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Naraku Variator Boss Shim 21mm Set (Aprilia, Piaggio, Vespa 50)

Naraku Variator Boss Shim 21mm Set (Aprilia, Piaggio, Vespa 50)

Description: Naraku Variator Boss 21mm Shim Set for Aprilia, Piaggio 50, Vespa 2-stroke engines. Variator control shims can be installed between the drive faces to lengthen the boss if your variator does not open fully to allow maximum belt travel. Also fits stock variators on Aprilia Mojito, SR50 (Piaggio), and Scarabeo 50, Benelli Pepe (Morini), Derbi Atlantis (Piaggio), Hyosung Cab 50, Piaggio Fly 50, Liberty and Zip 2, TGB 101s, 203, 303R and Laser 50, Vespa ET2, LX50, Primavera 50 and Modern S.

Installation: 1. Slack the belt by opening the CVT clutch gives belt slack to the variator side. 2. Then install the variator drive face while lifting the slack belt further away from the center boss if done properly should not see any splines between variator drive face slop-side and boss flat-side. Should be flushed together. 3. Then install the existing variator fan, washer, and hand-tight nut. 4. Finally, apply blue Loctitetorque nut to 30-35ft-lbs. For reassurance please consult your manufacturer's variator torque specs.


Includes the following Boss shims.

•    10x Variator Boss Shim ID: 15mm / OD: 21mm / Thick 0.1mm
•    10x Variator Boss Shim ID: 15mm / OD: 21mm / Thick 0.2mm  
•    10x Variator Boss Shim ID: 15mm / OD: 21mm / Thick 0.5mm
•    Made in Taiwan
•    Fit Variator Housing95mm Weights: 19x15mmSlides: 3 Boss: 21mm
•    Fit Belt Size: 748-18-28 (Fit Aprilia ONLY)
•    Fit Belt Size: 
788-18.1-28 (Fit Piaggio ONLY)
•    Fit Belt Size: 738-18.5-28 (Fit Vespa ONLY)
•    Fit Aprilia 49/50cc
•    Fit Piaggio 49/50cc
•    Fit Vespa 49/50cc

Supported Models: Aprilia SR50 Di-Tech LC (2003-13), Aprilia SR50 R Factory Di-Tech LC (2003-13), Gilera Runner 50 Purejet (2005+), Morini 50, Piaggio NRG 50 Purejet LC (2005+), Vespa ET2, Various unlisted makes/models

Item Weight & Product Dimensions:
•    0.02 pounds | 0.826" (OD) x 0.59" (ID) x 0.314" (H)

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Naraku Variator Boss Shim 21mm Set (Aprilia, Piaggio, Vespa 50)
  • Stock: 38
  • Part #: NK800.14
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