Dellorto Sha Carb Tuning
Dellorto can be found on such as and many Italian makes like,. Dellortos are also a popular carb to retrofit for mopeds.Dellorto ModelsPopular models used on include the SHA series and the PHBG series.The SHA Series is a flatslide carburetor with a hand or cable with fuel adjustment limited to the. The SHA series comes in the following sizes 9,10,12,13,14,15 and 16mm.
There are three types used on Dellorto SHA carburetors: A direct lever push down lever on carb to put choke “on”, give full throttle to release it “off” B linkage lever same operation as direct lever.
Many SHA series carburetors have two internal diameters such as the SHA 14/12. The bore diameter is 12mm at the choke opening and 14mm throughout the rest of the carb. The SHA carburetors found on models are a special low profile design and come in 9-13mm bore sizes. The don't share parts with the regular SHA carburetors but use the same jet type. SHA carbs take 5mm Dellorto jets (same as PHBG).For more info on function and tuning see:The PHVA Series uses a round slide with needle, has 3 jets and an idle mixture adjustment screw. It can be equipped with a lever, cable or electric choke.
Dellorto Sha Carb Tuning Tool
It can be found on models with the engine and many scooters. PHVA carbs take a 6mm main jet - PHBG and SHA main jets will not fit.The PHBC Series shares its design with the PHBG series but uses a different style choke lever. This carburetor is said to be somewhat popular with tuners in Europe.The PHBG Series carburetor is popular on racing mopeds equipped with big bore cylinders.The PHBG is a round slide carburetor with mixture adjustment, adjustable needle valve and three replaceable fuel jets. The PHBG has a main jet, starter jet and idle jet. The PHBG carburetor can be found in sizes 15-21mm. PHBG carbs take a 5mm jet (same as the SHA). The PHBG can be equipped with a hand choke or a cable choke and can be equipped with a male or female intake connection.
See also: and.Note: If you run a PHBG, it is recommended that you check the atomizers first before installing the carb; Dellorto supplied shops with some PHBGs with four-stroke AN atomizers, and the 9562 AN type atomizer bushing. If the atomizer part number starts with AN, it's a four-stroke atomizer, and it may be more difficult to tune and run very rich at idle and too lean at the 5/16 throttle position on piston port engines. All two-stroke atomizer part numbers start with AU and use the 9655 AU atomizer bushing.For more information, please read.Dellorto ManualsFor information on Dellorto tuning, check out the manuals.Maintenance. A video shows how to clean or replace a Dellorto carb.