ATHENA Racing Complete Crankshaft for APRILIA RX 50 2006-2014

The ATHENA Racing 081015 complete crankshaft is designed for APRILIA RX 50 from 2006 to 2014. The crankshaft turns the up-and-down motion of the piston into rotation. In a two-stroke, it also spins inside the crankcase, which acts as a pump: the quality of its balancing, the accuracy of its alignment and the condition of its big end determine vibration, reliability and the way the engine revs.

Specifications

• Brand: ATHENA
• Manufacturer part number: 081015
• EAN code: 8057018260379
• Weight: 1.78 kg
• Engine: 2-stroke

When to replace it?

• Play at the big end (vertical movement of the connecting rod at top dead centre).
• Unusual vibration, dull noise from the bottom end.
• Signs of overheating or seizure on the small-end bearing or the crank pin.

During a bottom end rebuild, or as soon as play appears at the big end. A complete crankshaft saves you having the original crank assembly pressed apart and realigned.

Fitting tips

1. Replace the crankshaft bearings and oil seals at the same time.
2. Before closing the crankcases, check the side play and the run-out. Run-out is the deviation you measure with a dial indicator at the end of the shaft while turning the crankshaft: it shows whether the two flywheels are perfectly aligned. The lower it is, the less the engine vibrates.
3. Close up the engine with a new complete engine gasket kit.
4. Check the gearbox bearings while the cases are split.
5. Tighten the flywheel nut and primary gear nut to the torque given by the manufacturer, then fill up with fresh oil.

Why ATHENA?

Athena, an Italian company founded in 1973 near Vicenza, designs gaskets, pistons and cylinder kits for motorcycles. An OEM supplier to KTM, Ducati, Fantic, Piaggio and Triumph and a partner of the MXGP world championship, it develops its parts on the test bench and on the track with racing teams.

Spare parts and items to plan

• Crankshaft bearings and seals : see the selection
• Complete engine gasket kit : ATHENA
• 2-stroke oil : LIQUI MOLY 1 L · MOTUL 800 1 L
• Spark plug : NGK 3961 · NGK 5722

Frequently asked questions

Are the bearings supplied?
No: you'll need the crankshaft bearing and seal kit, the complete engine gasket kit, the gearbox bearings if required, engine oil and a new spark plug.

What does “run-out” mean?
It's the deviation in the crankshaft's rotation, measured with a dial indicator at the end of the shaft. Very low run-out means the flywheels are perfectly aligned: the engine vibrates less and its bearings last longer. It has nothing to do with full-circle flywheels or balancing, which concern the shape and weight distribution of the flywheels.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
APRILIA RX 50 2014
APRILIA RX 50 2013
APRILIA RX 50 2012
APRILIA RX 50 2011
APRILIA RX 50 2010
APRILIA RX 50 2009
APRILIA RX 50 2008
APRILIA RX 50 2007
APRILIA RX 50 2006