The Drive Chain Hits The case

[GregT]

One quench seems to produce a satisfactory result.
The last thing you want is a sprocket which is too hard as it may well be too brittle - some ductility is still needed.
The japanese aftermarket sprockets I work with seem to be the modern equivalent of EN36 and are hardened to about a .020in depth.
This method of softening works well enough to make machining easier.

Vince - if you've got something to contribute, please do.....just not a sheep joke please....

 

[Grant]

Ok, I'll put Laverda SF right shall I?

Motodd Rob has a 1200 triple-engined Motodd bike.
He also has an SFC 750 (owned from new) and I am pretty sure he has no problem using them to the max.

So it would be interesting to see your SF against his SFC some time... 

I think Rob was pretty tongue-in-cheek when he wrote that by the way.

 

[Vince]

Greg,I like lamb,when I can afford it.I had something called a Lamb steak the other night,it took me back to the home killed sheep my pop used to do back on the farm when I was a kid.Grant has the ball,I was going to respond to the prodding back a bit.Looks like we have another clan in Laverda land,180s 120s and twins.WHY CANT WE ALL JUST GET ALONG.Robs comment was a joke,remember them.BTW have you heard the one about why the sheep in NZ wear gum boots.

 

[motoddrob]

gutless old 750s

Where you from - A 8000rpm 750 Twin Breganze will burn most - You got a lot to learn.

I run a 140 70x18" profile with a Wide 530 Super Bike X-Chain on the STK 2.85" Borrani Rims without scuffing the trailing arms or Tire and it's all STK - Think about it when you got the guts to pass me at 130+mph, providing you can skip with me through the Country Side before stepping onto the Free-Way - I'll tip my Visor - If you can keep up.

LaverdaForum is all about support & nothing to do about boasting - So Bug Off with your Triple Junior - LOL

Do you build your mount and ride or do you dress up pretending to be a Motorcyclists?

I've owned a Suzuki 1100SE - Great Ride and FAST but nowhere near the hands on confidence I've experienced with Breganzes over the my 50 years of riding and most of all - I'm still Riding

WTF????????????????????????????????????

 

[sfcpiet]

C'mon, Vince, please tell us.

Why do the sheep in NZ wear gum boots??

piet

130+mph SF... my arse.  

Over the edge of a cliff, perhaps!

 

[motoddrob]

130+mph SF... my arse.  

Over the edge of a cliff, perhaps!


I wasn't even going to go there Piet, can't be bothered, but fuck it.
Having brought a new SF2 in 1974 in Perth, sold it 10 years later in San Francisco after 200,000 km riding flat out over a good part of Australia and North American. Also have had an SF1 and 3 along the way before settling with my one owner 1974 SFC I guess I don't qualify to comment on 750s. But as the expert sez, I've got alot to learn!!!!
I do know that when I brought my 1200 Mirage TS, my first and only triple, it was way more powerful than any of my 750s. When hooning with my mates riding triples/Z900 and the like back in the 70s my 750 never had a problem keeping up in corners but as soon as the straight appeared they left me for dead. Even when my SF2 was new I'd be lucky to see 120mph on the ND speedo, I must have got a shit one from the factory then!! 115 tops would be my guess.

"LaverdaForum is all about support & nothing to do about boasting - So Bug Off with your Triple Junior - LOL"

I'm still trying to figure out where I was boasting in my comment about 520 chains and wide rear tyres????

"Think about it when you got the guts to pass me at 130+mph, providing you can skip with me through the Country Side before stepping onto the Free-Way - I'll tip my Visor - If you can keep up."

And that comment is not boasting??

My comment about gutless 750s was tongue in cheek but I'll stand by it as compared with my nicely tuned 1200 with some carb/ign upgrades, Axtel cams, it makes my very nicely running SFC seem slow. Add the Motodd frame into the mix and all of a sudden not only does the 1200 go well it also handles far superior than any standard triple. But what the fuck do I know being a pretending motorcyclist!!

 

[Dellortoman]

I think you've got it arse-about Vince. It's "why do NZ farmers wear gumboots?"

 

[Vince]

Cam I was trying to remember the punch line and work backward,thats my excuses and I am sticking to it

 

[sfcpiet]

Well, why do they?? ???

piet

 

[Vince]

Well after the resent sporting stuff,The reason why Kiwi farmers wear gum boots is so the sheep have somewhere to put there back legs and allow the farmers hands are still be free.Sorry Greg,they made me do it.

 

[GregT]

Greg,I like lamb,when I can afford it.I had something called a Lamb steak the other night,it took me back to the home killed sheep my pop used to do back on the farm when I was a kid.Grant has the ball,I was going to respond to the prodding back a bit.Looks like we have another clan in Laverda land,180s 120s and twins.WHY CANT WE ALL JUST GET ALONG.Robs comment was a joke,remember them.BTW have you heard the one about why the sheep in NZ wear gum boots.

