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Thread: Sprock cool heads

  1. #1
    Join Date
    Mar 2017
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    Pa
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    Sprock cool heads

    So I came across a sprock head with no dome . Is there any other dome I could use or find a sprock dome thanks in advance

  2. #2
    HondaRidr's Avatar
    HondaRidr is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Sep 2010
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    Salt Lake
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    The seller said you could use 250R domes in it...

  3. #3
    Join Date
    Mar 2017
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    Pa
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    Ok cool that’s what I thought . Now next question would be are the 250 r domes still available I called sp performance but can’t get them to answer phone

  4. #4
    Join Date
    Apr 2011
    Location
    Mexico
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    9,003
    Try ATC-Eric on here, or Off-Road Innovations. I think Greg is the guy to talk to.
    It sucks to get old

  5. #5
    Join Date
    Mar 2017
    Location
    Pa
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    I have been talking to Greg an he has all the hardware an o rings but no domes or heads . He’s pretty certain that 250r domes won’t work .so I’m not sure what to do maybe just spend the 40 for 21 cc 250r dome an see how it fits . Unless I can find one of the ones that came with it . Thanks

  6. #6
    Join Date
    Apr 2011
    Location
    Mexico
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    Not sure how deep you want to reach into your pockets for this, but one option might be to buy the smaller cc dome and send it to Rob Selvy to have reworked to whatever volume and squish you want.

    Contact him first though, I wanted him to do that to a Yamaha Cool Head and he said the material wasn't there to do the dome shape he developed, so I had to send a stock head. Maybe the Honda is different, or he's willing to compromise. That brings up another and probably better/cheaper option and that is to send him your stock head for the full meal deal. He can O-ring it too. Give him you current squish, head gasket thickness and deck height and tell him what fuel you want to run and he will set you up with exactly what you need, probably for about the same as an off the rack Sprock Head that won't be as tailored to your engine as his would be.

    As an example, the engine I did put a Sprock head on needed a fair bit of material turned off the cylinder in order to get the squish in spec. That's not a knock at Sprock's product, they're built for a better safe than sorry scenario as are all in-stock performance parts, I'm just saying that Selvy will do that work for you.

    My $0.02
    Last edited by El Camexican; 02-25-2021 at 03:58 PM.
    It sucks to get old

  7. #7
    Join Date
    Mar 2017
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    How would I get in contact with rob selvy

  8. #8
    Join Date
    Apr 2011
    Location
    Mexico
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    9,003
    Quote Originally Posted by Justis View Post
    How would I get in contact with rob selvy
    I met him through Yaeger Performance, or Yaegerb on here.
    It sucks to get old

  9. #9
    Join Date
    Nov 2003
    Location
    Columbia
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    5,131
    Hey guy, I can help you. Shoot me a message.
    My feedback: http://www.3wheelerworld.com/showthr...k-for-ATC-Eric

    Survivor! TF: 07, 08, 09, 10, 11, 12, 13 Sandpuppies: 07, 08, 09, 10, 11, 16, 17, 18 Imperial Invasion 09, 10, 11, 13, 15, 16, 17, 18, 19, 20

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