ATHENA Engine Bearing for APRILIA RX 50 1991-1998

On APRILIA RX 50 from 1991 to 1998, the ATHENA MS170470140N3 engine bearing fits in place of the original part. In a motocross engine, the bearings spin fast and take hard knocks. Replacing a tired bearing at the right time saves the crankcase or the gearbox from damage.

Specifications

• Brand: ATHENA
• Manufacturer part number: MS170470140N3
• EAN code: 7316570338256
• Type: 6303TN9/C3
• Weight: 110 g
• Engine: 2-stroke

When to replace it?

• Bearing noise or engine rumble.
• Play or tight spot when turning the bearing by hand.
• Signs of overheating or rust on the races.

During an engine rebuild, or as soon as a bearing shows play or tight spots.

Fitting tips

1. Heat the crankcase (around 100 to 120 °C) to remove the old bearing and fit the new one without force.
2. Only push on the race that is the tight fit: outer race in the crankcase, inner race on the shaft.
3. Check which way round it goes if the bearing has a shielded side.
4. Close up with new gaskets or a complete engine gasket kit.

Why ATHENA?

Founded in 1973 near Vicenza, Athena is an Italian engine gasket specialist that has made its gaskets on its own production lines since day one, as well as a renowned manufacturer of pistons and cylinder kits. The brand supplies original equipment to manufacturers such as KTM, Ducati, Fantic, Piaggio and Triumph, and is a partner of the MXGP motocross world championship.

Spare parts and items to plan

• Complete engine gasket kit : ATHENA
• Gearbox oil : LIQUI MOLY 10W30 1 L · MOTUL 80W90 1 L

Frequently asked questions

Is the bearing OEM quality?
It is supplied by Athena; the bearing brand (SKF, KOYO, NTN…) is given in the specifications when it is known.

Compatibility

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

Fits:
APRILIA RX 50 1998
APRILIA RX 50 1997
APRILIA RX 50 1996
APRILIA RX 50 1995
APRILIA RX 50 1994
APRILIA RX 50 1993
APRILIA RX 50 1992
APRILIA RX 50 1991