firm!  How did you get yours apart in the end?

Any advice welcome...

Sigean

7
Engine and Transmission / Falcone engine overhaul - post valve breakage...
« on: May 27, 2025, 01:07:12 pm »
Ciou Falconisti

It's been a long time since I posted on this site.  I have been putting off engaging with the cold reality of my broken Falcone.  It was about 7 years ago when I was riding the Falcone back to the UK from southern France when disaster struck.  On a glorious summer morning, perhaps proceeding at a little more than the posted speed limit down an empty road near Moulins, the engine went "BANG" and I coasted to a stop by the side of the road.  The exhaust valve head had become bored with its attachment to its stem and had formed a permanent relationship with the piston.  It rather spoiled my day.  Hey ho, life is tough and then you die...

So, after all this time the engine is out of the frame and I can now survey the extent of the damage.  This initial examination reveals that the piston is shot, the combustion chamber is scarred (those scars now repaired by a friendly welder, but needs new guides, valve seats, etc.), and the connecting rod is slightly twisted.  I haven't been able to check the flywheel yet, that's the next job.

I will buy a new piston (any recommendations?) and have the (undamaged) cylinder rebored to suit, but I will need a replacement con-rod.  Might any Falconisti out there have one I could purchase?  And when renewing the valves, can anyone advise on replacement valve options?  I know there is a school of thought regarding the advantages of using lighter valvegear, and I am attracted to this: can anyone recommend any of the options available?

Finally - the internal crancase bolt...  Mine is super tight.  Apart from applying heat to the aluminium into which it screws, are there any other removal techniques that have proven successful?

Any thoughts welcome.  It's been a long time and it's good to be back!

Sigean

8
Engine and Transmission / Re: Banquo's Mighty Falcone top end rebuild
« on: July 12, 2018, 05:54:56 pm »
Hi,

Great article about the Falcone's renovation.  I particularly liked the new oil feel design - very neat!

I don't think I have input to this forum since my return from France a couple of summers ago on my Falcone, when its engine dropped an exhaust valve.  A sad end to a 5000 mile trip through France, Italy and Austria......  I have left the bike in the shed whilst pondering its fate, and during the intervening time have bought a couple of modern bikes, a Honda XR400 and a CCM 404E.  The Honda has provided a significant distraction, not least from its fantastic performance and great fuel consumption and is with me in southern France right now, but it seems to burn oil like a two-stroke, and after only 10k miles(!) - must look at that after my return to the UK.  The CCM is still in the workshop, its charms yet to be revealed.

But your article has me thinking that an engine overhaul might be the best way forward for the Falcone, and a power upgrade by having the head welded as I have seen in some other parts of this forum.  Much food for thought, and I hope you will not mind if I am in touch through these pages for specific points to be cleared up as they arise.

9
The Paul Friday Resources! / Re: Tools for Nuovo Falcone?
« on: December 14, 2016, 02:02:05 pm »
I thought it might not have worked..... bugger.  But here (I hope) is the photo.

By the way, the tool simply fits over the flywheel periphery and the two bolts are tightened to secure (works well - no slippage at all), the tool also being secured to the footrest bolt or similar - the pivited linkage allows a little freedom for this location feature to find its best position.


10
Recycled Topics / Re: Tools for Nuovo Falcone?
« on: December 14, 2016, 01:49:35 pm »
I thought it might not have worked..... bugger.  But here (I hope) is the photo.[/URL][/img]

Sigean

11
The Paul Friday Resources! / Re: Tools for Nuovo Falcone?
« on: December 14, 2016, 09:35:17 am »
You are correct, especially whe it comes to loosening the nuts (and I do use an impact wrench)!  But for tightening the screws/nuts on re-assembly I prefer to do this by hand and in some cases with a torque wrench, as the impact wrench can be a little brutal at times.  And for these occasions giving the correct support to react the forces applied is the safest way to proceed.  And as I mentioned earlier, there is nothing like having the correct tool for the job.  But I do make my own, and the photo shows my flywheel locking tool.  The steel band  is clamped securely around the flywheel rim and the small steel plates allow the device to be attached to a convenient bolt on the frame - such as the footrest bolt.  Works like a charm!

12
The Paul Friday Resources! / Re: Tools for Nuovo Falcone?
« on: December 13, 2016, 11:57:24 pm »
Many thanks - the tools I have needed thus far I have made and they work well.  But those that are needed for clamping or blocking the engine to loosen or tighten the internal fastenings are the most important and these are often difficult to make...... and hard to obtain!   But my deep engine strip will not take place until the new year, so time to think about what might be needed and to get creative.

Kind regards,

Sigean

13
The Paul Friday Resources! / Re: Tools for Nuovo Falcone?
« on: December 05, 2016, 10:08:24 pm »
Many thanks for this and you are right - most tools I have needed I have been able to make.  But old age makes me lazy, and there is a real satisfaction from using the right tool for the job!  I will be in touch should I need more advice......  the work on the engine should begin early next year!

Sigean

14
The Paul Friday Resources! / Tools for Nuovo Falcone?
« on: December 05, 2016, 10:42:07 am »
Hi,

Does anyone have advice on the best places to obtain any of the special workshop tools for a Nuovo Falcone? 

I have made some (cranked spanner for the cyl. head nuts, sockets for the flywheel nuts, etc.)  to assist my limited engine work thus far, but a recent broken valve (and all the associated collateral damage) necessitates a MUCH deeper engine strip, and even some of the right tools will save potential damage and time. 

Any advice welcomed!

Sigean

15
The Paul Friday Resources! / Re: The ideal head job
« on: November 17, 2016, 01:51:52 pm »
Many thanks for this.  I guessed the piston would be standard and I need to find one to replace the one with the big hole in it.  But this will have to wait as I need to "clear the decks" of other on-going projects (not least a Condor engine rebuild) before tackling the mighty Moto Guzzi. 

Kind regards,

Peter

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