Can I use my exisitng cylinder head with this kit?

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    Axiom

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    Can I use my exisitng cylinder head with this kit?

    Post by Axiom on Sun Jan 06, 2013 10:19 am

    I know it says I can, but can I really?

    http://www.ebay.co.uk/itm/Vespa-T5-125-POLINI-152-Racing-Cylinder-Kit-/290810965685?pt=UK_Motorcycle_Parts&hash=item43b5af2eb5
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    ttscshaggy

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    Re: Can I use my exisitng cylinder head with this kit?

    Post by ttscshaggy on Sun Jan 06, 2013 11:55 am

    your existing head needs to be machined out and re-profiled to fit
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    Wally
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    Re: Can I use my exisitng cylinder head with this kit?

    Post by Wally on Sun Jan 06, 2013 11:56 am

    Not really - in simple terms the bore is bigger, therefore you will need the head reprofiling to suit


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    Axiom

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    Re: Can I use my exisitng cylinder head with this kit?

    Post by Axiom on Mon Jan 07, 2013 6:40 am

    Just out of interest though, why do they say I can use my existing head with no modifications?
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    NorthernJordan
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    Re: Can I use my exisitng cylinder head with this kit?

    Post by NorthernJordan on Mon Jan 07, 2013 11:30 pm

    You could, but the compression would be very high. It may have worked well back in "the day" when fuel was leaded and very good. But now fuel is full of ethonal and additives and runs alot hotter, so you will be holing piston pretty quick using the normal head.


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    ttscshaggy

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    Re: Can I use my exisitng cylinder head with this kit?

    Post by ttscshaggy on Tue Jan 08, 2013 5:32 am

    Thats true.
    but I'd be more concerned about the edge of the piston crown hitting the edge of the head

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