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Naraku
Article no.: NK900.21

Variator Naraku Performance, incl. weights (5.8g / 6.3g) and torque spring, GY6

Sorry, this Item has been Discontinued

This product is no longer being manufactured, so unfortunately we can no longer offer it.

However, we would like to help you find an alternative. Please take a look at other products within the same category or contact us so we can help you with selecting the right product.

Description

The NARAKU HS-High Speed vario is an evolution of one of the most successful varios for 4-stroke vehicles. The roller ramp design results in a maximum of torque and top speed. The key to a good variator is its ability to keep the engine at constantly high rpm over a wide range of vehicle speeds, which makes the HS variator one of the best ones for 4-stroke engines. Even other renowned manufacturers find this a hard nut to crack.

Another advantage for tuners without much experience is the fact that the NARAKU HS variators come already pre-adjusted.

This version comes ready to install for all 47mm and 51mm NARAKU cylinder kits together with the supplied torque spring. 47mm kits should be used with 5.8g rollers and 51mm kits with 6.3g rollers. If additional tuning parts are used, a new set up may be required.

Included in the scope of supply are the complete variator, open variator bushing with speed control washer, a fitting torque spring and 2 sets of variator rollers (16 x 13mm) suitable for 47mm and 51mm cylinder kits.
Questions about the product
 
 
Notes and Safety

scooter CVT

Modern scooters are equipped with a continuously variable transmission, the so-called CVT, also called variator.

CVT Parts:

  • Front pulley, movable. It contains the variator weights and has a special shape with an inclined surface to allow the V-belt to move freely up and down.
  • Ramp plate: Holds the weights in place.
  • Variator sleeve: Serves as a bearing for the variator, which moves axially back and forth, i.e., opens and closes.
  • CVT roller weights: Adjustment weights that play a critical role in function and performance.

original, Sport and Oversize CVTs

  • Original: Original or OEM quality CVTs are equipped with a restrictor to limit the speed to 45km/h. There are riders who remove the restrictor to derestrict their scooter and unleash the full performance without restrictions.
  • Sport: Sport CVTs are lighter than the original and are characterized by special angles and a special coating, which increases the top speed, but especially acceleration.
  • Oversize: Based on the same principle as the Sport CVT, but has larger dimensions. With an oversize / overrange vario, the performance of the scooter can be increased even further.

You should also always replace the V-belt when replacing the CVT or go for a complete CVT kit.

How to install a CVT transmission ?

Technical details
Variator Naraku Performance, incl. weights (5.8g / 6.3g) and torque spring, GY6
Article no.NK900.21
Weight0,55 kg
BrandNaraku
Product typeCVT
Roller size16 x 13 mm
Roller weight5,5 gr

Spare Parts

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