how to set up dellorto accelerator pumps - seems like pissing in the wind

[nick7]

The SFC 750 doesn't use the accelerator pumps and shows no signs of the carburation suffering compared to a std model - or even an SF tuned to a similar spec. Most riders don't even know when the pumps have packed up and, as most other carbs don't use them, i tend to think that they were only a gimmick at the time of introduction. I have raced with and without and can't really say that any difference was noticed, except for a smoother throttle action with the lifter arms removed. As they were fitted to other italian machines, that subsequently had other carbs fitted, it would appear they were only a passing fad.

These are not my words,btw, but a certain Mr Todd...
On my Jota, I noticed no difference when they were disconnected. But they are back as Keith maintains they are needed and replaced the buggers...which I can't be arsed to tamper with them again!! And the bike runs so sweetly I'm touching nothing, for which I think it is grateful
Nick7

 

[RUSS]

Try disconnecting the pumps. I did this once and the difference was a small loss of urge at big throttle openings. Economy improved 10% and I have wondered what all that extra fuel does to cylinder lubrication when using a lot of on / off throttle at moderate speed.
I live in the country these days and the pumpers are connected.
I can't imagine turning the screw adjusters will make much difference to the power, but I read on with interest....

 

[laves]

Try disconnecting the pumps. I did this once and the difference was a small loss of urge at big throttle openings. Economy improved 10% and I have wondered what all that extra fuel does to cylinder lubrication when using a lot of on / off throttle at moderate speed.
I live in the country these days and the pumpers are connected.
I can't imagine turning the screw adjusters will make much difference to the power, but I read on with interest....

Fully agree Russ!
On my RGS a certain Augusto Brettoni decided to just chuck away the whole dellorto accelerator pump setup
As such i rode the RGS - without accelerator pumps - for approx. 1.500 km
it is OK for me
Occasionally, 4 X (not more), i experienced a 1 second cutout effect when accelerating in 4th gear from low rpm during (very) relaxed touring
for me and until now this simplification works reasonably well

eric