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- Upgrades to 72cc
- Cylinder Bore: 47mm
- Cylinder Sleeve Outer Diameter: 52.7mm
- Wrist Pin Diameter: 13mm
- Total Piston Height: 34.4mm
- Compression Height (from center of wrist pin hole to top edge of piston): 17.25mm
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- Piston Outer Diameter: 47mm
- Total Piston Height: 34.4mm
- Compression Height: 17.25mm
- Wrist Pin Diameter: 13mm
- Wrist Pin Length: 36.8mm
- Includes Piston, Pin, Rings & Circlips
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- 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
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- Inner Diameter: 26mm
- Outer Diameter: 42mm
- Thickness: 7mm
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- Inner Diameter: 17mm
- Outer Diameter: 30mm
- Thickness: 7mm
-
- Thread Size: 14mm
- Reach: 9.5mm (3/8 inch)
- Hex Size: 19mm (3/4 inch)
- Gap: 0.7mm (.028 inch)
- Heat Range: 7
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- NGK3922
- Thread Size: 14mm
- Reach: 12.7mm (1/2 inch)
- Hex Size: 20.6mm (13/16 inch)
- Gap: 0.7mm (.028 inch)
- Heat Range: 6
-
- NGK7784
- Thread Size: 10mm
- Reach: 19mm (3/4 inch)
- Hex Size: 16mm (5/8 inch)
- Gap: 0.8mm (.031 inch)
- Heat Range: 8
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- NGK5129
- Matches D7RTC “Torch” brand spark plug
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- NGK96652
- Thread Size: 8mm
- Reach: 19mm (3/4 inch)
- Hex Size: 13mm (1/2 inch)
- Electrode Diameter: 0.8mm
- Gap: 0.7-0.8mm (.031 inch)
- Heat Range: 9
-
- Thread Size: 14mm
- Reach: 12.7mm (1/2 inch)
- Hex Size: 20.6mm (13/16 inch)
- Gap: 0.7mm (.028 inch)
- Heat Range: 8
-
- NGK7502
- Thread Size: 10mm
- Reach: 19mm (3/4 inch)
- Hex Size: 16mm (5/8 inch)
- Gap: 0.9mm (.035 inch)
- Heat Range: 9
-
- Thread Size: 10mm
- Reach: 19mm (3/4 inch)
- Hex Size: 16mm (5/8 inch)
- Gap: 0.8mm (.031 inch)
- Heat Range: 7
-
- NGK5534
- Thread Size: 14mm
- Reach: 19mm (3/4 inch)
- Hex Size: 20.6mm (13/16 inch)
- Gap: 0.8mm (.032 inch)
- Heat Range: 7
-
- Thread Size: 14mm
- Reach: 19mm (3/4 inch)
- Hex Size: 20.6mm (13/16 inch)
- Electrode Diameter: 0.6mm
- Gap: 0.8mm (.031 inch)
- Heat Range: 6
-
- NGK7734
- Thread Size: 14mm
- Reach: 19mm (3/4 inch)
- Hex Size: 20.6mm (13/16 inch)
- Gap: 0.9mm (.036 inch)
- Heat Range: 5
