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Thread: Difference between NOS pulley unit and modern pulley unit?

  1. #1
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    Question Difference between NOS pulley unit and modern pulley unit?

    Does anyone have any idea why these parts look different?

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    They are both supposed to be pulley units for the same model (Piaggio Beverly 200, no year mentioned). One is an NOS part and the other one, presumably a modern replacement.

    Now, granted, the new part on the left may not reflect the actual part, but that's how it's listed on the scooter-center website (part #CM144133).

    The new part (top) seems to be made out some cast metal; while the NOS part (bottom) seems to be made out of one piece forged/formed steel metal (the pulley part anyway).

    Now, assuming that both versions are for the same bike, which one would be better or which one would you choose? It would appear that the one made out of formed steel would be a better part because it would be a lot more durable, but that's just my guess.

    Thanks to anyone that can shed any light!

    Cheers!

  2. #2
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    Back in the day Piaggio subbed out their clutch and variator production to TGB and possibly Yamaha. The one on the right is the TGB version which I understand was from the 2003 to 2005 BV200 while the other is the new style 2005 to 2006 version.

    The machining of the clutch shaft may be slightly different so I would stay with the one that matches the year of your bike.

  3. #3
    apriliaforum prov-nov Pinkscoot's Avatar
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    The TGB looks like it may only have 2 pads.

  4. #4
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    Quote Originally Posted by Pinkscoot View Post
    The TGB looks like it may only have 2 pads.
    It has 3, here's a another perspective.

    Click image for larger version. 

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  5. #5
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    Quote Originally Posted by Rockynv View Post
    The machining of the clutch shaft may be slightly different so I would stay with the one that matches the year of your bike.
    Thanks! But... assuming that they're interchangeable, which one would you choose?

    Here's another perspective of the new production part:

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    Last edited by eframsergio; 12-14-2017 at 10:39 AM. Reason: Added pic

  6. #6
    apriliaforum expert Southpaw56's Avatar
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    The steel pulley on the TGB may be more durable. Looks similar to the clutch in my '08 Scarabeo.

    Sp56

  7. #7
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    Quote Originally Posted by Southpaw56 View Post
    The steel pulley on the TGB may be more durable. Looks similar to the clutch in my '08 Scarabeo.

    Sp56
    The steel pulley on mine has no grooving while the aluminum variator sheaves will need replacing well before the steel driven sheaves. Grooving causes vibration and all sorts of stress on the frame, fairings, belt and gearbox so I would be inclined to go with the steel one for longer service life. The OEM Clutch should last 50,000 or so miles if the idler bearings are cleaned and greased at every belt service and the CVT air filter is kept clean. Many replace clutches way too early due to lack of simple maintenance.

  8. #8
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    Great! Thanks for the opinions, it makes sense that the NOS would be better even though the new production one looks a lot more impressive, being all nice and shiny, ha ha!

  9. #9
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    Just make sure fresh grease is used on the needle bearings that roll on the input shaft to the gear box. If the OEM grease has dried up you need to do a very good job cleaning it out before applying fresh.

  10. #10
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    Quote Originally Posted by Rockynv View Post
    Just make sure fresh grease is used on the needle bearings that roll on the input shaft to the gear box. If the OEM grease has dried up you need to do a very good job cleaning it out before applying fresh.
    Thanks for the tip!

    Cheers!

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