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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:
    28,998
    Clotho
    Clotho
    Jun 28, 2009
  3. Normal Threads
  4. Warphones

    Reaching 50mph on 66/80cc

    Warphones, Mar 23, 2020 ... 2
    Replies:
    30
    Views:
    1,395
    Tyler6357
    Tyler6357
    May 1, 2020
  5. bajaracer1

    My first race bike build 212cc predator!

    bajaracer1, Jul 24, 2012 ... 7 8 9
    Replies:
    168
    Views:
    73,750
    indian22
    indian22
    Apr 24, 2020
  6. Mercman

    Center Stand?

    Mercman, Feb 23, 2012 ... 2
    Replies:
    21
    Views:
    4,121
    indian22
    indian22
    Mar 16, 2020
  8. Morbius18

    Port matching case to cylinder

    Morbius18, Feb 18, 2020
    Replies:
    1
    Views:
    238
    Morbius18
    Morbius18
    Feb 18, 2020
  9. breath_easy13

    Removing Governor on 212cc, Oil sensor question -

    breath_easy13, Jan 4, 2020
    Replies:
    5
    Views:
    350
    breath_easy13
    breath_easy13
    Jan 5, 2020
  10. mrfubs

    Stihl ms660 54mm project

    mrfubs, Jun 7, 2018 ... 2
    Replies:
    24
    Views:
    10,095
    mrfubs
    mrfubs
    Oct 7, 2019
  11. Joshua_ schwinn_lowrider

    Engine Not Starting After Port Work.

    Joshua_ schwinn_lowrider, May 27, 2016
    Replies:
    16
    Views:
    4,633
    kelly dean
    kelly dean
    Oct 4, 2019
  12. shiveralex

    Bicylce-Engines expansion chamber

    shiveralex, Apr 11, 2017 ... 2
    Replies:
    23
    Views:
    7,810
    kelly dean
    kelly dean
    Oct 4, 2019
  13. Mercman

    Best overall 66 cc carb?

    Mercman, Mar 27, 2012 ... 2
    Replies:
    36
    Views:
    20,288
    BjevonT
    BjevonT
    Oct 2, 2019
  14. Pedrito0906

    Piston crown mod!

    Pedrito0906, Jun 29, 2013 ... 2
    Replies:
    20
    Views:
    9,709
    FOG
    FOG
    Sep 21, 2019
  15. Jeff J10

    PLEASE HELP!!

    Jeff J10, Aug 10, 2019
    Replies:
    15
    Views:
    777
    javy mcdees
    javy mcdees
    Aug 31, 2019
  17. FoCoMoTo

    Low end power mods!

    FoCoMoTo, Apr 26, 2013 ... 2
    Replies:
    20
    Views:
    16,743
    Bossboots
    Bossboots
    Aug 4, 2019
  18. Alex Reiner

    Is my top speed of 25 MPH all it's got?

    Alex Reiner, Jul 29, 2019
    Replies:
    1
    Views:
    494
    indian22
    indian22
    Jul 30, 2019
  19. stv1jzgte

    How fast can your 49cc Really go?

    stv1jzgte, Feb 22, 2009 ... 2 3 4
    Replies:
    60
    Views:
    65,620
    Sldgehmmr
    Sldgehmmr
    Jul 29, 2019
  20. graydog8josh

    dellorto phbg 19mm carb from treatland tuning woes

    graydog8josh, Feb 27, 2014 ... 2
    Replies:
    26
    Views:
    8,832
    javy mcdees
    javy mcdees
    May 11, 2019
  21. Nate&Brandi

    What's the smallest rear sprocket you can/used? *story time with pics*

    Nate&Brandi, Feb 16, 2019
    Replies:
    2
    Views:
    840
    zing
    zing
    Mar 15, 2019
  22. ChiefMongrel

    What size carb should I use?

    ChiefMongrel, Jan 22, 2018
    Replies:
    7
    Views:
    1,180
    Jimmy Bloodmaker
    Jimmy Bloodmaker
    Feb 23, 2019
  23. Mike_Honcho

    Removing welch plug HuaSheng 49cc 4 stroke

    Mike_Honcho, Jan 10, 2019
    Replies:
    11
    Views:
    932
    Tom from Rubicon
    Tom from Rubicon
    Jan 13, 2019
  24. DuctTapedGoat

    Porting - are you actually taking advantage of it?

    DuctTapedGoat, May 7, 2011 ... 2
    Replies:
    38
    Views:
    23,025
    Tool Dog
    Tool Dog
    Dec 17, 2018
  26. stock762

    Performance build WIP ...Video

    stock762, Oct 14, 2017
    Replies:
    18
    Views:
    2,085
    Márk Vörös
    Márk Vörös
    Dec 6, 2018
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