Optimize the performance of your transmission and secure the passage from your power to the ground thanks to aluminum Crown Holder Star Model. Specifically developed for mono-cried karts (Rotax Max, Iame X30, OK, OK-J, leisure karts) Equipped with a 50 mm axle, this pinion holder guarantees surgical strength, accuracy and reliability in all stroke configurations.

Cut in the mass by cNC machining peak, the STAR model stands out for its superb star structure with 6 branches (rays). This architectural design offers a perfect mechanical balance between maximum structural rigidity and absolute lightness, with a feather weight of only 277 grams on the scale. High-end black anodizing sustainably protects the corrosion part, chain wear and extreme mechanical stresses related to repeated accelerations. Thanks to its standardized distance dials, it ensures an immediate assembly and a rigorous alignment of your crown, drastically limiting the parasitic friction.

Technical characteristics:

• Model: Star (6-ray / branches)

• Material: High Quality CNC Machined Aluminum, Black Anodized Finish

• Inner diameter (axis): Ø 50 mm

• Ultra-light weight: 277 g (ideal for reducing the inertia of the back tree)

• Fixing center (wheelbasement): Ø 134 mm (holes for Ø 6.5 mm screws)

• Pinion / Crown centering diameter: Ø 116 mm

• Compatibility: Universal for all crowns (training trays) market standards

👨🔧- The trick in Michel (the corner of the expert)

* "Hi Ace Mechanics! The 6-ray star ring, it's really the centerpiece for a transmission that" sings "right on the track. In karting, if your crown holder is veiled or poorly centered, your chain will tend and Relaxing every tree trick. Result: You lose friction performance, you drink your motor gear, and you risk derailing miserably on a vibrator !

My trick of old circuits wolf to install your 50 mm star model: crown cross tightening !

When you attach your plastic or ergal crown on the 6 branches of the star holder, do not tighten 6.5 mm screws after each other by turning in circles. Install all screws in hand, approach them, then tighten it firmly on the cross (diagonally). This allows the crown to focus perfectly on the shoulder of 116 mm without getting through.

Before blocking the crown door flange on your 50mm shaft with the BTR key, use a chain aligner (laser or strip) to check the perfect parallelism with the pinion of your clutch. Once aligned, tighten the clamping screw of the platinum manually. Do not forget to put a small drop of chain lubricant after each session, and your transmission will turn like a Swiss clock! "*

📐 -The assembly & alignment guide: step by step

❓ - FAQ SEO (Frequently Asked Questions)

Q: Why prefer a 6-ray structure rather than a full crown carrier ?

A: The 6-ray design of the Star model makes it possible to avoid a maximum of superfluous material where the mechanical stresses are the weakest. This makes it possible to obtain a record weight of 277 g while maintaining a perfect structural rigidity under the motor tensile force, which reduces the rotation inertia of your rear train for better reminders.

Q: Is this crown carrier compatible with the crowns of all Kart brands (OTK, CZ, Elto ...) ?

A: Yes, absolutely. The wheelbase of the 134 mm mounting holes and the internal centering diameter of 116 mm correspond to the international standard used by the almost all the wreath manufacturers for mono-excitely karts (nylon / plastic wreaths or in equal aluminum).

Q: Are the crown fixing screws and the shaft key included ?

A: The STAR crown holder comes complete with its integrated clamping screw for blocking on the 50 mm axis. The mounting screws to hold the crown (Ø 6.5 mm screw) as well as the rear shaft key are not included and are sold separately in our screw rays and keys.