This front pulley assembly is a factory replacement for the Aerco belt drive kit specified for the unit-construction Triumph 650 models originally equipped with a duplex primary drive chain. Compatible with our TBS-BELT02 and TBS-BELT03 belt drive kits.
The pulley is pre-assembled and designed to fit the 25mm belt. Measured depth is 1.0855″, including the shoulder. Genuine Aerco spares are made in the UK.
The pulley is splined to fit over the corresponding splines on the drive-side end of the crankshaft. When the crankshaft is rotating, the pulley transmits power to the clutch drum via the belt, comprising the primary drive system.
The stator, magnetic rotor, and original chain-driving engine sprocket must be removed to allow installation of the pulley. The pulley fits onto the crankshaft with the belt retaining shoulder facing outwards.
The product images shown are for illustrative purposes only and may not be an exact representation of the product received. Manufacturers occasionally make minor cosmetic changes to items, such as color, finish, label, or design. These changes do not impact the item’s function or compatibility. Please contact us if you have specific concerns regarding appearance.
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