Doppler Endurance Crankshaft – AM6 – 39 mm Stroke

Building a serious AM6 engine to handle 70, 80 cc big-bore kits and beyond? The Doppler Endurance crankshaft with 39 mm stroke is a benchmark choice. Its edge? Precise balancing and a reinforced build that lasts under high-demand use.

Technical specifications:

• Stroke: 39 mm
• Pin diameter: 20 mm each side (bearings 6204)
• H-section conrod
• Full flyweights
• Includes needle bearing cage 12x17x15 mm

Benefits:

• 📈 39 mm stroke delivers explosive power delivery with 70, 80 cc+ kits
• 🛡️ Reinforced build handles the stress of big-bore configurations without any issues
• 🔧 H-rod and full flyweights for precise, long-lasting balance
• ⚙️ Comes with needle bearing cage, drop it straight into your AM6

Note: Compatible with AM6 (Minarelli AM6) engines. Check compatibility with your cylinder kit before ordering.