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Thread: Pipe ID please

  1. #1
    Join Date
    Feb 2004
    Location
    Tionesta, PA
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    Pipe ID please

    I just bought this pipe and silencer for my 84R. Can anyone tell me what I got. I got a good deal on it - and am replacing it for my stock one that I currently have on it. Plesae help me ID it. I hope someone can help me.
    Last edited by atctim; 06-09-2008 at 04:11 PM.
    RIP - Yamahondaman!! You will never be forgotten!
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  2. #2
    Join Date
    Oct 2006
    Location
    south florida
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    147
    i got one of them at home i will tell you later.

    i want to say hoffman or something like that but i just cant put my finger on it.

  3. #3
    Join Date
    Feb 2004
    Location
    Tionesta, PA
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    will I need to change jets or anything with this pipe swap? All intake components will remain the same - (Stock).
    RIP - Yamahondaman!! You will never be forgotten!
    RIP - Sam Brehm!! Gone but NEVER forgotten!
    RIP - Sandpuppi101 - You will live on in my mind - I miss you friend!

  4. #4
    Join Date
    Feb 2004
    Location
    CUYAHOGA FALLS, OHIO
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    1,242

    jETTERING

    When I put my dg on my 84 i went up a jet size or two. You probably should too. Your pipe might be a bassini. I havent seen any other options for the air cooled. The factory pipes are way restrictive. You will notice a huge gain. I ran a k&n on mine and drilled a few holes on the top cover.
    3-85 ATC 70
    86 ATC 250R
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  5. #5
    Join Date
    Oct 2006
    Location
    south florida
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    147
    do you = yes

    does everybody = no

    will it hurt the engine = maybe

    will it get full benefit of the new pipe if you don't = no


    the thing will probably be a little lean if you don't rejet. maybe not enough to hurt anything but it might. and the thing will run better when jeted corectly

  6. #6
    aquapunk's Avatar
    aquapunk is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Aug 2003
    Location
    borger, texas
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    210
    Hoffman? Do you mean coffman? i have one of those, mines for a 200x
    Attached Thumbnails Attached Thumbnails pipe.jpg   009_9.jpg  

  7. #7
    Join Date
    Oct 2006
    Location
    south florida
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    147
    i think that is it. the name plate on the 2 stroke scilencer is smaller but it is the same color scheme and thick plate style i think that is it. i would bet mine says cofman also. cool thanks.

    is this a rare desirable piece of 3 wheel racing history?

  8. #8
    Join Date
    Mar 2004
    Location
    North Central Ohio!!
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    Tim, i'd swap to a bigger carb to complement that pipe. Look for a nice 34 or 36mm on ebay. I noticed a BIG power gain in my air cooler by swapping carbs.
    2007 YAMAHA YTZ450 went to a great home RIP Sam


  9. #9
    Join Date
    Feb 2004
    Location
    Tionesta, PA
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    what carb comes stock on and air fooler? What carb is a 34 or 36mm? 85 / 86 250R?

    Thanks guys.
    RIP - Yamahondaman!! You will never be forgotten!
    RIP - Sam Brehm!! Gone but NEVER forgotten!
    RIP - Sandpuppi101 - You will live on in my mind - I miss you friend!

  10. #10
    Join Date
    Mar 2004
    Location
    North Central Ohio!!
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    2,712
    The aircooler has a 30 or 32mm. Can't remember which. The 85-up 250R's have 34mm carbs, 85's being roundslide the rest flat slides.
    2007 YAMAHA YTZ450 went to a great home RIP Sam


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