Tuning Tips This is a page I intend to fill up with some basic maintenance, common problems and tips to help sort out the tuning of Solex/Mikuni sidedraughts. These are in addition to and come from the information contained in the Mikuni PHH Carburetor Service Manual and Toyota's service manuals that cover Solexes used in 2T-G and 18R-G powered models. Here are pictures which identify the location of most of the parts used for and during tuning, shown on an S5 type. These parts and relative locations can be related back to all the other Solex/Mikuni types.
Solex DIDTA Parts. Solex DIDTA Carburetor Parts and. Pump Diaphragm for Solex Mikuni DIDTA carburetors as used mainly on. The user manual for the. Solex DIDTA Parts. Solex DIDTA Carburetor Parts and. Pump Diaphragm for Solex Mikuni DIDTA carburetors as used mainly on. The user manual for the.
A picture of a typical central balance arrangement found on 2T-Gs and 18R-Gs will come shortly. There will be another couple of pages linked off this page with more tips and advice shortly as I re-learn how to add and edit the links. Mikuni Jetting Table When Mikuni sold the PHH40 and 44mm as a performance option they provided an initial jetting specification with each carburetor. This is a good place to start when applying the Solex and Mikuni to performance or competition use. Toyota and other manufacturers using the Solex had their own jetting tables which changed constantly, as required through the evolution of the motors using them. From Mikuni's manual. Description Size for PHH40 Size for PHH44 Main Jet 140 150 Main Air Jet 180 200 Pilot Jet 57.5 57.5 Pilot Air Jet (fixed) 140 120 Outer Venturi 32 34 Inner Venturi 12-16 10.5-14 Throttle Plate #165 #175 Jet Block Assembly 5.8 - (6x2.5 & 4x1.5) OA Bleed Pipe T Fuel Needle & seat 1.5 1.8 Pump Jet 40 40 Idle Mixture/Pilot Screw 1.0 turns 1-1/8 turns Typical Toyota Jetting There are now so many jetting sets out there that this can only be typical examples.
Please, if possible refer to the Service manuals.
Updated /h1>If you have problems please ask. If you have tips or jetting please advise and I can add info to this page. Tuning Tips This is a page I intend to fill up with some basic maintenance, common problems and tips to help sort out the tuning of Solex/Mikuni sidedraughts. These are in addition to and come from the information contained in the Mikuni PHH Carburetor Service Manual and Toyota's service manuals that cover Solexes used in 2T-G and 18R-G powered models. Here are pictures which identify the location of most of the parts used for and during tuning, shown on an S5 type. These parts and relative locations can be related back to all the other Solex/Mikuni types.
A picture of a typical central balance arrangement found on 2T-Gs and 18R-Gs will come shortly. There will be another couple of pages linked off this page with more tips and advice shortly as I re-learn how to add and edit the links. Mikuni Jetting Table When Mikuni sold the PHH40 and 44mm as a performance option they provided an initial jetting specification with each carburetor. This is a good place to start when applying the Solex and Mikuni to performance or competition use.
Toyota and other manufacturers using the Solex had their own jetting tables which changed constantly, as required through the evolution of the motors using them. From Mikuni's manual. Description Size for PHH40 Size for PHH44 Main Jet 140 150 Main Air Jet 180 200 Pilot Jet 57.5 57.5 Pilot Air Jet (fixed) 140 120 Outer Venturi 32 34 Inner Venturi 12-16 10.5-14 Throttle Plate #165 #175 Jet Block Assembly 5.8 - (6x2.5 & 4x1.5) OA Bleed Pipe T Fuel Needle & seat 1.5 1.8 Pump Jet 40 40 Idle Mixture/Pilot Screw 1.0 turns 1-1/8 turns Typical Toyota Jetting There are now so many jetting sets out there that this can only be typical examples. Please, if possible refer to the Service manuals.
