VERTEX TOP END REBUILD KIT KTM 85SX 18-25 / HUSQVARNA TC85 18-25 / GASGAS MC85 21-25
KIT INCLUDES
- Piston
- Piston Pin
- Circlips
- Rings
- Top-End Bearing
- Top-End Gasket Kit
PISTON SPECIFICATIONS
A PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.94mm
B PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.95mm
C PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.96mm
D PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.97mm
VERTEX PISTON KIT
As the OE supplier of two-stroke pistons to KTM, Vertex pistons has an outstanding reputation for quality and performance. Each gravity cast piston is created with only premium aluminium alloys utilising a 12-21% silicon content. The silicon content in Vertex pistons is crucial to the quality of the piston. Silicon is critical in decreasing thermal expansion which, when an engine reaches normal operating temperatures, can change the geometry of the piston. Controlling this expansion means that a Vertex piston can be run at tighter tolerances for more power, less noise and a longer lifespan of the piston. Plus, the silicon content decreases wear on the piston skirt which also aids in the life of the piston. In addition to the silicon, each Vertex piston utilises a unique Molybdenum Disulphide (MOS2) coating which aids in the break-in process and reduces overall wear.
VERTEX GASKET KIT
Produced in the U.S.A. with the latest materials and technology in gasket production to Vertex specifications. Vertex gaskets ensure long-lasting performance and leak prevention for your rebuild needs. This kit sets include the head, base, and exhaust gaskets, valve seals, o-rings and other gaskets to complete a top-end rebuild.
Note: Please ensure you have measured and selected the correct size piston.
BIKE FITMENT
GASGAS
- MC 85 (BW) 2021-2025
- MC 85 (SW) 2022-2025
HUSQVARNA
- TC85 BW 2018-2025
- TC85 SW 2018-2025
KTM
- 85 SX 2018-2025
- 85 SX BIG WHEEL 2018-2025
Product Information
Product Information
Shipping & Returns
Shipping & Returns





VERTEX TOP END REBUILD KIT KTM 85SX 18-25 / HUSQVARNA TC85 18-25 / GASGAS MC85 21-25
VERTEX TOP END REBUILD KIT KTM 85SX 18-25 / HUSQVARNA TC85 18-25 / GASGAS MC85 21-25
KIT INCLUDES
- Piston
- Piston Pin
- Circlips
- Rings
- Top-End Bearing
- Top-End Gasket Kit
PISTON SPECIFICATIONS
A PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.94mm
B PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.95mm
C PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.96mm
D PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.97mm
VERTEX PISTON KIT
As the OE supplier of two-stroke pistons to KTM, Vertex pistons has an outstanding reputation for quality and performance. Each gravity cast piston is created with only premium aluminium alloys utilising a 12-21% silicon content. The silicon content in Vertex pistons is crucial to the quality of the piston. Silicon is critical in decreasing thermal expansion which, when an engine reaches normal operating temperatures, can change the geometry of the piston. Controlling this expansion means that a Vertex piston can be run at tighter tolerances for more power, less noise and a longer lifespan of the piston. Plus, the silicon content decreases wear on the piston skirt which also aids in the life of the piston. In addition to the silicon, each Vertex piston utilises a unique Molybdenum Disulphide (MOS2) coating which aids in the break-in process and reduces overall wear.
VERTEX GASKET KIT
Produced in the U.S.A. with the latest materials and technology in gasket production to Vertex specifications. Vertex gaskets ensure long-lasting performance and leak prevention for your rebuild needs. This kit sets include the head, base, and exhaust gaskets, valve seals, o-rings and other gaskets to complete a top-end rebuild.
Note: Please ensure you have measured and selected the correct size piston.
BIKE FITMENT
GASGAS
- MC 85 (BW) 2021-2025
- MC 85 (SW) 2022-2025
HUSQVARNA
- TC85 BW 2018-2025
- TC85 SW 2018-2025
KTM
- 85 SX 2018-2025
- 85 SX BIG WHEEL 2018-2025
Original: $129.87
-65%$129.87
$45.45Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
KIT INCLUDES
- Piston
- Piston Pin
- Circlips
- Rings
- Top-End Bearing
- Top-End Gasket Kit
PISTON SPECIFICATIONS
A PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.94mm
B PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.95mm
C PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.96mm
D PISTON:
- Standard Compression
- Cylinder Diameter: 47mm
- Displacement: 85cc
- Piston Diameter: 46.97mm
VERTEX PISTON KIT
As the OE supplier of two-stroke pistons to KTM, Vertex pistons has an outstanding reputation for quality and performance. Each gravity cast piston is created with only premium aluminium alloys utilising a 12-21% silicon content. The silicon content in Vertex pistons is crucial to the quality of the piston. Silicon is critical in decreasing thermal expansion which, when an engine reaches normal operating temperatures, can change the geometry of the piston. Controlling this expansion means that a Vertex piston can be run at tighter tolerances for more power, less noise and a longer lifespan of the piston. Plus, the silicon content decreases wear on the piston skirt which also aids in the life of the piston. In addition to the silicon, each Vertex piston utilises a unique Molybdenum Disulphide (MOS2) coating which aids in the break-in process and reduces overall wear.
VERTEX GASKET KIT
Produced in the U.S.A. with the latest materials and technology in gasket production to Vertex specifications. Vertex gaskets ensure long-lasting performance and leak prevention for your rebuild needs. This kit sets include the head, base, and exhaust gaskets, valve seals, o-rings and other gaskets to complete a top-end rebuild.
Note: Please ensure you have measured and selected the correct size piston.
BIKE FITMENT
GASGAS
- MC 85 (BW) 2021-2025
- MC 85 (SW) 2022-2025
HUSQVARNA
- TC85 BW 2018-2025
- TC85 SW 2018-2025
KTM
- 85 SX 2018-2025
- 85 SX BIG WHEEL 2018-2025














