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Main jets fit all Dellorto and their replicas. There are the following variables in the individual carburetors used:
12mm - 17.5mm / 6 mm nozzle size
19mm - 24mm / 5mm nozzle size
from 25mm / 6mm main jet
The nozzles are also suitable for example in the standard Mikuni carburetors. CPI, Keeway scooters. Especially after the installation of a sports exhaust and a 70 cylinder is a larger main jet usually required and recommended. The nozzle by 10% -15% zoom, is a good choice for most sport exhaust and 70 cylinders. However, this is only a recommendation. Begin always when tuning with too large a nozzle on. If the engine stutter something the mixture is too rich and you should now "grope" gradually down until the engine runs smoothly. The confirmation of the correct main jet, you get only from the spark plugs image.
reddish-brown color = optimal
dark to black color = too rich mixture [Main jet too large]
gray to almost white color = lean condition [main jet is too small] risk of piston seizure and engine damage
Main jets fit all Dellorto and their replicas. There are the following variables in the individual carburetors used:
12mm - 17.5mm / 6 mm nozzle size
19mm - 24mm / 5mm nozzle size
from 25mm / 6mm main jet
The nozzles are also suitable for example in the standard Mikuni carburetors. CPI, Keeway scooters. Especially after the installation of a sports exhaust and a 70 cylinder is a larger main jet usually required and recommended. The nozzle by 10% -15% zoom, is a good choice for most sport exhaust and 70 cylinders. However, this is only a recommendation. Begin always when tuning with too large a nozzle on. If the engine stutter something the mixture is too rich and you should now "grope" gradually down until the engine runs smoothly. The confirmation of the correct main jet, you get only from the spark plugs image.
reddish-brown color = optimal
dark to black color = too rich mixture [Main jet too large]
gray to almost white color = lean condition [main jet is too small] risk of piston seizure and engine damage
