1. Announcement:
    The RULES- Read em and weep.
    Billy Golightly (Always finding new and exciting ways to not give a hoot in hell)
    03-02-2007
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    206,580
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Threads 1 to 50 of 736

Forum: Mad Scientists Lair

This forum is for all hardcore, extremely technical information relating to production and new age trikes. Hybrids, jig construction, high level engine performance, geometry, fabrication, and engineering. Be prepared to get a blast of information that no mortal man can stand. If you can't leave anything stock, or are hungry for highly technical information applicable to trikes this is the forum for you. Igor, fetch me that protractor and metal scribe. "Yes, master!"

  1. Sticky Thread Read This! Forum Purpose.

    Started by Billy Golightly, 03-16-2007 11:41 PM
    • Replies: 2
    • Views: 23,743
    J_Stafford
    05-30-2010, 06:00 PM Go to last post

  1. 200x stroker crank 1st gen

    Started by Shawn Powell, 06-03-2026 07:12 PM
    • Replies: 2
    • Views: 95
    Shawn Powell
    06-04-2026, 11:06 PM Go to last post

  2. KX250 Frame for an 86/87 Tecate Build?

    Started by wreckenthusiast, 01-28-2026 11:39 PM
    • Replies: 0
    • Views: 2,468
    wreckenthusiast
    01-28-2026, 11:39 PM Go to last post

  3. New Pipe for the 250R!

    Started by Red Rider, 05-02-2020 12:51 AM
    2 Pages •
    1 2
    28 Attachment(s)
    • Replies: 29
    • Views: 61,903
    vegas250rr
    12-07-2025, 10:30 PM Go to last post

  4. 200x engine build.

    Started by Shawn Powell, 10-31-2025 09:29 PM
    • Replies: 1
    • Views: 6,969
    Shawn Powell
    11-03-2025, 12:07 AM Go to last post

  5. First Gen Tecate with 87 KX250 Motor Project

    Started by wreckenthusiast, 10-04-2025 11:50 PM
    • Replies: 0
    • Views: 647
    wreckenthusiast
    10-04-2025, 11:50 PM Go to last post

  6. KTX Pro Plastics DONT DO IT!

    Started by Shawn Powell, 09-10-2025 03:06 PM
    • Replies: 0
    • Views: 3,039
    Shawn Powell
    09-10-2025, 03:06 PM Go to last post

  7. 85 250sx final drive machined to work on 1986 bike

    Started by rustyhondas, 04-13-2025 02:35 PM
    • Replies: 0
    • Views: 5,534
    rustyhondas
    04-13-2025, 02:35 PM Go to last post

  8. Exhaust pics atc250r 1st 2nd Gen pipes pics

    Started by Click, 06-28-2024 01:08 PM
    • Replies: 0
    • Views: 27,897
    Click
    06-28-2024, 01:08 PM Go to last post

  9. Cool Independent rear suspension road legal Honda 200m

    Started by SteveTheC, 01-20-2024 01:20 PM
    • Replies: 1
    • Views: 16,692
    ATC King
    01-28-2024, 12:08 AM Go to last post

  10. '84 200x carb slide options...

    Started by rsheehan79, 09-25-2023 06:15 AM
    • Replies: 1
    • Views: 16,561
    atc300r
    09-26-2023, 08:00 PM Go to last post

  11. Valve adjustment issues

    Started by agedatc, 03-31-2021 10:39 PM
    • Replies: 5
    • Views: 21,683
    ATC200X4716
    05-29-2023, 10:00 PM Go to last post

  12. Correct clutch pattern

    Started by Tortuga, 09-22-2022 04:34 PM
    • Replies: 4
    • Views: 18,858
    Tortuga
    09-23-2022, 03:37 PM Go to last post

  13. its that time again, ATC70 BUILD COMING.

    Started by KASEY, 11-24-2021 11:31 PM
    2 Pages •
    1 2
    30 Attachment(s)
    • Replies: 18
    • Views: 36,338
    BOB MARLIN
    04-05-2022, 12:13 PM Go to last post

  14. Turbo ATC200X... Go-Kart

    Started by ARJ0019, 02-09-2021 02:39 AM
    • Replies: 6
    • Views: 22,773
    ps2fixer
    02-12-2022, 04:10 PM Go to last post

  15. ATC Steering Stem Swaps?

    Started by Mr. NeverPlea, 10-30-2021 09:55 PM
    • Replies: 5
    • Views: 20,552
    Dirtcrasher
    02-12-2022, 03:53 PM Go to last post

