Postage free from 99€ (DE)
High customer satisfaction
DE | €
- Vespa Classic
- Primary pinion with cone -CRIMAZ-22/63 (2.86) for primary 63 Z helical teeth- Vespa V50, PV125, ET3, PK50, PK80, PK125 - 22 teeth (helical teeth)
The CRIMAZ 22-tooth primary pinion is the reinforced solution for performance-enhanced Vespa Smallframe engines with a primary ratio of 22/63 (ET3, Primavera, PK125). Instead of working with a key and nut as originally, the pinion is clamped to the crankshaft with a cone - this allows significantly more power to be transmitted safely without the pinion moving on the shaft or the key becoming a weak point.
The pinion has helical teeth and is therefore specially designed for the original 22/63 primary gear ratio of the Vespa ET3, Primavera and PK125. In conjunction with the matching primary gear, the transmission remains quiet in operation and offers the familiar characteristics - ideal for powerful road engines that should remain visually and acoustically in the original environment, but deliver significantly more torque and power.
The heart of the CRIMAZ concept is the conical clamping on the crankshaft. The primary pinion is not only fixed via the feather key, but is also clamped onto the shaft via the cone in a form-fit and force-fit manner. This significantly increases the transmittable force and prevents typical damage in the keyway and crankshaft stub area.
CRIMAZ recommends tightening the primary pinion to 60-70 Nm. The recommended tightening torque is lasered directly onto the pinion and can therefore be checked at any time.
The CRIMAZ primary sprockets for Vespa Smallframe can be combined with primary sprockets from various manufacturers. Tested combinations include, among others:
This means that the pinion can be flexibly integrated into existing or newly constructed primary systems as long as the helical 22/63 base is retained.
CRIMAZ has integrated three threaded holes in the pinion for practical use. The appropriate CRIMAZ puller can be screwed into these holes to remove the sprocket from the cone in a controlled manner and without force. This protects the crankshaft and makes servicing easier when changing the gear ratio or overhauling the engine.
| Advantage | Advantage Description |
|---|---|
| ✅ More power transmission via cone | Cone clamping relieves the key and crankshaft stub, ideal for powerful engines |
| ✅ Helical gearing for ET3/Primavera 22/63 | Quiet running and original transmission characteristics with significantly higher stability |
| ✅ Clearly defined tightening torque | 60-70 Nm recommended, lasered directly onto the sprocket |
| ✅ Compatible with common primary gears | Tested and combinable with gears from several manufacturers |
| ✅ Service-friendly disassembly | Three threads for CRIMAZ pullers facilitate removal from the cone |
| ✅ Developed for tuned engines | Designed for high torques and powerful smallframe setups |
The CRIMAZ 22-tooth helical primary pinion is the logical upgrade for Vespa Smallframe engines with 22/63 ET3/Primavera primaries that exceed standard performance. Cone clamping, clearly defined tightening torque and tested compatibility with primary gears from various manufacturers make it a stable basis for performance-oriented road and racing setups.
