101 Octane Crankshaft With 22t Sprocket For 139qmb/qma Gy6
101 Octane Crankshaft With 22t Sprocket For 139qmb/qma Gy6
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Estimated delivery: Feb 04 - Feb 08
About this product
About this product
The 101 Octane Crankshaft is a high-quality aftermarket replacement designed for 50/90cc 4-stroke engines, specifically the GY6 50 (139QMB/QMA) series. This crankshaft comes pre-pressed with main bearings and a connecting rod for ease of installation.
Description
This 101 Octane crankshaft is engineered as a direct replacement for GY6 engines. A key feature is the 22-tooth oil pump drive sprocket, which is essential for newer GY6 engine models, including Rex models. Ensure compatibility by counting the teeth on your existing oil pump drive cog before ordering. If you have an older 16-tooth variant, this crankshaft can still be installed, provided you also install oil pump BT14782 and oil pump drive cog BT14783. With proper installation, this crankshaft will restore your engine's performance and reliability. Get the 101 Octane Crankshaft for your 139QMB/QMA engine today.
Features & highlights
- Direct replacement for GY6 50 (139QMB/QMA) engines.
- Pre-pressed with main bearings and connecting rod for straightforward installation.
- Features a 22-tooth oil pump drive sprocket, compatible with newer GY6 models.
- Can replace 16-tooth variants with additional oil pump and drive cog installation.
- Restores engine performance and reliability.
Technical specifications
- Brand: 101 Octane
- Product Name: Crankshaft
- Compatibility: 50/90cc 4-stroke GY6 50 (139QMB/QMA) engines
- Oil Pump Drive Sprocket: 22-tooth
Important to know
If your engine uses a 16-tooth oil pump drive, you will also need to purchase and install oil pump BT14782 and oil pump drive cog BT14783 to use this crankshaft.
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Parts Denmark Info
Parts Denmark Info
Parts Denmark is a new webshop based in Denmark. We have a physical location you can visit (No showroom yet), and we have both email and phone support in our opening hours.
Our company info is:
Parts Denmark ApS
VAT: DK45974758
Dam Holme 11
3660 Stenløse, Denmark
hello@partsdenmark.com
+45 222 333 29
Best regards,
William Svendsen & Martin Høyer (Owners)
Specifications
101 OCTANE
BT7001-22
Crankshaft
Each


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.

