Heads and Cylinders

All about your porting, compression, rings, cylinder and piston modifications to your bicycles engine

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  1. Sticky Threads
  2. BarelyAWake
    Sticky

    The Basics, Port & Polish and Port Matching

    BarelyAWake, Mar 20, 2010 ... 3 4 5
    Replies:
    98
    Views:
    85,191
    Porting newb
    Porting newb
    Jul 15, 2015
  3. Normal Threads
  4. Jellyfish420

    Slant head orientation

    Jellyfish420, Jul 5, 2017
    Replies:
    3
    Views:
    116
    xseler
    xseler
    Jul 6, 2017
  5. doomedgame

    Rings

    doomedgame, Jun 23, 2017
    Replies:
    3
    Views:
    118
    crassius
    crassius
    Jun 24, 2017
  6. doomedgame

    Modded pistons

    doomedgame, Jun 18, 2017
    Replies:
    2
    Views:
    180
    doomedgame
    doomedgame
    Jun 22, 2017
  7. Flathead

    Jets

    Flathead, Nov 27, 2016
    Replies:
    5
    Views:
    1,975
    Greg58
    Greg58
    Jun 4, 2017
  8. mobike91

    Hybrid cylinder engine options

    mobike91, May 20, 2017
    Replies:
    1
    Views:
    281
    Dan
    Dan
    May 24, 2017
  9. Cylon

    New high comp head!

    Cylon, Apr 14, 2017
    Replies:
    13
    Views:
    878
    Cylon
    Cylon
    May 16, 2017
  10. Cylon

    High comp head.

    Cylon, Apr 14, 2017
    Replies:
    1
    Views:
    248
    mobike91
    mobike91
    May 15, 2017
  11. shiveralex

    49cc High compression head

    shiveralex, Apr 16, 2017
    Replies:
    4
    Views:
    641
    Tyler6357
    Tyler6357
    Apr 24, 2017
  12. BikerMatt

    Bad Top End?

    BikerMatt, Jul 17, 2016
    Replies:
    11
    Views:
    1,279
    Slogger
    Slogger
    Apr 4, 2017
  13. dale_m

    Mixing cylinder bodies?

    dale_m, Mar 15, 2017
    Replies:
    2
    Views:
    646
    sbest
    sbest
    Mar 16, 2017
  14. Flathead

    Head gaskets

    Flathead, Jan 10, 2016
    Replies:
    17
    Views:
    2,202
    crassius
    crassius
    Feb 26, 2017
  15. daveet6666

    headbolts with no nuts works great!!

    daveet6666, Feb 12, 2017
    Replies:
    3
    Views:
    708
    crassius
    crassius
    Feb 19, 2017
  16. thumper68

    Compression

    thumper68, Jan 17, 2017
    Replies:
    2
    Views:
    1,583
    thumper68
    thumper68
    Jan 18, 2017
  17. Mouse

    Big jugs

    Mouse, Jan 28, 2016
    Replies:
    12
    Views:
    3,798
    Mouse
    Mouse
    Dec 23, 2016
  18. crassius

    something to think about

    crassius, Nov 17, 2016
    Replies:
    2
    Views:
    1,127
    crassius
    crassius
    Nov 24, 2016
  19. SpeedingTurtle

    How to clean

    SpeedingTurtle, Oct 26, 2016
    Replies:
    1
    Views:
    1,002
    crassius
    crassius
    Oct 26, 2016
  20. Knuckledragger

    ZAE 50 connecting Rod

    Knuckledragger, Oct 24, 2014
    Replies:
    13
    Views:
    4,302
    granto102
    granto102
    Oct 20, 2016
  21. vhatley

    Port Matching Questions And A Good Word About A Supplier

    vhatley, Oct 15, 2016
    Replies:
    0
    Views:
    980
    vhatley
    vhatley
    Oct 15, 2016
  22. Flathead

    Headbolts

    Flathead, Dec 29, 2015
    Replies:
    13
    Views:
    3,047
    mogollonmonster
    mogollonmonster
    Sep 11, 2016
  23. Flathead

    Piston

    Flathead, Jan 4, 2016
    Replies:
    7
    Views:
    1,838
    sbest
    sbest
    Aug 28, 2016
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