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Cylinder Kit, 80cc Big Bore for 50cc 4-Stroke 139QMB Scooters

List Price: $199.00
Sale Price: $129.99
In Stock
Item Number: HP-CYKT-139QMB-48M
Manufacturer: OEM

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Performance 80cc Upgrade Cylinder Kit for 50cc 4-Stroke 139QMB Scooters


INCLUDES:
  • Cylinder Head
  • Cylinder Block
  • Piston (48mm)
  • Piston Rings
  • Wrist Pin
  • Circlips
  • Gaskets
  • Valves

COMPATIBILITY:
  • BMS - Apache 50 4T, Heritage 50 4T
  • Diamo - Classic 50 4T
  • Gilera - Capri 50 4T, Ciclone 50 4T
  • Lance - Charming 50 4T, GTR 50 4T
  • PGO / Genuine - Buddy 50 4T
  • Roketa - Bahama 50 4T, Maui 50 4T, Sicily 50 4T
  • Tank - Urban 50 4T, Sporty 50 4T, Viaggio 50 4T
  • Many Other 50cc 139QMB Based Engines
  • **This will not work on the QJ models

Upgrade 4-stroke cylinder kit (actually 80cc, 48mm) works on Kymco, Schwinn, QLink, Diamo, Avanti, Geely, Tank, Verucci, Roketa, Meitian and most scooters with GY6 139QMB 4T engines.

Also do not forget your clutch, roller weights, and belt to use this new find power to better take off and no slip with Kevlar belts. Good size for roller weights for bottom end and not losing top end is 5 - 6 gram weights depending on rider's weight.

**NOTE: There are two versions of this kit. It either comes with a 64mm or 69mm valve kit. Also, you may need to bore your engine to complete the installation. Please verify first before placing an order.

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Product Reviews

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(3 Ratings, 1 Review) Average Rating:
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Good Power
(Unknown) 2/7/2009 10:48 AM
This kit was exactly what I needed. I am able to do 50 mph on my 50cc scooter. This was possible because I replaced my stock cdi, coil, belt, weights, and clutch. The price wasn't so bad compared to what others were retailing them for. Thanks guys.
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