ATHENA Engine Oil Seal Kit for APRILIA MX 125, RX 125 1995-2006

On APRILIA MX 125, RX 125 from 1995 to 2006, the ATHENA P400010400013 engine oil seal kit fits in place of the original part. Every shaft that passes through the crankcase runs in an oil seal. Over time the lip hardens and oil escapes; on a two-stroke, a leak on the crankshaft side upsets the carburation.

Specifications

• Brand: ATHENA
• Manufacturer part number: P400010400013
• EAN code: 8052204231485
• Weight: 70 g
• Engine: 2-stroke

When to replace it?

• Oil around the countershaft sprocket, the gear shift shaft or the kick-start.
• On a two-stroke: unstable idle, hanging revs or a drop in the gearbox oil level.
• Lip hardened or split, or shaft marked where the seal runs.

Every time the crankcases are split, and as soon as a leak appears.

Fitting tips

1. Drive out the old seal without scratching its housing.
2. Lightly grease the lip and the housing.
3. Press the seal in perfectly square with a tube or socket of the same diameter, lip facing the oil side.
4. Protect the lip from the splines or keyways as you slide the shaft through (adhesive tape).

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

• Crankshaft bearings and seals : see the selection
• Complete engine gasket kit : see the selection
• Gearbox oil : LIQUI MOLY 10W30 1 L · LIQUI MOLY 500 ml

Frequently asked questions

Which seals are included?
The engine's oil seals, depending on the model: crankshaft, countershaft, gear shift shaft, kick-start or water pump. If in doubt, compare with your original parts.

Cases split: what else should I replace?
The crankshaft bearings and a complete engine gasket kit.

Compatibility

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

Fits:
APRILIA MX 125 2006
APRILIA MX 125 2005
APRILIA MX 125 2004
APRILIA RX 125 2001
APRILIA RX 125 2000
APRILIA RX 125 1999
APRILIA RX 125 1998
APRILIA RX 125 1997
APRILIA RX 125 1996
APRILIA RX 125 1995