| Top 80 Engine: Cylinder  Parts (Expanded Diagram) We would like to inform you that for production reasons, we have a new coupling design between the cylinder and the head. The new measurements make cylinders and heads from previous production runs incompatible.
 If you replace the cylinder or head of an engine produced before August 2025, the pair will be inseparable. It will be necessary to replace both the cylinder and the head at the same time.
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    | Top 80 Cylinder/Piston/Head/Plug Full Kit (new style) | 
  
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      New Design Includes:CylinderPistonPiston BearingWrist PinCirclipsCylinder GasketsHead O Ring Spark Plug NGK CR9EBNo Spark Plug Washer Needed Price: $329.00  
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    | Top 80 Cylinder Kit (new style) M13 | 
  
    |  | M13 Kit Includes:
 
      New CylinderPistonWrist PinPiston RingCirclipsCylinder GasketsHead O Ring Price: $298.00  
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    | Top 80 Cylinder Head (new style) M13/5 | 
  
    |  For use with NEW Cylinder
		 Please note: Old Head is not available any more. If you have a head that needs replacing, you will also need to get M13 Cylinder Kit (above) and Spark Plug CR9EB. Better yet is the Kit M13/5K above.
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      New DesignNo Spark Plug Washer NeededFor NGK CR9EBFor use with the NEW Cylinder ONLY! Price: $74.00  
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    | Top 80 Piston Kit M13/2 (22a) | 
  
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       See Diagram
 Unless the cylinder has been modified:
 (re-bored), size A should be selected.
 
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          M13/2 PistonPiston RingWrist PinCirclips
          Note: Pistons are sized A, B, C, D, F, G H; incrementally oversized.Please indicate size desired when orderingPrice: 110.00  
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    | Top 80 Cylinder Head Nuts, Washers & Spacers Kit M13/8 (6a, 7a, 8a, 9a) | 
  
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    | Top 80 Piston Ring M13/3 (20a) | 
  
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    | Top 80 Piston Bearing M13/4 (19a) | 
  
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    | Top 80 Piston Rod "Circlips" Springs M13/4A (18a) | 
  
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    | Top 80 Head O Ring M13/5A (11a) | 
  
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    | Top 80 Cylinder Gasket Kit M13/6 (15a) | 
  
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        Kit includes:0.20mm
 0.30mm
 0.40mm
 0.50mm
 0.60mm
Read This Price: $15.00  
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    | Top 80 Centering Pins, Cylinder 536-316 (12a) | 
  
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      For the CylinderPrice: $5.00    | 
  
    | Top 80 Cylinder Studs M13/7 (16a) | 
  
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    | Top 80 Crank Shaft M14 (33a) | 
  
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    | Crankcase Seals M14/2 (pair) (31a) | 
  
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      Price: $23.00 For Motors before Feb, 2014High Speed RubberSize: 18x28x7 mm | 
  
    | Crankcase Seals M14/2F (pair) (31a) | 
  
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      Price: $27.00 For Motors after Feb, 2014H.S. Rubber with Teflon TipsNew Size: 18x32x7 mm | 
  
    | Top 80 Crank Shaft Bearings, set M14/1 (32a) | 
  
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    | Crank Case Bolts M5x40mm, set of 6 (29a) | 
  
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      Set of Six BoltsM5x40mmPrice: $16.00  
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