Universal Parts
Universal Parts 43mm TB60 60cc Big Bore Kit - Suzuki TB50
Description
This Universal Parts 43mm TB60 big bore kit adds stronger low-end torque and mid-range acceleration to compatible Suzuki-style TB50 / 1DE41QMB 50cc two-stroke scooter engines. Its approximately 60cc displacement gives your off-road build more pulling power. At the same time, the finned cylinder, aluminum piston, rings, wrist pin, circlips, and two gaskets bring the core top-end components together in one kit.
Key Features
- 43mm big bore: Increases the bore from the factory 41mm to approximately 60cc displacement.
- Stronger acceleration: Added displacement improves low-end torque and mid-range pulling power.
- Optimized port timing: Revised intake and exhaust ports support two-stroke scavenging efficiency.
- Aluminum piston: Lightweight 43mm piston uses a 10mm wrist pin.
- Top-end components included: Cylinder, piston, two rings, wrist pin, two circlips, and two gaskets.
Technical Specifications
- Brand: Universal Parts
- Engine platform: Suzuki-style TB50 / 1DE41QMB, two-stroke
- Displacement: Approximately 60cc
- Cylinder bore: 43mm
- Overall cylinder height: 81.5mm
- Finned cylinder section height: 51mm
- Lower cylinder spigot diameter: 49mm
- Diagonal mounting-hole spacing: 65mm
- Piston pin diameter: 10mm
- Piston compression height: 21.5mm
- Part number: 169-185
- Manufacturer part number: 2381
Compatibility
| Make | Application | Fitment requirement |
|---|---|---|
| Suzuki | Select 50cc two-stroke scooter models | Matching TB50 / 1DE41QMB platform and 10mm piston pin |
| Qingqi | QM50QT-B2, Mulan, and compatible TB50 clones | Matching TB50 / 1DE41QMB platform and 10mm piston pin |
| Geely | Select 50cc two-stroke models | 1DE41QMB engine and 10mm piston pin |
Verify the engine code, 10mm piston pin, cylinder spigot diameter, and mounting-hole spacing before ordering. This TB50-style kit does not fit standard Yamaha Jog/Minarelli or Morini engines.
Installation & Tuning
Increase the carburetor main jet size and tune fueling for the larger displacement. Factory jetting can create a lean condition that may damage the engine or cause seizure.
This product is intended for off-road use only. This product is not intended for use on public roads or land.
Product Diagrams
Features
Specifications
Brand: Universal Parts; Part number: 169-185; MPN: 2381; Engine: TB50 / 1DE41QMB two-stroke; Bore: 43mm; Displacement: approximately 60cc; Overall cylinder height: 81.5mm; Finned section height: 51mm; Spigot diameter: 49mm; Diagonal mounting-hole spacing: 65mm; Piston pin: 10mm; Piston compression height: 21.5mm
Model Fitments
Suzuki: select TB50 / 1DE41QMB 50cc two-stroke scooters; Qingqi: QM50QT-B2, Mulan, compatible TB50 clones; Geely: select 1DE41QMB 50cc two-stroke scooters; Requires 10mm piston pin and matching cylinder dimensions; Not for standard Yamaha Jog/Minarelli or Morini engines
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
