Clutch Gear Cog 21 teeth “COSA 2” for “COSA 2” clutch FA ITALIA

• helical cut teeth
• clutch: Ø 115mm

The gear cog attached to the clutch assembly drives the primary gear cog attached to the input shaft in the large frame VESPA motor. Through varying the size or number of teeth on this cog, you can change the primary gear ratio of your motor. Changing the clutch cog is the quickest and easiest way to change the overall gear ratio of your motor. The more teeth the clutch gear cog has, the higher the gearing.

The gear cogs for the COSA II clutch are available with 20, 21, 22 and 23 teeth. The cogs with 20 or 22 teeth fit into 125-150cc motors and the 21 or 23 toothed cogs into the 200cc motors without having to also replace the primary driven gear cog. If, on the other hand, the primary gear cog is also replaced, all clutch cogs can be used with both motor sizes. The primary driven gear cog in the 200cc motor with 65 teeth can be combined with 21 or 22 toothed cogs, along with the original item with 23 teeth. The most popular clutch gear conversion cog is the version with 22 teeth, so enabling an improved acceleration through the gears, without expensive tuning measures, especially between 3rd and 4th gears. For VESPA T5 motors equipped with the MALOSSI 172cc cylinder kit, a clutch gear cog with 21 or 22 teeth has proved suitable. If the primary driven gear with 65 teeth (originating from the 200cc motor) is used in a 125-150cc motor the clutch gear cog from the 200 can also be employed in the smaller motor.

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