Universal Parts QMB139 Cylinder & Head Kit – 64mm Valves
Universal Parts QMB139 Cylinder & Head Kit – 64mm Valves
Price range: $91.28 through $91.49
*Note: Free shipping to U.S. mainland (excludes AK, HI, and territories)
Orders placed by 1pm EST on weekdays ship the same day.
Product Details
Description
Universal Parts QMB139 Cylinder & Head Kit - 64mm Valves is a variable product with selectable options. Choose the correct option before adding to cart.
Product Details
ScootsUSA offers the best universal parts qmb139 cylinder head kit 64mm valves at great prices. Explore our catalog for top-quality parts and fast shipping! 50cc QMB139 4-stroke Cylinder and Head Kit. Choose from 39mm, 47mm or 50mm bore in the Drop Down Box. 47mm Bore Upgrades your Scooter to 72cc! 50mm Bore Upgrades your Scooter to 81.3cc! Kit includes complete cylinder head, cylinder, piston, rings, piston pin, cir clips, head gasket, and base gasket. Please see our Warranty & Returns Policy. *You may need to modify your engine case to accommodate the larger cylinder. Cylinder Bore: Choose from 39mm, 47mm or 50mm Cylinder Sleeve Outer Diameter: 45mm (39mm bore) / 52.8mm (47mm bore) / 53.95mm (50mm bore) Wrist Pin Diameter: 13mm Total Piston Height: 34.4mm Compression Height (from center of wrist pin hole to top edge of piston): 17.25mm Intake and Exhaust Valve Length: 64mm Non-Emissions Head SUPPORTED MODELS: QMB139 50cc/49cc
Ordering Notes
Use the dropdown options on this product page to select the correct version, color, size, or fitment before ordering.
Related Categories
Additional information
| Weight | 4.65 lbs |
|---|---|
| Dimensions | 6 × 4 × 2.1 in |
| Size | 39, 47, 50 |
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 49cc, 50cc, QMB139, 4-Stroke
- Engine Code: QMB139
- Fitment Notes: Universal Fit
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a QMB139 engine?
A: This SKU is listed as compatible with QMB139 engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Is this for 49cc scooters?
A: This SKU is listed with 49cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 4.65 lbs |
|---|---|
| Dimensions | 6 × 4 × 2.1 in |
| Size | 39, 47, 50 |
