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  1. #1
    billy's gpr's Avatar
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    66v cylinders on a 66e

    i know port timing is different on these ,but what would be to pros if any and the cons of doing this as i have a lot of 66v parts ,and the misses 800 just eat a pto cylinder , @ 34 hours after a genuine yamaha rebuilt (before i bought it) ,thay know how to tune them!!!


  2. #2
    yz450f's Avatar
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    this would be interesting.
    wonder if it will work??

  3. #3
    Me Hahn and Joe H204YOU's Avatar
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    The 66-E cyls produce a small amount more HP due to the transfer ports closest to the exhaust,they angle closer to the exhaust at the bottom,and dont allow much room for larger overbores.If your thinking big bore the 66-V cyls would be ideal for big bore group K pistons with the option of running power valves.Hope this helps.

  4. #4

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    I doing just that 66e cases and 66V cylinders. 2 set ups.

    One has already been ported by TJ and the other will be just cleaned up.

    Riva 1300R cast heads decked, use stock metal 1300r gasket cut one off. Jet up on the high. i will go from 150 to 160 and tune from there.

    One will go in a 800R and the other into a WB2. With some luck i will have time to put the motors together in the next few weeks.

    Pat

  5. #5
    yz450f's Avatar
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    hey pat let me know how that work out on the 800 not the blaster.
    and let me know the porting prices i mite be interested in that

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