Used OEM BMW F800 Crankshaft + Rods + Main Bearings 2006-2018 | Builder Core

📦 What's In The Box

• Crankshaft × 1: With factory timing gear intact.
• Connecting rods × 2: Both rods with caps included.
• Main bearing shells × 8: Complete set of 4 pairs — ready for Plastigauge clearance check before reuse, or as a reference set when sourcing new bearings.

Note: Balance shaft is NOT included with this listing. If you also need the balance shaft, please check our other F800 crankshaft listing.

⚠️ Honest Condition Disclosure — Read Carefully

• Source: Removed from a running BMW F-series engine. The engine was operational at the time of disassembly.
• Visual Condition: Main bearing journals and rod journals appear bright and clean with no visible scoring or surface defects. Splines, threads, and timing gear teeth intact.
• What We Have NOT Done: No precision measurements have been taken. Journal roundness, runout on V-blocks, and rod weight matching have NOT been verified.
• Mileage: Unknown — we cannot verify service history.
• This Is Not a Reconditioned Crankshaft: It is a structurally complete core that needs professional measurement and (recommended) fresh bearings before it goes back into an engine.

🔧 Who This Is For

• BMW specialist shops rebuilding F-series bottom ends with in-house measurement capability.
• Experienced home rebuilders with access to micrometers, dial bore gauges, V-blocks, and a precision scale.
• Donor engine projects where the buyer plans to send the crank out for inspection and polishing before reuse.
• NOT FOR: Direct bolt-in installation. Anyone expecting a measured, reconditioned, ready-to-install crank should look elsewhere.

Attribute	Specifications
Current OEM Part Number	21218537774 (21 21 8 537 774)
Supersedes	11217702432
Compatibility	F650 GS (2007-2012), F700 GS (2012-2017), F800 GS (2006-2018), F800 GS Adventure (2013-2017), F800 GT (2011-2018), F800 R (2005-2018), F800 S (2004-2010), F800 ST (2004-2012)
Engine	798cc Parallel Twin (BMW K7x platform)
Condition	Used, AS-IS. Removed from running engine. Journals visually clean, splines intact. NOT measured.
Components Included	Crankshaft × 1 (with timing gear), Connecting rods × 2 with rod caps, Main bearing shells × 8 (4 pairs)
NOT Included	Balance shaft, crankshaft seals, woodruff keys, rod bolts (new bolts recommended), thrust washers
Country of Origin	Germany (Genuine BMW OEM)

🔴 Required Before Installation — Professional Measurement Mandatory: Before installing, a qualified machinist MUST verify: (1) main journal diameter and roundness against BMW service manual spec, (2) rod journal diameter and roundness, (3) crankshaft runout on V-blocks, (4) rod weight matching, (5) rod small-end and big-end bore condition. Install with new rod bolts (torque-to-yield), new crankshaft seals, and verify all bearing clearances with Plastigauge or equivalent.

🔴 Final Sale / AS-IS Terms: This crankshaft assembly is sold as a builder's core. Surface inspection only — no measurements have been taken. No warranty on journal roundness, runout, rod straightness, or weight matching. Suitable ONLY for engine rebuilders with precision measurement equipment. NOT suitable for direct bolt-in installation. Balance shaft NOT included. No returns accepted except for genuine not-as-described claims with photographic evidence. Buyer is responsible for VIN-based fitment verification before ordering.

📦 Shipping Information
- Heavy item — packaged with extra padding to protect journal surfaces during transit
- Processing Time: 3 Business Days
- USA: 7–15 Business Days (Standard Air) · 25–30 Business Days (Sea) · up to 40 Business Days if customs inspection
- Europe: 7–15 Business Days (Standard Air) · 35–40 Business Days (Economy Truck/Rail)
- Other Regions: Contact us for a quote