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High Performance Bicycle Engine Tips and Motorized

We all want our bicycle engines to push our bikes faster. Get exclusive engine modification tips and suggestions from us. Also check out some of our racing members builds

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  1. Sticky Threads
  2. Dave31
    Locked Sticky

    Warning to all about performance mods to your motorized bicycle

    Dave31, Jun 28, 2009
    Replies:
    1
    Views:
    26,088
    Clotho
    Clotho
    Jun 28, 2009
  3. Normal Threads
  4. onanysunday

    NGK BP6HS = Higher Compression?

    onanysunday, Apr 23, 2011 ... 2
    Replies:
    20
    Views:
    9,027
    Citi-sporter
    Citi-sporter
    Sep 15, 2018
  5. TheNecromancer13

    212cc Predator Experiment - Performance Build

    TheNecromancer13, Aug 23, 2018
    Replies:
    8
    Views:
    421
    Tony01
    Tony01
    Sep 11, 2018
  6. talbotti

    wet clutch experiment

    talbotti, Jan 27, 2012
    Replies:
    13
    Views:
    3,281
    cannonball2
    cannonball2
    Sep 7, 2018
  8. DuctTapedGoat

    Porting - are you actually taking advantage of it?

    DuctTapedGoat, May 7, 2011 ... 2
    Replies:
    36
    Views:
    17,339
    Racin8de
    Racin8de
    Aug 13, 2018
  9. stock762

    Performance build WIP ...Video

    stock762, Oct 14, 2017
    Replies:
    15
    Views:
    816
    stock762
    stock762
    Aug 12, 2018
  10. mrfubs

    Stihl ms660 54mm project

    mrfubs, Jun 7, 2018
    Replies:
    16
    Views:
    1,389
    javy mcdees
    javy mcdees
    Aug 12, 2018
  11. exokinetic

    Apollo Moto Racing - Current Race Engine Build List

    exokinetic, Apr 24, 2016
    Replies:
    3
    Views:
    2,569
    kaneto
    kaneto
    Aug 5, 2018
  12. datz510

    High Performance Dellorto carb found!

    datz510, Jul 23, 2008 ... 2 3 4
    Replies:
    78
    Views:
    70,455
    Hashbrown
    Hashbrown
    Jul 20, 2018
  13. Nnn

    Is Head shaving a mod?

    Nnn, Jul 14, 2018
    Replies:
    5
    Views:
    227
    Venice Motor Bikes
    Venice Motor Bikes
    Jul 16, 2018
  14. Hashbrown

    Bogging uphill.

    Hashbrown, Jul 9, 2018
    Replies:
    6
    Views:
    245
    Hashbrown
    Hashbrown
    Jul 15, 2018
  15. wtwrestling07

    Changing Bearings

    wtwrestling07, Mar 7, 2015
    Replies:
    3
    Views:
    2,000
    Inf3ct3d89
    Inf3ct3d89
    Jun 10, 2018
  17. MattK

    Carburettor Plug and Jet change (on 49cc china motor) Observations

    MattK, May 7, 2018
    Replies:
    13
    Views:
    535
    Tyler6357
    Tyler6357
    May 28, 2018
  18. stv1jzgte

    How fast can your 49cc Really go?

    stv1jzgte, Feb 22, 2009 ... 2 3
    Replies:
    58
    Views:
    51,109
    carl clack
    carl clack
    May 17, 2018
  19. mountain80

    dellorto phbg questions

    mountain80, Nov 8, 2009
    Replies:
    3
    Views:
    1,712
    SIMON.j.k
    SIMON.j.k
    Apr 27, 2018
  20. graydog8josh

    dellorto phbg 19mm carb from treatland tuning woes

    graydog8josh, Feb 27, 2014 ... 2
    Replies:
    20
    Views:
    5,501
    SIMON.j.k
    SIMON.j.k
    Apr 27, 2018
  21. Pedrito0906

    Piston crown mod!

    Pedrito0906, Jun 29, 2013
    Replies:
    15
    Views:
    6,782
    TheSignGuy
    TheSignGuy
    Apr 26, 2018
  22. mike carter 2

    kings motors gt 80

    mike carter 2, May 17, 2016 ... 4 5 6
    Replies:
    106
    Views:
    16,435
    mike carter 2
    mike carter 2
    Feb 22, 2018
  23. Smith80

    Offroad Build

    Smith80, Jan 29, 2018
    Replies:
    0
    Views:
    294
    Smith80
    Smith80
    Jan 29, 2018
  24. ChiefMongrel

    What size carb should I use?

    ChiefMongrel, Jan 22, 2018
    Replies:
    1
    Views:
    291
    Venice Motor Bikes
    Venice Motor Bikes
    Jan 26, 2018
  26. mrfubs

    what CDI? Jaguar or HD Lightning?

    mrfubs, May 16, 2014 ... 2
    Replies:
    27
    Views:
    10,191
    Dobby
    Dobby
    Jan 17, 2018
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