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Thread: Got my 200x to finally run and drive but...

  1. #1
    Join Date
    Mar 2020
    Location
    Georgia
    --
    73

    Got my 200x to finally run and drive but...

    Well after working on my 200x for almost 13 years Iíve finally got it to run and drive but... only on choke Iím pretty sure the carburetor is ok but I noticed that when it is running on choke I can feel air blowing out the intake on the frame and the choke butterfly whenever I rev it up will go crazy. Itís 100% in time Iíve checked it like 3 times it does it with or without the carburetor on the engine. So I pulled it and lo and behold a bent intake valve was discovered! Itís like a micro bend just enough for you not to see light coming through but enough for air to escape. Any good brands of valves? Should I just go ahead and replace both of them? Do a port and polish job while I have the head off? Bigger valves? Let me know what I need to do. Iíve never done valve jobs before. The specs on the engine is: wiseco 10.25 compression piston and everything else is stock. I have a complete exhaust that I want to put on but the header is too short to reach the second half of the exhaust. I donít know what brand it is but itís old nothing brand new Iím pretty sure itís a dg exhaust but I donít know.

  2. #2
    Join Date
    Mar 2010
    Location
    Slidell, LA
    --
    4,682
    Kibblewhite valves are the best. No need for bigger valves or porting. I would recommend new valve seals.
    Feedback for yaegerb: Click Here

    Need something blasted or polished or both? Send me a PM

  3. #3
    Join Date
    Mar 2020
    Location
    Georgia
    --
    73
    Ok will do. Both of them or just the intake?

  4. #4
    BarnBoy is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jun 2015
    Location
    Oklahoma
    --
    380
    Be very careful if you're porting and polishing yourself. I did my own for the first time and honestly I just polished the exhaust as best I could and removed any casting flash.

    Shindy valves are good, vesrah valves are good, kibblewhites are very good but more expensive. Youll be fine with the first 2 mentioned imo, solid Japanese mfg.

    If you're gonna install new valves it's not plug and play. Ideally you need the valves ground and the seats cut to match to each other perfectly. Find a good machine shop.

    GH Discount ATV does it. Ive used Sandtrax in Tulsa, OK and personally know their machinist. That guy does very very good work.
    1984 HONDA ATC200M
    1985 ATC125M

    Da velder

  5. #5
    Join Date
    May 2006
    Location
    My underwater lair
    --
    4,393
    Quote Originally Posted by Atc 200x 1985 View Post
    .... Both of them or just the intake?
    Change both seals

    Sent from my Z958 using Tapatalk

  6. #6
    Join Date
    Mar 2020
    Location
    Georgia
    --
    73
    I noticed how expensive kibblewhites are. I do know someone who owns a machine shop I’ll ask them on what they can do. I’m new to valve jobs so I don’t know what’s good and what’s not good. So thanks for the info!

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