  16. Hondaline ATC250es Cargo Net

    Started by sp00nfedem1, 01-11-2022 11:33 AM
    • Replies: 0
    • Views: 16,356
    sp00nfedem1
    01-11-2022, 11:33 AM Go to last post

  17. LiIon batteries for our ATC's

    Started by Gabriel, 12-01-2018 12:31 PM
    2 Pages •
    1 2
    3 Attachment(s)
    • Replies: 20
    • Views: 94,571
    ATC King
    11-09-2021, 10:41 PM Go to last post

  18. brake caliper swaps for 83-85 200x's

    Started by jason85atc250r, 03-17-2007 10:52 PM
    7 Pages •
    1 2 3 4 5 ... 7
    12 Attachment(s)
    • Replies: 94
    • Views: 1,069,963
    Leevvii
    06-20-2021, 03:23 AM Go to last post

  19. Check Out My Atc500r I Have Some Questions Sweet 500r Please Look

    Started by benm492, 05-07-2009 01:27 AM
    3 Pages •
    1 2 3
    2 Attachment(s)
    • Replies: 39
    • Views: 83,488
    benm492
    06-03-2021, 10:36 PM Go to last post

  20. Predator Swap

    Started by 200Maniac, 03-13-2021 09:15 AM
    • Replies: 2
    • Views: 19,945
    TrikeKid
    03-24-2021, 11:29 PM Go to last post

  21. Mini-R project

    Started by atc500x, 05-10-2020 11:31 PM
    2 Pages •
    1 2
    17 Attachment(s)
    • Replies: 29
    • Views: 515,148
    atc500x
    02-11-2021, 08:46 AM Go to last post

  22. Poll Poll: New Tri-z clutch covers

    Started by TRITecate350, 02-20-2008 08:03 PM
    3 Pages •
    1 2 3
    • Replies: 32
    • Views: 69,713
    YTZ drew
    01-16-2021, 11:27 PM Go to last post

  23. sand casting/aluminum-projects

    Started by Shep1970, 08-06-2017 09:36 PM
    6 Pages •
    1 2 3 4 5 ... 6
    112 Attachment(s)
    • Replies: 76
    • Views: 771,624
    Shep1970
    09-28-2020, 06:35 PM Go to last post

  24. Best frame for the job

    Started by JK47, 09-07-2020 11:15 AM
    • Replies: 0
    • Views: 16,470
    JK47
    09-07-2020, 11:15 AM Go to last post

  25. 87 200x Clutch Question

    Started by jasong_10, 07-25-2020 10:35 PM
    2 Pages •
    1 2
    • Replies: 15
    • Views: 46,785
    fieldy
    07-27-2020, 10:33 PM Go to last post

  26. 1983 250r airbox hose

    Started by ATC90JAY, 07-22-2020 09:06 PM
    • Replies: 0
    • Views: 17,193
    ATC90JAY
    07-22-2020, 09:06 PM Go to last post

  27. Locked up 85 atc 70 tranny.

    Started by Russman1986, 05-03-2020 03:39 PM
    • Replies: 2
    • Views: 20,453
    ATC King
    07-15-2020, 08:32 PM Go to last post

  28. What is it ? Help

    Started by jaybird4554, 06-15-2020 07:37 PM
    • Replies: 1
    • Views: 20,136
    oldskool83
    06-15-2020, 07:51 PM Go to last post

  29. Extreme Pipe Repair???

    Started by TheSuperJank, 05-01-2020 12:55 AM
    • Replies: 0
    • Views: 16,458
    TheSuperJank
    05-01-2020, 12:55 AM Go to last post

  30. Best cold starting but no starting when hot and eats plugs

    Started by RickieLee, 04-14-2020 04:14 PM
    • Replies: 2
    • Views: 18,032
    RickieLee
    04-14-2020, 07:39 PM Go to last post

  31. ATC 250R - Wider Footpegs

    Started by Red Rider, 11-03-2010 08:59 PM
    2 Pages •
    1 2
    10 Attachment(s)
    • Replies: 26
    • Views: 64,316
    Red Rider
    04-14-2020, 12:35 AM Go to last post

  32. need help for choose my carb for 84200m with wiseco 10.25 /1

    Started by superjeff97500, 03-25-2020 01:46 PM
    • Replies: 0
    • Views: 18,140
    superjeff97500
    03-25-2020, 01:46 PM Go to last post

  33. 200s Build

    Started by 3wheeler_kid, 03-23-2020 10:24 PM
    • Replies: 2
    • Views: 19,854
    3wheeler_kid
    03-24-2020, 04:42 PM Go to last post

