Out and About on your Laverda.No bull,Just photos

piranha-bro2 said:
Innaresting about out of phasing on SF cranks - with that rammed splined 'undisassemblable' centre I woulda thought the factory could get it right. Not quite sure how you'd correct it if you reuse the same centre and the same webs, because the splines are already aligned incorrectly. SFCs are on a non-splined sold pin as are the triples. Getting it right without a jig like Red's isn't easy. I don't mind if my 270 is 269 or 271 - as long as you compensate the cam and ignition accordingly.
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Phil did explain it to me. I wouldn't go into it here where people who regularly rebuild 750 cranks are far more qualified than myself to comment. The 750 cranks are sometimes, often, ?, not 360°. The splined centre piece was pressed into the smooth webs creating splines in the process. There is apparently some leeway when you re-assemble.
I'm certain that, all else put aside, a lot of the different vibrations from one 750 to the next can be attributed to crank phasing.

Paul
 
Paul Marx said:
Phil did explain it to me. I wouldn't go into it here where people who regularly rebuild 750 cranks are far more qualified than myself to comment. The 750 cranks are sometimes, often, ?, not 360°. The splined centre piece was pressed into the smooth webs creating splines in the process. There is apparently some leeway when you re-assemble.
I'm certain that, all else put aside, a lot of the different vibrations from one 750 to the next can be attributed to crank phasing.

Paul
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Nope, no leeway upon reassembly. The splines are a quite tight fit, if they are damaged during reassembly, the webs will loosen themselves rapidly, no way the fixing bolt can hold them in place for long... think loose sprocket on gearbox exit. Both of those are hardened and wear slowly. While the centre journal is hard, the webs are comparitively soft and will wear quickly.

Phasing is generally quite OK, rarely find one with more than 2-3° out, but the odd one with more does surface occasionally. Not much that one can do about it, other than search for another centre piece with a better fit. Or fit a new, never assembled web. ;)

piet
 
Unfortunately Piranha, I didn't get the crank balanced prior to me rebuilding the engine which I regret but saying that from what I have interpreted over the forum the vibration is not unusual for the 750 just unusual if you haven't experienced it before
Skeeta
 
T.C said:
Quick ride to West Head this morning.
Guy on a Harley electric bike turns up.
He had it on loan to do an article about them, $50K :rolleyes:
He likes it, gave Pete a ride, Pete was not impressed, very weird, but absolute shit loads of torque.
Heres a few pics.
West Head is in our 10k radius by the way.
View attachment 58247
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When i see this i love my Laverda even more 💪😃
 
Out and about in the garage which has become overcrowded so I'm having a clean up of the mezzanine where that old racer is going tomorrow. It'll be rebuilt around number 5 position. The burning of my bikes 5 years back now has changed the order and the quantity of work.

I was amazed by the old metal thrown around the mezzanine, and some of the equally old metal thrown around the garage. The 175 Gilera is one of my son's latest acquisitions as is the dismantled Laverda 125 Trail of which the tank is laying on my 650 which is n°2 on the work list after the 125 Sport behind whose burnt front end makes it much less rideable than it was when I bought it in Verona. Son n°2 is beggining to have a nice collection of old Italian metal himself.

PaulMetal 1.jpgMetal 2.jpgMetal.jpg
 
Paul Marx said:
Out and about in the garage which has become overcrowded so I'm having a clean up of the mezzanine where that old racer is going tomorrow. It'll be rebuilt around number 5 position. The burning of my bikes 5 years back now has changed the order and the quantity of work.

I was amazed by the old metal thrown around the mezzanine, and some of the equally old metal thrown around the garage. The 175 Gilera is one of my son's latest acquisitions as is the dismantled Laverda 125 Trail of which the tank is laying on my 650 which is n°2 on the work list after the 125 Sport behind whose burnt front end makes it much less rideable than it was when I bought it in Verona. Son n°2 is beggining to have a nice collection of old Italian metal himself.

PaulView attachment 60087View attachment 60088View attachment 60089
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Well if space becomes a problem, you may throw away the old racer to my place ;)
 
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