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G- Rocker Arm 69mm 2V Assembly (139QMB)

G- Rocker Arm 69mm 2V Assembly (139QMB)
G- Rocker Arm 69mm 2V Assembly (139QMB)
G- Rocker Arm 69mm 2V Assembly (139QMB)
G- Rocker Arm 69mm 2V Assembly (139QMB)

Description: Rocker Arm 69mm 2-Valve Assembly for 50mm stud spacing 139QMB. Fit 69mm height cylinder head only. Will not work for 64mm cylinder head (see rocker arm 64mm 2V set Part# 151-101).

NOTE: Use a feeler gauge to check the gap and assure a fair gauge grip at 0.004 for the intake-valve-to-tappet and .005 for exhaust-valve-to-tappet. For reassurance please consult your manufacturer cylinder valve adjustments.


Include the following Rocker arm assembly.

•    1x Rocker Arm Holder L: 66mm / W: 66mm / H: 26mm / Holes: 7.4<9mm / Space: 50mm
•    1x Shaft Inlet L: 51.3mm / OD: 8.8<12.9mm / ID: M5
•    1x Shaft Outlet L: 43.5mm / OD: 10mm / ID: M5
•    2x Rocker Arms L: 55.5mm / W: 22.2mm / H: 18.6mm
•    2x Tappets L: 18.53mm / OD: M5x0.5mm
•    2x Nuts L: 4.2mm / ID: M5x0.5mm / OD: 9mm
•    Fit Feeler Gauge: .004in / .005in / Socket: 9mm
•    Fit Cylinder Studs: 168mm 176mm / Nuts: M7 / Washers: M7 / Side Bolts: M6 / Socket: 8mm-10mm
•    Fit 50mm Stud Spacing /Diagonal 70.5mm

•    Fit Cylinder Head (valve height): 69mm 2V
•    Fit Dowel Pin Set (
•    Fit QMB 49/50cc+

Supported Models: 139QMB 49cc-50cc engines, Baja SC50, Boreem (BMS) 50, Filly 50, Kymco 50, Panterra 50, Qingqi 50, QLink 50, Roketa 50, SUNL 50, SYM 50, Tank 50, TaoTao 50, and virtually any other scooter engine with these measurements.

Item Weight & Product Dimensions:
•    0.462 pounds | 3.838" (L) x 2.598" (W) x 1.023" (H)

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G- Rocker Arm 69mm 2V Assembly (139QMB)
  • Stock: 37
  • Part #: 151-282
Sold: 4
Views: 3322
Price in reward points: 20