Oh yes, heard it many times....have you heard the one about the Aussie cricket team in SA ?....OH dear, 29/9....your lot nearly took our record away.
I was hoping your reply may have been from a metallurgy expert....but sadly, disappointed again.

 

[Simonr501]

Well, why do they?? ???

piet

Well, it looks like you have got your gumboot answer Piet, but do you know what FIG JAM means?

FIG JAM

 

[sfcpiet]

Simon,

I've heard it before but don't remember... old senile bugger that I am!

Please enlighten me!

piet

 

[Simonr501]

F@ck I'm Great, Just Ask Me.

 

[Laverda SF]

130+mph SF... my arse.  Over the edge of a cliff, perhaps!

Has to be one in ever crowd who can't read either.

I didn't say a SF could do 130 mph. I said it would take 130 mph to get bye one. If you've never had an SF rev 8000 rpm or riden it over 120 mph then you're not much of a Mechanic.

A 750 SFC is capable of 135 MPH and there is not much difference between it and the SF. All you have to do is raise the compression a little, use a slightly bigger cam with stronger springs, put on headers & re-jet & 120+ mph is not out of reach by anymeans.

I would not consider building the engine to SFC Racing Specs ideal for the street.

 

[dja981]

Has to be one in ever crowd who can't read either.

I didn't say a SF could do 130 mph. I said it would take 130 mph to get bye one. If you've never had an SF rev 8000 rpm or riden it over 120 mph then you're not much of a Mechanic.

A 750 SFC is capable of 135 MPH and there is not much difference between it and the SF. All you have to do is raise the compression a little, use a slightly bigger cam with stronger springs, put on headers & re-jet & 120+ mph is not out of reach by anymeans.

I would not consider building the engine to SFC Racing Specs ideal for the street.

I think you just lit the blue touch paper 

                                                  Dave

 

[sfcpiet]

F@ck I'm Great, Just Ask Me.

Has to be one in ever crowd who can't read either.

I didn't say a SF could do 130 mph. I said it would take 130 mph to get bye one. If you've never had an SF rev 8000 rpm or riden it over 120 mph then you're not much of a Mechanic.

A 750 SFC is capable of 135 MPH and there is not much difference between it and the SF. All you have to do is raise the compression a little, use a slightly bigger cam with stronger springs, put on headers & re-jet & 120+ mph is not out of reach by anymeans.

I would not consider building the engine to SFC Racing Specs ideal for the street.

This is getting ridiculous...

Been in the Laverda game professionally for almost 20 years, dabbling with the beasts for over 30 years.  In this time, I've managed to ride  a few pukka SFCs, as well as very many S/SF/1/2/3/GT/GTL models, not to mention the myriad of triples.  And I usually take clients' bikes to their limits 'cos I well know my customers do it, and if it goes pop, I'm the one that gets the blame.  Nothing much gone wrong till now, usually the owner who thinks a change of jets is all that's required to blow off the neighbours' Suzuki is the one that manages to put piles of work and dedication to ruin!

Stock(!) SF1/2/3s are hard put to top 180-185km/h (115mph), it requires a lot of work, knowledge ans experience to get over that AND retain the Laverda typical reliability.  Probably the most effective speed mod would be a full fairing, but that is a total no go with most Lav owners, and rightly so.  There's more to a SFC than a set of headers and cams...  

Perhaps your SF really does manage to crawl to 120+, so what?  A triple still hasn't topped out in 4th. at that speed, so where should the difficulty lay in keeping up?

BTW, stock SF Borrani rear rim is WM3/2.15".  A 120 tyre is a satifactory fit(just), a 130 too wide and a 140 definitely over-tyred.   Probably no more than 130mm total width with a totally crap contour.   Basic rim size for a 140 would be 3.5".

And as for building and posing, see below, exiting Eau Rouge in Spa Franchorchamps, 2009.

C'mon over and put your money where your mouth is! :-*

piet

 

[Laverdalothar]

Only ever had a problem with one or two 750's in SPA. That said, one was a well ridden SFC and the other one was having Heidenau Race tires and the rider was way more experienced than me at that time. Got him on the 3rd lap I think and never saw him again...  

As much as I tried, I could not keep up with Piet though, not to talk about Andre or Rob or any other... The 750's typically manage to make 5 rounds if the rider is very brave and the bike is pushed hard during the 20 minutes of each run. Quick people like the ones mentioned above do 6 rounds on a triple.

me at the same place as Piet, last year:

and the year before...: