Another SF750 problem

Hey Brett. It looks like you were correct on the problem that the shifter had some shaft binding. Works a lot better now. No worries about the humidity here where I live. It's so dry here the local mountain forests burst into flame every year. We call it Fire Season. A little humidity would make my vehicles run better.
 
Well that was way to flippen easy,I though at least some suffering was required to qualify as a Laverda owner.BTW good result
 
Blackwolf said:
A little humidity would make my vehicles run better.
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That's not quite correct Jim.

And by "not quite correct" I mean completely wrong  :D

Engines like cold, dry air.

All other things being equal, an increase in ambient humidity reduces engine performance.
 
Blackwolf said:
The Castrol GTX motor oil is a conventional oil, not a synthetic or a blend. It's fairly common here in the US and I assume what some people use  in other countries may not be available here without special order. I just can't see why such an old engine needs to have a specialized oil. My dad use to run the same Castrol GTX back in the 60's.
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The old GTX has changed since the 60s and 70s.

I agree that using some synthetic nano super oil is not needed..as you should be changing the oil every 1000 /1200 miles anyways, due to the lack of effective oil filtration in the design.

Sounds like you are here in the USA you can get Dino Valvoline 20w50 Motorcycle oil from Walmart for $4.44 a quart. Free shipping on orders over $35..so order at least 8 quarts.https://www.walmart.com/ip/Valvoline-4-Stroke-Motorcycle-Conventional-20W-50-Motor-Oil-1-Quart/16879750

Don't know if the GTX is causing the clutch issues...good question.
 
Been off the forum for a few days - the selector covers (small outer and large inner) are really easy to set up well, but can cause big headaches for those who don't understand how the assembly works. Even the wrong thickness washer in the wrong place can cause binding. Glad you sorted your beast B-wolf. Great idea to replace the clutch cable - there lies the first port of call in a light(er) clutch. i will never own a Laverda without the extended lever fitted - rivet counters be damned  :-*
 
Piranha Brother 2 said:
i will never own a Laverda without the extended lever fitted - rivet counters be damned  :-*
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:D

I agree. I reckon the extended arms look crap. Although I understand the need for a more user friendly clutch lever, especially as most of us are nudging "senior citizen" status with muscles and joints that aren't what they used to be.

I've recently been cogitating on a design for a lighter clutch mechanism that doesn't use an extended lever or reduce clutch travel. I might actually get around to making a prototype in the next month or two.
 
Dellortoman said:
:D

I agree. I reckon the extended arms look crap. Although I understand the need for a more user friendly clutch lever, especially as most of us are nudging "senior citizen" status with muscles and joints that aren't what they used to be.

I've recently been cogitating on a design for a lighter clutch mechanism that doesn't use an extended lever or reduce clutch travel. I might actually get around to making a prototype in the next month or two.
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Interesting, Cam. I'm thinking a set of geared wheels for the cable run? Bicycles use something like that to alter the pull ration between different types of brakes and levers.

I spent quite some time on my lathe-pretend-it's-a-mill making billet alloy connectors for the clutch cable attachments for the extended levers. I will have 3 sets spare that I'm going to advertise on the forum - it's basically bling and IMHO they will look really nice. It would be up to individuals whether they cut the little slot or use DAM's S-bend extensions for those who fear a devaluation on many thousands of dollars if they modify their rivets.

I'll post pics once I've finished my motor - could be a while, but hopefully not.
 
I actually mis-read your post Quentin. What I read was "i will never own a Laverda with the extended lever fitted"  :-[

My idea for a lighter clutch is to use a vacuum assist arrangement. I dunno whether a suitable vacuum booster is available, so I may have to make one.
 
My Pantah has a cable clutch and was almost as hard a pull as my 3C, but the way its bottom lever worked there is zero chance of extending it. I was at Gowanlocks a while back and had a go on their race Pantahs clutch and it was way lighter than mine and their secret was using an Aprilia dogleg lever and perch,$60 or so from them, seems they have a lighter geometry and work with the huge cable nipal. It's still pretty hard but bearable  at least I don't get cramps after a few hours in the twisties
 
Dellortoman said:
I actually mis-read your post Quentin. What I read was "i will never own a Laverda with the extended lever fitted"  :-[

My idea for a lighter clutch is to use a vacuum assist arrangement. I dunno whether a suitable vacuum booster is available, so I may have to make one.
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Ha haa! You obviously haven't read my byline, Cam.

The Skoda (which is at the doctor's due to clutch pedal/hydraulics issues) has a spring assist for the second half of the pedal travel to overcome the spring effect at the clutch plate.
 
Piranha Brother 2 said:
Ha haa! You obviously haven't read my byline, Cam.

The Skoda (which is at the doctor's due to clutch pedal/hydraulics issues) has a spring assist for the second half of the pedal travel to overcome the spring effect at the clutch plate.
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Blimey, that's a simple idea. Hmm ...
 
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