Not the best of nights

Red,

Those piston skirt extensions look different to the Mondials I've seen on the 1000cc's.
Are they Mondials? 
If not, it would suggest that the motor has previously been worked on.
Wouldn't have expected that on such a low mileage bike.
 
tom3c75 said:
Those piston skirt extensions look different to the Mondials ,,
Click to expand...
yea, i thought the same,,  but they had Mondial on 'em.
  but it could still have had some work done to it before.

all a bit sad really.  sure makes a set of Carrillo's look dirt cheap !!
05112012140.jpg
 
tom3c75 said:
Red,
Those piston skirt extensions look different to the Mondials I've seen on the 1000cc's.
Are they Mondials?   
If not, it would suggest that the motor has previously been worked on.
Wouldn't have expected that on such a low mileage bike.
Click to expand...

Tom, pistons are standard flat top 1200 Mondial slugs, have a few of that type with the extended skirt rolling around the workshop.
They do have a longer skirt then the 1000 Mondial pistons.

Can normally tell if an engine has been apart before, copper washers on the wrong case bolts for example, wrong type of washers here and there, small tell tale signs.
This motor has had the top end off before, could tell that and I believe the engine cases have been apart as well as it had a shody sump plug repair.
Crank has never been apart though.

Looking at having the bottom end back together today.


 
Yogi bought a set of cases from Wolfgang which is lucky as these cases are smashed beyond repair
too much damage to repair properly though if you had a lot of patience they may be able to be fixed, be some work involved
plus I was surprised Wolfgang even had a spare set of Series 2 cases in the first place
 
all a bit sad really.  sure makes a set of Carrillo's look dirt cheap !!

[/quote]

Got that straight - man that is one nasty looking ker bang, crank certainly looks the biz now - hmmmmmm carrillo :)

And then there is the other Carillo -
Karla Carillo: Heir to the polished rod fortune


07-mexico.jpg






 
This thread has got me thinking (dangerous, I know  ::) ):

15 or 20 years ago a friend of mine, who has a BSA Gold Star 500, said he wouldn't start it up until he had replaced the original conrod with a Carrillo rod, as the original rods were letting go more and more frequently.  I didn't think much at the time, but seeing so many Laverda triples let go recently, does it mean that around 30 years is the lifespan of a cast iron rod?

Any thoughts guys?

Mostly curious as to what others think, as I have already decided to go the Carrillo route for the Jota (especially as it has been bored to 1115)......Still saving for Keith to fit Carrillos on the Jota crank - had about ?1000 2 weeks ago, now, since the boiler blew up and the lighting went same way, I am back down to ?200  :(  Time to stick youngest son on ebay  :D

Pete
 
Jeez, I'm afraid to start my bike now. As far as I know, it has original rods.
Click to expand...

geez..  I just got my bike running, I ain't stopping it now...    :D
 
laverlesmains said:
, I ain't stopping it now... 
Click to expand...
and if it does stop,  i suggest the 1st thing ya do is turn da pharkin fuel taps off !!

over the years i have been happy to spin Miss J's standard crank to the high side of 8,000 rpm.  a bloke is starting to get a little anxious about doing that now !!
but i guess a lot of rods have been letting go while just putting about,, so reckon it's just phaaarkin bad luck?
 
Crack tested the 3 near-new OE RGS rods I fitted to my lightweight triple crank 2 years ago, I have no reservations what-so-ever about spinning it to 8500+. :D

It seems most OE rods let go at quite moderate revs, and they are not cast iron, Pete!  They're proper forgings, and quite tough, too.

Laverda triples have been throwing rods for decades, nothing new at all! ::)  Not so sure it has anything at all to do with the metal quality, more a manufacturing or installation issue.  Seen quite a few low-mileage engines with venting holes...

piet
 
and they are not cast iron, Pete!  They're proper forgings, and quite tough, too.
Click to expand...

Just goes to show how much I know (or not)  :P

Forged steel eh?   That's pretty strong - makes you wonder what has happened to the ones that aerate the cases....

To be honest, I just want to keep the triples in one piece. I would far rather be riding them than pulling them apart to fit new rods. Had one crank fail many years back, but don't want another...

Totally confused now  :(

Pete
 
Googling heh Chris???
Seriously, have been hanging out to get my new toy which is due in Melb in 10 days time and am rapidly coming to the conclusion that I had better send it to Red before I get carried away. I couldn't bare that happening to her!!
 
You must log in or register to reply here.
Back
Top