Here's a litte pictorial how-to on throttle body synchronization. Today was the first time I ever did this so I'd appreciate any comments from those in the know, especially on the last part that deals with the throttle lever gap.
Synchronizing the throttle bodies (TB) insures that the flow rate of air into each cylinder is identical. A number of undesirable symptoms occur if the TBs are not synchronized. These include a rough running motor with more vibration than normal, also power and gas mileage will be reduced.
Each TB has a small port at its base which allows measurement of the air pressure inside the TB. This pressure will be less than ambient due to the opening of the intake valves during the piston’s down stroke. On the SV1000 there is a single TB synchronization screw which simultaneously changes the position of butterfly valves in both TBs. When the air pressure is the same the TBs are synchronized. Static vacuum measuring devices such as a mercury manometer or air flow measuring devices like rotometers (ball in tapered tube) may be used.
The first step is locating the small ports at the base of the TBs. Both are visable when looking through the large triangle opening in the frame on the right side of the bike.
Note: This statement is incorrect and will be appropriately edited in the final version of the How-To.
Synchronizing the throttle bodies (TB) insures that the flow rate of air into each cylinder is identical. A number of undesirable symptoms occur if the TBs are not synchronized. These include a rough running motor with more vibration than normal, also power and gas mileage will be reduced.
Each TB has a small port at its base which allows measurement of the air pressure inside the TB. This pressure will be less than ambient due to the opening of the intake valves during the piston’s down stroke. On the SV1000 there is a single TB synchronization screw which simultaneously changes the position of butterfly valves in both TBs. When the air pressure is the same the TBs are synchronized. Static vacuum measuring devices such as a mercury manometer or air flow measuring devices like rotometers (ball in tapered tube) may be used.
The first step is locating the small ports at the base of the TBs. Both are visable when looking through the large triangle opening in the frame on the right side of the bike.
Note: This statement is incorrect and will be appropriately edited in the final version of the How-To.