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Thread: X75 Hurricane heads, true or false

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    X75 Hurricane heads, true or false

    https://www.trademe.co.nz/motors/mot...648b18ca76aa17


    did triumph make a special head for the hurricanes or is it just an urban legend?

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    Quote Originally Posted by jellywrestler View Post
    https://www.trademe.co.nz/motors/mot...648b18ca76aa17


    did triumph make a special head for the hurricanes or is it just an urban legend?
    Parts books show the part number as 71-2585 for an X75 cylinder head and T150, T160 and Rocket 3 all different numbers again
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    Quote Originally Posted by Kickaha View Post
    Parts books show the part number as 71-2585 for an X75 cylinder head and T150, T160 and Rocket 3 all different numbers again
    i'd sort of expect the t150 and t160 heads to be different, surprised that the rocket three and t150 ones are though.

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    Interesting, I thought it was just a Craig Vetter styling exercise for Triumph. I like them.

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    Quote Originally Posted by jellywrestler View Post
    did triumph make a special head for the hurricanes or is it just an urban legend?
    I have looked through a few articles on/for any modifications ... Craig Vetter only modified the cylinder head by enlarging the fin area. This was done purely for aesthetic reasons. Otherwise ... standard specs for a BSA Rocket Three.
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    Quote Originally Posted by AllanB View Post
    Interesting, I thought it was just a Craig Vetter styling exercise for Triumph. I like them.
    And a good way to use/sell unsold BSA Rocket Three bike parts at a premium price ... from the closing down BSA factory.
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    Quote Originally Posted by FJRider View Post
    And a good way to use/sell unsold BSA Rocket Three bike parts at a premium price ... from the closing down BSA factory.
    they couldn't even sell the last two in new zealand, they were given away as prizes, one north island and one south island....

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    Quote Originally Posted by FJRider View Post
    I have looked through a few articles on/for any modifications ... Craig Vetter only modified the cylinder head by enlarging the fin area. This was done purely for aesthetic reasons. Otherwise ... standard specs for a BSA Rocket Three.
    any pics side by side to compare?

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    Quote Originally Posted by jellywrestler View Post
    any pics side by side to compare?
    I haven't but that would account for the different part numbers. It would/should also mean (maybe) a BSA Rocket Three head should fit on the X75 (with no modification) if necessary to make one go without buying the original Vetter part.
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    Quote Originally Posted by FJRider View Post
    I haven't but that would account for the different part numbers. It would/should also mean (maybe) a BSA Rocket Three head should fit on the X75 (with no modification) if necessary to make one go without buying the original Vetter part.
    but kickaha says they're not different part numbers. it's a huge job to make fins larger and needs a few skills outside the nrom to both weld and prep for this hence it really surprises me if vetter did just that.

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    Saw this one in the public car park at the Pukekohe Classic in 2010. It's the only one I've seen in NZ.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Quote Originally Posted by jellywrestler View Post
    any pics side by side to compare?
    Said to be Rocket 3 heads (The pic with two heads in it) and the one off trademe ...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Sweat wipes off. Road-rash doesn't.

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    Quote Originally Posted by Blackbird View Post
    Saw this one in the public car park at the Pukekohe Classic in 2010. It's the only one I've seen in NZ.
    I saw two at a Vincent rally in Alexandra once. Only once.
    Sweat wipes off. Road-rash doesn't.

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    Quote Originally Posted by jellywrestler View Post
    but kickaha says they're not different part numbers. it's a huge job to make fins larger and needs a few skills outside the nrom to both weld and prep for this hence it really surprises me if vetter did just that.
    His comment was
    Parts books show the part number as 71-2585 for an X75 cylinder head and T150, T160 and Rocket 3 all different numbers again
    Note ... All different numbers again.

    A relatively simple method would be re-casting the X75 heads. Changing the mold's is a (relatively) simple process. I once worked in a foundry. Making molds was part of my job description.

    As I said ... this would account for the different part number for the X75.
    Sweat wipes off. Road-rash doesn't.

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    This probably doesn't add much to the discussion even enlarged but this is Norm Hyde's supercharged Trident drag bike in its solo configuration. Norm was a development engineer on the Trident/Rocket 3 and he and his boss Doug Hele were really good buggers. Supplied a few bits at no cost for my drag bike back in the late 60's.
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