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Thread: 350x Motocross Build - Pushing the Limits

  1. #1
    xrider is offline Got The Holeshot Arm chair racerJust too addicted
    Join Date
    Oct 2006
    Location
    Wapakoneta
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    808

    350x Motocross Build - Pushing the Limits

    I finally am far enough on this project to get a build thread started, so here it goes. I decided over the winter that I wanted to build my 350x into a motocross trike. This will be my last full trike build for a long time so I am going all out on this one and modernizing the chassis as much as possible to utilize off the shelf parts. The frame is in its final stages with Mike at HRE being fully gusseted and having TRX450 rear suspension linkage mounts added. HRE is also making a custom +2 swingarm which has the 350x pivot end mated to a TRX450 rear end. For the front end, I decided to go with Jason Hall’s Inverted Fork kit, running CR125 forks. The motor is a 425 Big Bore (Four Stroke Tech) matched with Webcam’s mid level cam (.370 lift, 250 deg duration at .040", and lobe centers at 109 deg). The exhaust came from NOS_350x and is made out of stainless steel and was custom made to my motor specifications. The rear end (axle, carrier, brake lock nut) are all Lonestar racing. I have parts coming in almost every day for this build, so I will be sure to post plenty of pictures along the way. As with most of my builds, this will be dyno tuned and I will post the charts at the completion of the project. Thanks for looking, xrider









  2. #2
    Join Date
    May 2011
    Location
    eden,ny
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    3,477
    looks like you have some very nice parts to work with.I can't wait to see it done

  3. #3
    HondaRidr's Avatar
    HondaRidr is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Sep 2010
    Location
    Salt Lake
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    295
    Wow. Should be killer when its finished!

  4. #4
    Join Date
    Nov 2010
    Location
    Oshawa, On, Canada
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    2,123
    Will be following this thread VERY closely. Looks like its going to be a killer build!
    1985 Honda 250r x2
    1986 Honda 250r
    1986 Honda 250sx
    1985 Honda 250sx x2
    1985 Honda 350x x2
    1986 Honda 350x
    1984 Honda 125m x4
    1983 Honda atc 70 w/ Lifan 125
    1984 Honda atc 70
    Yamaha tri zinger
    Yamaha 4 zinger
    Brap braaaap

    http://www.youtube.com/user/3wheelsoffroad

  5. #5
    Join Date
    Jan 2010
    Location
    Nicholson, Pennsylvania, United States
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    1,641
    How do you get the Jason Hall stuff?Looks like you are definitely going all out!With all top shelf parts to boot!Should tear it up pretty good!Very nice!

  6. #6
    Join Date
    Mar 2006
    Location
    Oregon
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    2,471
    Looks like a Beast will be born, Keep us updated with lot's of pic's!
    If you have Bought a item from me, Please leave me feedback
    If your buying a item from me check my feedback
    Click on link ~ http://www.3wheelerworld.com/showthr...ceaserthethird

  7. #7
    Join Date
    Jan 2003
    Location
    Ripley Tn
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    1,362
    that head pipe is a work of its own
    85 Atc 70
    86 Atc 125m
    85 atc 350x
    86 atc 250r
    86 Atc 250r TT build
    85 Big Red bought brand NEW
    2012 Honda Goldwing Gl1800

  8. #8
    BWard's Avatar
    BWard is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Sep 2009
    Location
    Greeneville,TN United States
    --
    400
    Very nice build here,I Like It !!!
    Riding Wheelers Again

    85 Honda ATC 250R
    86 Honda ATC 350X
    85 Tri-Z
    Future Rides
    1985 Honda ATC 250R, be a Woods Rider
    Past Rides
    85 Honda SELVY ATC 250RSold It
    1983 Honda ATC 200x Raced Pro Mod
    1984 Selvy Tecate 200 Crazy Fast 3 Wheeler
    1985 Yamaha Tri-Z Raced Pro Mod
    1986 Honda TRX 250R Raced Pro Mod

    3B Lightning Yamaha YZ250 Based Three Wheeler
    friend owns and raced it

    Looking for 85-86 250R, 85-86 350x, Tri-Z
    Low Profile Fenders

  9. #9
    Join Date
    Jan 2006
    Location
    ct
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    1,396
    This is going to be great. Keep those pics coming.

  10. #10
    Join Date
    Jul 2005
    Location
    Manheim PA 17545
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    4,875
    i saw your frame yesterday at hre. looks good.

  11. #11
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,008
    can you give more details on the cr125 front end setup? i'm interested in it and how it works and the parts. i think I would like to do that to my 350x. I'm gonnan get it running and then start saving for parts for this sort of a setup.
    ________________
    I'm just a squirrel "Trying" to get a nut!

    1982 200e (Known as "'ol Red")
    1984 200ES (project in work)
    1984 200x (Known as "Beast")
    1985 350X (project in work)
    2011 YFZ450R (Known as "Monster")

    Register your trike here! http://fly.to/TrikeHeaven
    Download your trike repair manuals here FREE!!!
    My Trike and old ATV repair site (www.mikesatvfix.com)
    Best machine shop ever!

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  12. #12
    Join Date
    Jun 2008
    Location
    Lewiston, N.Y.
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    1,476
    Outstanding!!!!

  13. #13
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,008
    how big is that pipe? diamater wise?
    ________________
    I'm just a squirrel "Trying" to get a nut!

    1982 200e (Known as "'ol Red")
    1984 200ES (project in work)
    1984 200x (Known as "Beast")
    1985 350X (project in work)
    2011 YFZ450R (Known as "Monster")

    Register your trike here! http://fly.to/TrikeHeaven
    Download your trike repair manuals here FREE!!!
    My Trike and old ATV repair site (www.mikesatvfix.com)
    Best machine shop ever!

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  14. #14
    Join Date
    Feb 2006
    Location
    EC
    --
    1,607
    Holy insane header! Awesome pipe, man. Can hardly wait to see how much your frame looks like mine......................

  15. #15
    Join Date
    Oct 2004
    Location
    Anaheim
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    1,270
    i think she'll run good...
    86 ATC 500R the duner..
    85 ATC 500R...the not quite finished faster duner
    1985 ATC 250R Bone stock!!
    1985 ATC250R mx/duner
    1986 TRX370R MX/Duner
    94 Banshee 400PV Cheetah 105RWHP

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