throttle cable gt

E

Evan

Full member
Location
Texas
On page 80 of the Laverda 750 manual is Throttle Cable #31. Page 81 has the 2 throttle cables that look like cables from top of carb cable adj to connector. Would these be the same for both the Gt, Sf, & Sf2?
Ok my Gt and early Sf have one cable from connector to handle. Is there a throttle cable # for the cable going from the connector to handle? Low bar???
 
I expect carb top to connector is the same on all twins. Doesn't really matter anyway.
I don't understand the rest of your question.
A cable needs to be functional, long enough so as it doesn't pull when turning the handlebars and short enough so as to tuck away nicely.

Paul
 
My SF(0) has two cables to the twist grip, but next year I will convert it to the 1-into-2 splitter type. Reason being I think it will hold onto carb balance a little better that way.
 
Not sure if this helps but if you are only after cable part numbers, the 750 manual for Gt and early Sf lists them as follows:-
Twist grip to splitter - 36110401 43 (Low Handlebar)
  "      "      "        -  36110402 44 (High handlebar)
Splitter to carbs      -  36110403 45
(Edit - Probably worth looking at Laverda Paradies 750 catalogue which illustrates set up for specific models and provides lengths of cables for different models / carbs, so should give you info you are after? )
 
Haggis said:
My SF(0) has two cables to the twist grip, but next year I will convert it to the 1-into-2 splitter type. Reason being I think it will hold onto carb balance a little better that way.
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It won't change a thing concerning carb balance, in fact it may well add another trouble point, that being the fit of the carb cables in the splitter. If they hang up a bit on the splitter, all the hard synch work goes down the drain.

Paul
 
couldn't agree with you more Paul (Marx) for once!
Paul (Haynes) idea of three cables instead of two does not make sense, introducing something that is not there and when not there cannot cause problems, adjustment and hence balancing of carbs is also easier, you do have to have a little slack in them though so as to not change anything as the handlebars are moved, also the splitter has friction and with a bit of water ingress and dust, its actually quite a lot of friction, which is undesirable, a bit like me (sometimes)
CLEM
 
Just had to check the calendar to make sure it's not April 1st !  Sorry to be in total disagreement with Mr. Marx and the Clemster  :) 

Whenever a bowden cable moves about, the relationship between inner and outer length changes by a small amount. Having 2 long floppy cables which are subject to steering input and road-load movement makes no sense whatsoever. Not to mention the extra length over which wear occurs.  Those 2 cables effect off-idle balance, so why use them?

Much better to have a single 'long-moving-floppy' cable going to a junction that is stationary relative to the carbs. A well set up splitter need add almost no friction (I'm talking of using a decent splitter, thorough internal smoothing and appropriate lubricating as well as ensuring cables enter and exit in s straight line). Almost certainly less friction that 2 great long cables.

You say yourself Clem 'add a bit of slack so nothing moves when the handlebars are turned'. Hence my recommendation.

Did I fall for a wind up here? Or should all those with 3Cs start changing their throttle operation to a 3 cable system?  :)

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Speaking from about 50 years of experience with all sorts of bikes, I think the Haggis Theory makes sense than the Marx-Clemtog Theory.

The twin cylinder bikes I've owned with separate cables from twistgrip to carbs have all suffered from carby balance issues. It's difficult to maintain carb balance from one ride to the next.

Bikes with a single cable to a splitter, then short cables to the carbs seem to hold their carb balance better.

Also on bikes with two full length cables, all that cable friction can lead to a heavy throttle if the cables are not in perfect condition. There's way less friction in a splitter than there is in the length of (necessarily curved) cable that it eliminates.

On twin cylinder bikes like Laverda with the carbs located close to each other, it makes sense to use a cable splitter as close as practical to the carbs. It's only bikes with the carbs miles apart (eg. Ducati, and perhaps Guzzi) where separate cables from the twistgrip make some sense. But even then it's debatable.
 
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