Dellorto spring above the slide

discussion about the 750 Sport and '89/'90 900SS, which share many mechanicals with the Paso series
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ir_joep
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model: 750 Sport
year: 1989
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Dellorto spring above the slide

Post by ir_joep »

Hi,
Who knows the required strength of the carb slide(?) spring of a 36mm dellorto.

I can buy different types of 1.1 to 1.4 kg

The carb slide will be directly connected to the throttle cable.

Thanks in advance

Joep
Mc tool
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Re: Dellorto spring above the slide

Post by Mc tool »

I think that with 2 carbs the combined force of 2 springs is very tough ( they are known for it ) so you have the option of lighter springs for dual carbs ( on some bikes these springs are the only throttle return springs ) and , I spose if your cables are short and well routed you could save yourself some wrist action and go for the lighter springs :)
I wish I was young again............Id be heaps smarter than last time
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ducinthebay
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Re: Dellorto spring above the slide

Post by ducinthebay »

I bought the lighter springs, and quickly followed with making new cables. All works wonderfully.
If there is one carb, and its on a dirt bike, the stiffer spring makes more sense. But trying to hold open that stiff throttle on a street bike will pump up your forearms in a short time.

Cheers, Phil
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
Mc tool
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year: 1990
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Re: Dellorto spring above the slide

Post by Mc tool »

If your into making throttle cables a good cheap way is to buy mountain bike type gear cables and modify them. The better quality ones are still way cheaper than buying cable by the metre :)
I wish I was young again............Id be heaps smarter than last time
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Derek
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Re: Dellorto spring above the slide

Post by Derek »

Mc tool wrote:If your into making throttle cables a good cheap way is to buy mountain bike type gear cables and modify them. The better quality ones are still way cheaper than buying cable by the metre :)
Good tip Hamish. I used to make all my own cables but it's too much effort to track down the components these days, but mountain bike stuff is cheap and readily available.
1994 907ie
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ir_joep
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Joined: Sun Jul 26, 2009 7:35 pm
model: 750 Sport
year: 1989
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Re: Dellorto spring above the slide

Post by ir_joep »

Image


This is my current setup. I have installed the 0.7 kg springs but I have also bought the 1.1 and the 1.4 kg ones.

Throttle control with splitter is from a cagiva elefant. Jetting and needle will be as per F1

Thanks for your advice
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