Jota Starter 120° / Bosch 0 001 160 003

Ron your talking shit again, no breganzie laverda came with a clutch cutout switch, or triple for that matter as all used the same clutch perch up till the hydraulic clutch models which I don't think they even had the cut-out switch either.
I've owned 750s for 47 years, done hundreds of thousands miles on them, accidently hit that button many times while riding and have NEVER blown a starter motor. I've known many 750 owners during that time and have never heard of anyone blown their starter motor by hitting that button.
Your bike had the exact same starter set-up as every S/SF model produced.
You had a problem with your starter clutch, as you say the rivits came loose in which case the backing plate was not doing it's job and the rollers probably got jammed. Now you've got to ask yourself, why did those rivits come loose!!
 
Laverda SF said:
Dellorto - Apparently you have never owned say a 69 750S or a 70 /71 SF.
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You're right Ron. I have never owned any kind of Laverda twin.

But I still find it difficult to comprehend how hitting the starter while the engine is running on ANY bike with a sprag clutch would cause it to grab.
That scenario seems impossible to me. So I suspect that the self destruction of your starter was caused by something else, and you hitting the starter button was either coincidental, or only played a minor role in the story.

I suppose one possible scenario could be that the needle roller inside the starter freewheel had disintegrated, and was already on the verge of seizing. In that case, hitting the starter may have caused the freewheel to be jerked out of alignment and jam on either the shaft or the starter clutch housing. But the primary cause in that sequence of events is the bearing failure, not the starter button. It's likely to have seized eventually without you hitting the starter. Do you recall whether that needle roller bearing had to be replaced when you took it apart to fix it?
 
motoddrob said:
Ron your talking shit again, no breganzie laverda came with a clutch cutout switch, or triple for that matter as all used the same clutch perch up till the hydraulic clutch models which I don't think they even had the cut-out switch either.
I've owned 750s for 47 years, done hundreds of thousands miles on them, accidently hit that button many times while riding and have NEVER blown a starter motor. I've known many 750 owners during that time and have never heard of anyone blown their starter motor by hitting that button.
Your bike had the exact same starter set-up as every S/SF model produced.
You had a problem with your starter clutch, as you say the rivits came loose in which case the backing plate was not doing it's job and the rollers probably got jammed. Now you've got to ask yourself, why did those rivits come loose!!
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Got rivetted by the barmaid... ? ;)

piet
 
Ron has already inadvertently explained why his starter clutch seized and blew his starter motor to smithereens - the rivets came loose and my theory is that - as Cam says, either coincidentally or as a result of pushing the starter button - one or more of the rollers has gone sort of sideways and jammed itself nicely in the mix. I will NEVER fit a neutral or clutch lever cutoff switch to my Breganz(i)es! Can we move on? PLEASE!!!!!!!!!

(take a deep breath, Quentino ...)
 
Vince said:
We all should go back to kick start bikes, these electric starts are the work of the Devil. They will fail and you will rule the day kickstarts went away. Kick starters can be fixed on the side of the road, I always carry a spare kick lever for when not if the evel electric start fails. Its fun to kick start a stalled bike at traffic lights, who cares about all that horn honking when its so much pleasure kicking away.
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I wonder what sort of force it would take to kick start a Jota? I had a Montesso 348 trials bike when I was a kid, single cylinder. Could just about kick start it but if I got wrong the bloody thing would nearly throw me off :-)
 
I rode Hansie Hoppe's kick-start 81 Jota in Sweden one time.. I had a crack at kicking it but I couldn't get anything out of it, he needed to start it for me! :D
It was a clever modification borne from getting stuck out in the Oz boondocks due to a flat battery. Bump starting on dirt is difficult.
 
I remember Hansi Hoppe well from my trips to Silberstead Germany (I was the only Brit to ever go there, WHY? I kept telling friends and all back home its a good'un and you must go)) sadly that meeting is very likley finished after 32 years? as Heinz heinric has (very regrettably) died, Hansi's bike was modified using Triumph Bonnevill kick start parts, and I could not ride it due to the right leg having to be "inside" of the starter crank when sat on the bike, it felt vulnerable as well, not that I had planned t crash!
anyone know where he is now?
CLEM
 
Remember the days back in 68 when you could kick a 650 Bonney over and possibly get her started after tickling them God Forsaken Amals with a Zener Diode without a Battery ;o)

Did not need a battery in a 74 Volvo GTL 4 Spd with OD and mechanical Pill Fuel Injection on the B2000 mill either - All you needed was a push from your local Bar Maid to get you off to work in the morning - My most favorite Volvo. Beat the BMW 333i for the Best Car of the Year according to Motor Trend in 74 but that Toyota Crown straight 6 was something else ;o)

I had a 70 1/2 Z28 Camaro and a modified 72 340 Challenger in the garage at the time back in Northen Ontario and that Toyota Crown was hard to beat in extreme weather and road conditions - Granted the fastest I ever did on 4 wheels on was in that modified 72 Dodge 340 Mag Rally Challenger = 170 mph+ while trans-versing Alberta Canada. Just under an hour pulling out of a corn field just south west of Calgary when the sun came up after leaving Vancouver the night before to hit the Saskatchewan boarder by noon.

They don't name the 70/73 Dodge Challenger the "Vanishing Point Car" for nothing - Yet the AMC Javelin beat her and the Camero all to Hell in Trans AM Racing.

Whatever ever became of the North American V8 carburated Pony Muscle Car Trans AM Rides - Disappeared around 74 - Great long distant HWY rides but they did consume a lot of gasoline. Actually I got close to 50 mpg and faster that Dodge in severe conditions with my Volvo's.
 
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breganzane said:
I rode Hansie Hoppe's kick-start 81 Jota in Sweden one time.. I had a crack at kicking it but I couldn't get anything out of it, he needed to start it for me! :D
It was a clever modification borne from getting stuck out in the Oz boondocks due to a flat battery. Bump starting on dirt is difficult.
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Interesting modification. Do you have any photos?
 
Ron, one of my customers has a two door GT Volvo (rare here) rubber bumper model. He put a hot 400 Chev and a locked up 9” diff in it. The fucker rocks around like a doggie on the parcel shelf at idle.

He needs Vince’s fold up pegs Batto.
 
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