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RS250 Powervalves

Discussion in 'Aprilia 250cc' started by kiffsta, Jan 3, 2013.

  1. 996bip

    996bip Member

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    Four of these bad boys just arrived from Italy. Fantastic quality. Two piece design eliminating the pin slot issues and also does away with the spring which wears the collars
     
  2. Scotchy

    Scotchy Active Member

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    They look the same as Vj21 pvs.
     
  3. 996bip

    996bip Member

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    Yes the same. Vj21 Fit vj22 Fit rs250
     
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  4. risky

    risky risky

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    handy to know
     
  5. kiffsta

    kiffsta Senior Member

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    Who is the manufacturer, how much were they?
     
  6. 996bip

    996bip Member

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    They are made by some Italian guy on the Aprillia rs250 forum called Luca. €210 well worth it.

    Right then I just machined some new collars from brass. I have added a shoulder to increase contact area and reduce wear. I have also added 0.5mm as an insurance policy to the front face. Sure the valve will be a tiny bit open but less chance of contact with the rings. Here is a pic and my drawing.

    Pic

    DSC_0005.jpg

    My design done down the pub.

    DSC_0007.jpg
     
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    Last edited by a moderator: Apr 4, 2014
  7. Mclaren

    Mclaren Well-Known Member Contributing Member

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    Hope that all within a +\- .01 tolerance hahahaha
     
  8. 996bip

    996bip Member

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    I ran out of decimal points on the digi calipers. I must try harder.
     
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  9. 996bip

    996bip Member

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    DSC_0016.jpg DSC_0017.jpg There in! DSC_0016.jpg
     
  10. Russky

    Russky Careful, man, there's a beverage here! Premium Member Contributing Member

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    Please elaborate on the powervalve causing the rattle. Ive just picked up a rs125 that has a distinct rattle/tapping at lower rpm. Happens both at idle and coasting. Goes away under acceleration.

    Is this the powervalve or big end bearing?

    Cheers
     
  11. Scotchy

    Scotchy Active Member

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    Rs 125 power valves are different to Rgv ones. But I have installed one. Id say its your big end cause there isn't much to rattle. Search rave valve and you will see what I mean
     

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