  34. Fat Cat 250sx

    Started by atc500x, 11-29-2009 10:47 PM
    3 Pages •
    1 2 3
    23 Attachment(s)
    • Replies: 40
    • Views: 78,783
    atc500x
    02-02-2020, 09:10 AM Go to last post

  35. How to power valve your Tri-Z

    Started by Derrick Adams, 01-31-2005 09:24 PM
    4 Pages •
    1 2 3 4
    18 Attachment(s)
    • Replies: 50
    • Views: 105,678
    El Camexican
    12-30-2019, 07:15 PM Go to last post

  36. TRX250R Airbox Install on ATC250R

    Started by Red Rider, 02-13-2011 01:51 AM
    2 Pages •
    1 2
    22 Attachment(s)
    • Replies: 16
    • Views: 46,978
    Red Rider
    11-26-2019, 11:27 PM Go to last post

  37. Chain Alignment

    Started by Gabriel, 10-23-2019 10:55 AM
    • Replies: 4
    • Views: 20,707
    NeverLift
    10-23-2019, 03:04 PM Go to last post

  38. External Oil cooler atc185s case?

    Started by Laredo, 10-23-2019 08:59 AM
    • Replies: 2
    • Views: 19,375
    Laredo
    10-23-2019, 10:14 AM Go to last post

  39. New start to the 500 project

    Started by jeffatc250r, 01-11-2007 05:01 PM
    3 Pages •
    1 2 3
    9 Attachment(s)
    • Replies: 31
    • Views: 790,439
    atc300r
    10-22-2019, 01:08 PM Go to last post

  40. 1986 TRX/ATC Expansion Chamber Question

    Started by bauercolton2000, 08-22-2019 02:46 PM
    • Replies: 1
    • Views: 17,880
    Tri-Z 250
    08-23-2019, 10:34 AM Go to last post

  41. Tri-Z 600 conversion - Part 2

    Started by tri dee, 01-03-2008 01:32 PM
    2 Pages •
    1 2
    2 Attachment(s)
    • Replies: 15
    • Views: 50,644
    ATC-Eric
    08-03-2019, 08:38 PM Go to last post

  42. Mini Bike trike

    Started by Gabriel, 07-10-2019 05:07 PM
    • Replies: 0
    • Views: 18,183
    Gabriel
    07-10-2019, 05:07 PM Go to last post

  43. mudproof air intake gen 1 aircooled suggestions?

    Started by OldNo437, 07-02-2019 10:27 AM
    • Replies: 0
    • Views: 17,863
    OldNo437
    07-02-2019, 10:27 AM Go to last post

  44. Project Loose Fillings AKA The Goblin

    Started by Gabriel, 10-01-2018 01:27 PM
    7 Pages •
    1 2 3 4 5 ... 7
    17 Attachment(s)
    • Replies: 93
    • Views: 571,135
    yaegerb
    06-13-2019, 08:09 PM Go to last post

  45. EFI on an ATC??

    Started by Gabriel, 04-30-2019 02:07 PM
    2 Attachment(s)
    • Replies: 11
    • Views: 30,140
    RubberSalt
    05-01-2019, 01:30 PM Go to last post

  46. Single wheel pull conversion.

    Started by Gabriel, 01-22-2019 03:10 PM
    1 Attachment(s)
    • Replies: 10
    • Views: 26,675
    RubberSalt
    05-01-2019, 03:02 AM Go to last post

  47. Honda engine parts interchangeability

    Started by Gabriel, 03-25-2019 02:38 PM
    • Replies: 1
    • Views: 17,562
    RubberSalt
    04-30-2019, 11:34 AM Go to last post

  48. ATC 70 + Powerwheels = electric ATC 70

    Started by ADOR, 11-11-2010 05:39 PM
    2 Pages •
    1 2
    • Replies: 15
    • Views: 59,888
    Quinc
    04-04-2019, 11:54 AM Go to last post

  49. Suzuki dr350/ atc350x conversion

    Started by nick walke, 01-03-2010 12:45 PM
    3 Pages •
    1 2 3
    58 Attachment(s)
    • Replies: 38
    • Views: 87,097
    HorseMcHorseman
    04-02-2019, 12:02 AM Go to last post

  50. 200cc engine build......

    Started by Gabriel, 02-06-2019 04:13 PM
    • Replies: 5
    • Views: 22,780
    oldskool83
    03-25-2019, 12:41 PM Go to last post
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