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Oil Seal crankshaft flywheel

for Vespa 125 VNA2 2°/VNB/GT
/GTR 1°/Super/TS 1°/150 VBA
2°/VBB/VGLA/B/GL/Super 1°
/Sprint/V 1°,
square cut out, 20x40x6 mm,

Radial shaft oil seals should be installed firmly into the crankcase for a tight and secure fit. The inner circumference of the ring is the contact point to the rotating shaft and is mostly held in place with a circular spring to keep it sealed tight around the shaft. These items wear out regularly and should be replaced during every service of your motor. If the motor has not been run for a while the seals could be damaged. If the revs of your motor increase while it should be ticking over, the oil seal on the flywheel side of the crankshaft is probably defective or damaged. If you discover fuel mixed with your gearbox oil, the oil seal that sits on the clutch side of the crankshaft is the likely suspect.

We have oil seals produced by several manufacturers available, constructed using a variety of materials. The blue and black versions are made of a synthetic rubber, the blue type mostly produced by CORTECO are a little tougher than the black type which can be found in most engines as an original PIAGGIO component. The brown seals are produced using a fluoro polymer material (FPM) are especially heat resistant (up to 160°) are harder wearing with more resistance against oil. Both types see wide spread use in all two -stroke motors.

Here at SIP there is no consensus amongst us as to which type is best, so we have solved this problem as PIAGGIO has done and stock all colours and types to keep everybody happy.

Helpful hint: As a rule of thumb, to ensure correct positioning of your fresh oil seals, the 'open' side of the seal always faces towards the one of the chambers that it separates, with the higher pressure. This higher pressure also helps the inner circumference maintain the seal to the shaft by pushing the inner edge against it.


SIP-TIP: Loctite oil seal adhesive keeps oil seals in place effectively, even in worn crankcases.

The round or square opening in the oil seal enables rinsing the bearing with gas-oil mix. The opening shape is irrelevant for it's function: an oil seal with a round opening can be installed in a motor that formerly used an oil seal with a square opening.

OEM Numbers (for the purpose of comparison)  084644 (PIAGGIO)

Customers also searched for this article with:  oilseal

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40069000 $8.48
46599000 $3.81
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RMS Classic
Cylinder, Piston & Crankshaft

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Product forums
icon scootermodels This product fits the following models
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 125 (T1/125) (D) 125 VNA1-2 2T AC `57-`59 flywheel side, VNA2M 091393 ->
VESPA 125 (T2/125) (D) 125 VNB1-6 2T AC `59-`65 flywheel side
VESPA 125 GT / 125 Sprint 125 VNL1-2 2T AC `61-`73 flywheel side
VESPA 125 GTR 125 VNL2T 2T AC `68-`78 flywheel side, -> 145900
VESPA 125 Super 125 VNC1T 2T AC `65-`69 flywheel side
VESPA 125 TS 125 VNL3T 2T AC `75-`78 flywheel side, -> 18138
VESPA 150 150 VBB1-2 2T AC `60-`67 flywheel side
VESPA 150 150 VBA1T 2T AC `58-`60 flywheel side, VBA1M 313584 ->
VESPA 150 (T4/150) (D) 150 VGLA-B 2T AC `59-`65 flywheel side
VESPA 150 GL 150 VLA1T 2T AC `62-`64 flywheel side
VESPA 150 Sprint 150 VLB1T 2T AC `65-`74 flywheel side
VESPA 150 Sprint Veloce 150 VLB1T 2T AC `69-`79 flywheel side, -> 294259
VESPA 150 Super 150 VBC1T 2T AC `65-`79 flywheel side, -> 412373

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