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Thread: Introduction and my 85 ATC250R complete rebuild for trail/MX

  1. #31
    Join Date
    Aug 2015
    Location
    Quebec, Canada
    --
    20
    I was running at 40:1 but switched to 50:1. The plug now as a good color and there is less smoke also. I use the same oil as my snowmobile wich is Motul semi-synthetic 2-stroke oil.

    I also saw the exhaust smoking less with every ride a do so I think the exhaust system was covered with old unburned oil.
    1985 ATC250R - under complete rebuild for MX/trail: tread here
    2014 ½ KTM SXF450 Factory Edition
    2008 TTR125LE - Girlfriend bike and my pitbike

  2. #32
    Join Date
    Mar 2010
    Location
    Slidell, LA
    --
    4,738
    Whew, I hope so brother cause at that ratio and amount of smoke coming out the tailpipe you have no rings left on the piston. I would do a compression test to be in the safe side.
    Feedback for yaegerb: Click Here

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

  3. #33
    Join Date
    Mar 2016
    Location
    Miami, FL
    --
    12
    Did you dyno or speed test this thing?
    Current ATC/ ATV's

    - 1985 Honda 250R - (261cc)- 38MM PWK QV/AS, VFORCE3, RPM Timing ADV., Full DG Exhaust, PRM Nerf Bars, MOOSE Filter, MOOSE Levers
    <NOS Bassani Exhaust Replacement>

    - 2006 Yamaha Banshee YFZ350 - (362cc) - K&N Air Filters w/ UNI Filter Foams, Cool Head, VFORCE3 Reeds, Small Bore Shearers with ASV Levers

    Previous ATC's

    - 1986 Honda 200S - Complete Rebuild
    - 1985 Honda 200S - OEM Stock
    - 1985 Honda 185S - OEM Stock
    - 1984 Kawasaki KLT110 - Bassani full exhaust

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