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You are here: Home > Parts Department > Scooter Parts > Parts by Engine Type > 50cc, QMB139 4-Stroke Scooter Engine Parts > Drive Starter (Fig. 5)
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QMB50001-669
Fig. 5 / Part No. 01
Belt 669-18-30 (Short Version)
Specifications:
Markings: 669-18-30
Length: 669mm
Width: 18mm
Angle: 30 Degree
Our Price: $29.95
QMB50001-729
Fig. 5 / Part No. 01
Belt 729-17.5-30 (Long Version)
Specifications:
Markings: 729-17.5-30
Length: 729mm
Width: 17.5mm
Angle: 30 Degree
Our Price: $32.95
QMB50004
Fig. 5 / Part No. 04
Plate Drive Gear
Specifications:
Outer Diameter: 33.5mm
Inner Shaft Hole Diameter: 14mm
Extended 3 Points Length: 9mm
Our Price: $4.99
QMB50005
Fig. 5 / Part No. 05
Belt Cooling Fan
Specifications:
Outer Diameter: 89mm
Inner Diameter: 38.5mm
Our Price: $4.99
QMB50006
Fig. 5 / Part No. 06
Drive Gear Face
Specifications:
Outer Diameter: 113.5mm (longest point)
Inner Diameter: 14mm
Our Price: $7.49
QMB50007
Fig. 5 / Part No. 07
Drive Face Spacer/Shaft
Specifications:
Length: 38mm
Outer Diameter: 20mm
Inner Diameter: 14mm
Our Price: $2.49
QMB50008
Fig. 5 / Part No. 08
Front Variator Pulley
Specifications:
Outer Diameter: 87.5mm
Inner Hole Diameter: 20mm
Slot For Roller Weight: 13.5mm
(Uses 16mm x 13mm Roller Weight)
Our Price: $19.95
QMB50009
Fig. 5 / Part No. 09
Roller Weights 16mm x 13mm / 8.5g
Specifications:
Diameter: 16mm
Width: 13mm
Weight: 8.5 g
Our Price: $6.95
QMB50010
Fig. 5 / Part No. 10
Variator Back Plate
Specifications:
Outer Diameter: 74.5mm
Inner Diameter: 14mm
Our Price: $3.95
QMB50011
Fig. 5 / Part No. 11
Variator Back Plate Back Slides
Sold as Set of 3

Specifications:
Groove Width: 10mm
Groove Depth: 8mm
Our Price: $2.95
QMBTX870015
Variator - QMB139 50cc (Complete Assembly)
CVT variator assembly for the street legal scooters with the 139QMB 50cc engine.

Includes:
Roller Weights 8.5 gram
Our Price: $49.95