Blue Line M6x60mm intake manifold stud bolt pair (SKU 1100-1333) for 139QMB 50cc scooter engines — two steel double-ended M6x1.00 studs with dark phosphate finish, smooth shank, and rounded tips; 63mm overall length Blue Line M6x60mm intake manifold stud bolt pair (SKU 1100-1333) for 139QMB 50cc scooter engines — two steel double-ended M6x1.00 studs with dark phosphate finish, smooth shank, and rounded tips; 63mm overall length
Blue Line M6x60mm intake manifold stud bolt pair (SKU 1100-1333) for 139QMB 50cc scooter engines — two steel double-ended M6x1.00 studs with dark phosphate finish, smooth shank, and rounded tips; 63mm overall length

Blue Line

Blue Line M6x60mm Intake Manifold Stud Bolt Pair - 139QMB

SKU 1100-1333
$3.00
Shipping calculated at checkout.
Description

Pair of M6x60mm intake manifold stud bolts for 50cc scooters with 139QMB-based engines — two steel double-ended studs with M6x1.00 thread on both ends, smooth unthreaded shank, and rounded tips; dark phosphate finish. Used to mount the intake manifold to the cylinder head. Sold as a pair. SKU: 1100-1333 | MPN: 4789.

Key Features:

  • Steel double-ended intake manifold stud bolts — M6x1.00 thread, dark phosphate finish
  • Smooth unthreaded shank with rounded tips | 63mm overall length
  • Used to mount the intake manifold to the cylinder head on 139QMB-based 50cc engines
  • Confirmed fit: CSC Bella Classic 50, Nitro Sport 50, Pug 50, go, and go MAX
  • Fits all 139QMB-based 50cc/80cc engines | Sold as a pair | SKU: 1100-1333

Specifications:

  • Brand: Blue Line
  • SKU: 1100-1333 | MPN: 4789
  • Thread: M6x1.00
  • Overall length: 63mm
  • Finish: Dark phosphate
  • Quantity: 2 (pair)

Confirmed Fitment — Chicago Scooter Company (CSC):

Brand Model
CSC Bella Classic 50
CSC Nitro Sport 50
CSC Pug 50
CSC go
CSC go MAX

Universal 139QMB engine fitment — compatible engine codes:

Engine Code Engine Code Engine Code Engine Code
139QMA 139QMB 1P39QMB 1P39QMA-2
YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB
BN139QMB 147QMD Other QMA models Other QMB models

Don't see your engine listed? If the 50cc engine code includes "QM" or "FM", this bolt is likely compatible with your engine.
Product Diagrams
Features
  • Steel M6x1.00 intake manifold stud bolts — pair, dark phosphate finish (SKU: 1100-1333)
  • Double-ended stud: M6x1.00 thread on both ends | Smooth shank with rounded tips | 63mm OAL
  • Mounts intake manifold to cylinder head on 139QMB-based 50cc/80cc engines
  • Confirmed fit: CSC Bella Classic 50, Nitro Sport 50, Pug 50, go, and go MAX
  • Fits all 139QMB/QMA engine codes | Made in China | Brand: Blue Line
Specifications

Brand: Blue Line | SKU: 1100-1333 | MPN: 4789 | Thread: M6x1.00 | OAL: 63mm | Finish: Dark phosphate | Qty: 2 (pair) | Engine: 139QMB 50cc | Origin: China
Model Fitments

CSC Bella Classic 50 | CSC Nitro Sport 50 | CSC Pug 50 | CSC go | CSC go MAX | All 139QMB/QMA-based 50cc/80cc engines | Engine codes: QMA, QMB, QMD, FMA | M6x1.00 intake manifold stud bolt pair | SKU: 1100-1333
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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