XS650: Carbs … Dell orto   Leave a comment

Over a few biers and bullshit-i dont drink the topic turned to Dell’Orto carbs…was interesting so i started taking notes as i have thought about going there myself…i havent tried these so dont take this as gospel.

The general consensus was that PHF DD-destra or right and PHF DS-sinistra or left as 30, 32, 34mm are better suited for the XS, some have used 36, 38 40mm versions but found them over the top…get them paired DD and DS otherwise setting problems arise.

The 32 and 34mm versions were successfully mounted in XS-SE 650 and SR 500 manifolds, the SE 650 had the advantage that vacuum barbs are present-unless you have done Gorans vacuum port mod.

For second hand carbs look for ducati or guzzi models

  • lever choke not cable, and is only required on the LHS
  • you want the models with the round plastic or alu cover, not the tubes, cables enter at 45° or 75°, some have side cable mounts and are better for space
  • get the version with an accelerator pump
  • brace against vibration
  • use softer return springs
  • get the 2 into 1 cable fittings as found on Ducati California III and Guzzi Le Mans IV

Some Info: XS650 Dellorto

this old tractor some info here too…dont really find this too interesting though

ducati meccanica interesting site…the following are found there

dellorto tuning guide

factory jetting guide

dellorto jetting/dellorto parts book

needles charts

setting float levels

factory set-up for singles

PHF parts list and diagramme

from stein-dinse.de

needle chart PHF

slides

jets

from dell orto

english version of manual found here

some settings
PHF32
Slide…………….60-3….50-3….50-3….50-3….70-2
Idle jet…………….50…….57…….55……….. ……57
Main jet………….170.. …125…..125…..135…..125-130
Atomiser…………265……262…..265………. …..262
Needle……………K16……..K6…..K18…….. ……..K6
Starter jet………..75……..75…….80…………… ….
Needle Ventile..250……250….250…………….. ..
Pump jet…………..?………35……..35……….. ……..
Float………………………………….10g @ 18mm

………………..PHF30………………PHF36
Slide………………………………………..50-3
Idle jet………..55……………………….57
Main jet……..125…………………….120
Needle……….K23-mid setting…..K5-top setting
Atomiser…….262……………………262
Float…………8.5g

– dont forget this was liberally lubricated with mind altering substances so reader beware.

 

dell orto PHF36…from Kalle…says they fit like they belong

 

dell orto PHF30

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Posted January 10, 2011 by xscafe in Carb - Dellorto

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